Graph the following system of inequalities on the coordinate plane. You will need to explain your work. Each correct line graphed WITH the correct explanation and shading is worth TWO points.
Please tell me how you graphed each line and how you determined where to shade
Answers
Answer:
See attached graphs Graph1, Graph2 and Graph3 and detailed explanation below
Step-by-step explanation:
The process for plotting and shading are essentially the same but with different inequalities
To plot any line
We need two pointsPlug in a value for x and find the corresponding y valueRepeat for another x value and find the corresponding y valueDraw a straight line through the two pointsTo determine area to shade
Choose a point on either side of the line from the graph. See if the corresponding (x,y) values satisfy the inequality. If they do, then that's the area to shade. If not, shade the other area
1. Inequality y > -3x - 2
The line equation is y = -3x -2
Let's choose x = 0. Then y = -3(0) -2 = -2. So one point is (0, -2)
Choose another value for x, say x = 1
y = -3(1) - 2 = -3-2 = -5. So another point is (1,-5).
Draw a straight line through both points (see attached Graph1)
Determining area to shade
Choose a point on the graph on one side of the line. Let's choose (1,2). So x = 1 and y = 2. Does this satisfy the inequality y = -3x -2? Let's see
Is 2 > -3(1) - 2 ?
2 > -3-2 ?
2 > -5 ? YES since a positive number is greater than a negative number. So the area containing (1,2) should be shaded as shown in Graph 1
2. Inequality 4x + 5y ≤ 20
Line equation is 4x + 5y =20
Convert to a function of x as follows
Subtract 4x from both sides ==> 5y = 20 -4xDivide by 5 both sides ==> y = 20/5 - (4/5)x ==> y = 4- 4x/5Choose two values of x and find corresponding y values to get the coordinates of two points
Plug x = 0 into line equation ==> y = 4- 4x/5
==> y = 4 - 4(0)/5 = 4
==> (0, 4) is one point
Choose another value of x, say 5(this is a convenient value since we are dividing by 5)
==> y = 4- 4(5)/5 = 4-4 = 0
==> (5, 0) is another point
Draw straight line through (0,4) and (5,0)
To determine area to shade let's choose a point on the graph. (0,0) is a convenient point. Do the values of x=0 and y=0 satisfy the inequality
4x + 5y ≤ 20?
Plugging in x = 0 and y = 0 gives us
4(0) + 5(0) = 0 and 0 is indeed ≤ 20
So the inequality is satisfied at (0,0)
Shade the region on the side of the line where (0,0) is (see Graph2)
3. Inequality y > -4
The line equation is y = -4
Since this equation does not involve x, the line plot will be a horizontal line at y = -4 for all x values
Simply draw a horizontal line which crosses the y axis at y = -4
To determine which area to shade, choose a point. Use (0,0)
Does y = 0 satisfy the inequality y > -4?
0 > -4 so indeed the point (0,0) satisfies the inequality. Just shade the area on the side of the line which contains (0,0). This will be the region above the line y = -4 See Graph3
Hope that helps :)
Related Questions
1.09 x 10² convert to standard form
Answers
Answer:
109is the answer
Step-by-step explanation:
Hope it helps you
The sum of two numbers is 58. The first number is 8 less than half the second number. Let c rep
number. Let d represent the second number. Which statements about solving for the two numbe
all that apply.
The equation c+d=58 represents the sum of the two numbers.
The equation c+d=58 represents the sentence "The first number is 8 less than half the seco
The equation C=d-8 represents the relationship between the two numbers.
The equation C=d-8 represents the sum of the two numbers.
The number d is 14.
The number c is 44.
The number is 14
Answers
Answer:
The following are the correct choices
First : The equation c + d represents the sum of the two numbers
Third: The equation c = (1/2)d - 8 represents the relationship
and the last choice : The number c is 14
Step-by-step explanation:
Translate the word problem into equations and solve for c and d where c is the first number and d the second
Sum is 58 translates to
c + d = 58 (1) ===> First choice
First number is 8 less than half the second number translates to
c = (1/2)d - 8 (2) ==> Third choice
Multiply equation (2) by 2 on both sides giving
2c = d - 16 ==> 2c - d = -16 (3)
Add equations (1) and (3) giving
c + d + 2c - d = 58-16
3c = 42
c = 42/3 = 14 ===> Last choice
Substituting for c in equation (1) gives
14 + d = 58
d = 44
When graphed y=3x+5 will it increase or decrease
Answers
It would increase positively because the slope is 3
15) Falcons can dive at speeds of up to 318 feet per second. Convert this speed to miles per
hour.
Answers
Answer:
Step-by-step explanation:
318 feet per second
So 19080 feet per minute
So 1,114,800 feet per hour
So 216.818181... miles per hour
The length L of a Brazilian snake m months after birth is
L(m) = 3(m - 8)-5 inches.
(a) Use function notation to give the equation that needs to be solved in order to find how old the snake is when it is 5 feet 1 inches long.
Answers
The snake would be 30 months old when his length is 5 feet 1 inches.
• Algebra is a branch in mathematics which deals with symbolic and the rule for manipulation of those symbols. Algebra is also divided into some sub branches such as advanced algebra, abstract algebra , linear algebra, elementary algebra etc.
• The basics of algebra contains numbers, variables, constants, expressions and equations. The basic operations in mathematics are addition, subtraction, multiplication, division.
The length L of an Brazilian snake m months after birth is given by
L(m) = 3(m-8) -5 inches
We need to find how much the snake is old the snake Is when it is 5 feet 1 inches long
L(m) = 5 feet 1 inches
We know that 1 feet = 12 inches
L(m) = 5*12+1
= 61 inches
61 = 3(m-8)-5
66 = 3(m-8)
m-8 = 22
m = 30
The snake would be 30 months old when his length is 5 feet 1 inches.
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In a election of municipality two candidates P and Q stood for the post of mayor and 35000 people were in voter list. Voters were supposed to cast for a single candidate .22000 people cast vote for P, 5500 people cast for Q and 1500 cast vote even for both. How many people didn't cast vote find it
Answers
6000 people didn't cast their vote and 1500 votes are not valid in the election
Given that In a municipal election, two candidates, P, and Q, ran for the position of Mayor, and 35000 people voted. Voters were supposed to vote for only one candidate. P received 22000 votes, Q received 5500 votes, and 1500 cast votes for P and Q.
Number of votes for P =22,000
Number of votes for Q= 5500
1500 cast votes to Both P and Q, these votes are not valid because each one is supposed to vote only for one.
Therefore, the number of votes not valid is 1500
Total people cast vote= sum of votes for every party
Total people cast vote=22,000+ 5500+1500
Total people casted vote=29,000
Therefore, 6000 people didn't cast their vote and 1000 votes are not valid in the election
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Circumference is:
a) The number of square units
that cover the surface of a circle.
b) 3.14
c) The measurement around
the outside of a circle.
d) none of the above
Enter
Answers
A is area
B is pi
C is circumference
bracelet because
Click an item in the list or group of pictures at the bottom of the problem and, holding the button down, drag it into the correct position in the answer box. Release your mouse button when the item is place. If you change your mind, drag the item to the trashcan. Click the trashcan to clear all your answers. Prove: The segment joining the midpoints of the diagonals of a trapezoid is parallel to the bases. Slopes are equal; therefore, segments are parallel
Answers
The segment joining the midpoints of the diagonals of a trapezoid is parallel to the bases
How to prove: The segment joining the midpoints of the diagonals of a trapezoid is parallel to the bases?From the figure, we have the following coordinates
B = (a, 0)
D = (d, c)
The midpoint of line segment BD is calculated as
BD = 1/2 * (x1 + x2, y1 + y2)
So, we have
BD = 1/2 * (a + d, 0 + c)
This gives
BD = ((a + d)/2, c/2)
Also, we have:
Lines MN and AB are horizontal lines
This means that they have a slope of 0
i.e.
Slope of AB = Slope of MN = 0
Parallel lines have equal slope
Hence, the segment joining the midpoints of the diagonals of a trapezoid is parallel to the bases
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Graph the image of the pre-image shown below, reflected across the y-axis.
PLEAS ANSWER QUICK ASAP
Answers
Answer: (3,5),(9,1),(6,-9)
Step-by-step explanation:
Just mirror it to the other side.
WILL GIVE BRAINILEST TO IF ANSWERED CORRECTLY PLS
Draw a line segment with endpoints M and R. Now draw a parallel line segment that is the same length as segment MR with the endpoints M′ and R′ in the same order.
Which answer correctly describes the transformation from segment MR to segment M′R′?
Answers
Answer:
The transformation that map line RS to line R"S" is " rotation of 180° about the origin, followed by a translation (x, y) → (x + 1, y + 1)" ⇒ B
Step-by-step explanation:
Let us revise some transformationIf the point (x, y) rotated about the origin by angle 180° counterclockwise, then its image is (-x, -y) ⇒ R(180, O) (x, y) → (-x, -y) If the point (x, y) translated horizontally to the right by h units then its image is (x + h, y) ⇒ T (x, y) → (x + h, y)If the point (x, y) translated vertically up by k units then its image is (x, y + k) ⇒ T (x, y) → (x, y + k)∵ The coordinates of the point R = (-2, 4)∵ The coordinates of point R" = (3, -3)→ Both coordinates in R" have opposite signs then R∴ R rotated 180° about the origin ⇒ using the 1st rule above∴ R' = (2, -4)→ Find the difference between the x-coordinate of R" and x-coordinate of R'∵ xR" - xR' = 3 - 2 = 1→ By using the 2nd rule above∴ R' translated 1 unit to the right → Find the difference between the y-coordinate of R" and y-coordinate of R'∵ yR" - yR' = -3 - (-4) = -3 + 4 = 1→ By using the 3rd rule above∴ R' translated 1 unit up∴ The rule of translation is T(x, y) ⇒ (x + 1, y + 1)Let us use these 2 rules on S to find S"∵ The coordinates of the point S = (-4, -1)∵ S is rotated 180° around the origin→ By using the 1st rule above, opposite the signs of its coordinates∴ S' = (4, 1)∵ S' translated 1 unit right→ By using the 2nd rule above, add its x-coordinate by 1∵ S' translated 1 unit up→ By using the 3rd rule above, add its y-coordinate by 1∴ S" = (4 + 1, 1 + 1)∴ S" = (5,2)→ That means the rules of transformation of point R is rightThe transformation that map line RS to line R"S" is " rotation of 180° about the origin, followed by a translation (x, y) → (x + 1, y + 1)"
Translation
Explain Explain Explain Explain
The announcer said, ingrid won the 100 metre race in 13.9 seconds. Her time was originally measured to 2 decimal places. What was the slowest time she could have run?
Answers
Answer:
13.94 seconds
Step-by-step explanation:
The greatest number with 2 decimal places that can be rounded to 13.9 is 13.94.
Answer: 13.94 seconds
The announcer said that Ingrid has won the race in 13.9 seconds, then the slowest time she could have run is 13.94 seconds.
What is approximation?Something similar to something else but not precisely the same is called an approximation. By rounding, a number can be roughly estimated.
By rounding the values in a computation before carrying out the procedures, an estimated result can be obtained.
13.94 is the largest number that can be rounded to the nearest two decimal places and be equal to 13.9.
Because after the second decimal, that is 4 the number has to increase as per the rules of approximation. That's why the number 13.94 up to two decimal places is correct.
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3. What are all the factors of 12? a. 12, 24, 36 b. 1, 2, 4, 6, 12 c. 12, 24, 36, 48 d. 1, 2, 3, 4, 6, 12
Answers
Answer:
b
Step-by-step explanation:
because it is all the factors
t distribution, or neither. Claim: μ = 83. Sample data: n = 24, = 103, s = 15.1. The sample data appear to come from a population with a distribution that is very far from normal, and σ is unknown.
Answers
Student t distribution
A measurement of a data set's deviation from the mean is referred to as "standard deviation". While a high standard deviation indicates that the data are more spread, a low standard deviation suggests that the data are clustered around the mean.
The average of a group of variables is referred to as the mean in mathematics and statistics. There are several methods for calculating the mean, including simple arithmetic means (adding the numbers together and dividing the result by the number of observations), geometric means, and harmonic means.
We have,
Claim : μ = 83
Sample data : s = 15.1, n = 24, and x = 103
The hypothesis test uses the student t distribution because we are evaluating the mean in this situation, the sample standard deviation of a normal distribution is estimated or supplied, and the population's standard deviation is unknown.
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What is In(3x)=2 ? Pre-Calc/Calc
Answers
The final value of the equation is x=e²/3
A natural log is a logarithm with the base "e." It is represented by the symbol "ln." In other words, loge = ln. In other words, the natural logarithm lacks a base. When "ln" is recognized automatically, "e" is assumed to be its base. The same set of logarithmic rules applies to all logarithms, including the natural logarithm. As a result, the following are the key natural log rules (also known as ln rules):
ln (mn) = ln m + ln nln (m/n) = ln m - ln nln mn = n ln mln a = (log a) / (log e)ln e = 1ln 1 = 0log∨b m = x ⇒ m = b∧xlog∨e(3x)=23x=e²x=e²/3Therefore the final answer for the given question is x=e²/3
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A 100kg bag contains peanuts and almonds. Peanuts are priced at $2 per kg and almonds are priced at $2.40 per kg. If the whole bag is priced at $2.08 per kg, how many kg of peanuts and almonds are there in the bag?
Answers
Answer:
Step-by-step explanation:x+y=100
(2x+2.4y)/100=2.08
x=80
y=20
Use the shape to answer the question.
7 cm
7 cm
7 cm
9 cm
9 cm
what’s the perimeter
Answers
Answer:
39cm
Step-by-step explanation:
7+7+7+9+9 = 39 - hope this works: )
There are 14 reams of paper in a case. How many total reams of paper are in 15 cases?
Answers
Work Shown:
1 case = 14 reams
15*(1 case) = 15*(14 reams)
15 cases = 210 reams
Answer:
There are 210 reams of paper in 15 cases
Step-by-step explanation:
1 case = 14 reams
To find out the total of reams in 15 cases, multiple both sides by 15
15 x 1 case = 15 x 14 reams
15 cases = 210 reams
find the area of a 36 inch tv with the aspect ratio 16:9
Answers
A ratio shows us the number of times a number contains another number. The area of the TV will be 729 inches².
What is a Ratio?A ratio shows us the number of times a number contains another number.
Given that the aspect ratio of the 36-inch tv is 16:9. Therefore, the width of the TV will be,
Length of the TV / Width of the TV = 16 : 9
36 inches / Width of the TV = 16 : 9
Width of the TV = 20.25 inches
Now, the area of the TV will be,
Area = Length of the TV × Width of the TV
= 36 inches × 20.25 inches
= 729 inches²
Hence, the area of the TV will be 729 inches².
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Does doubling the height of a cylinder have the same effect on the volume of a cylinder as doubling the radius? Explain
Answers
Answer:
No, doubling the height will just double the volume.
Step-by-step explanation:
It doubles the volume. Volume of a cylinder: volume= \pi *radius squared * height.
Answer:
No, it does not have the same effect. Doubling the height of a cylinder doubles the volume, while doubling the radius generates a volume 4 times greater.
Step-by-step explanation:
:)
help solve show how to!!!
M(-7)=|3x - 2| + 2
Answers
Answer:
M=|3x-2|+2/7
Step-by-step explanation:
Find the value of M:
Divide each term by -7. Simplify.
M=|3x-2|+2/7
Find the value of x:
Simplify both sides of the equation, then isolate the variable.
x=-7M/3 OR x=7M/3+4/3
I hope this helps! I tried. Hope you get it right!
Lamar wants to pour 64.98 grams of salt into a container. So far, he has poured 38.5 grams. How much more salt should Lamar pour?
Answers
Answer:
Step-by-step explanation:
wants to pour=64.98
have poured=38.5
how much more can he pour=
64.98
-38.50
______
26.48(ans)
If X = 6 units, Y = 8 units, and h = 6 units, what is the area of the trapezoid?????????
-7th
Answers
The area of the trapezoid is 42 square units
How to determine the areaThe formula for area of a trapezoid is expressed as;
Area = a + b/ 2 h
Where;
a is the length of the side = 6 unitsb is the length of its base = 8 unitsh is the height of the trapezoid = 6 unitsNow, to determine the area of the trapezoid, we need to substitute the values of the length of the side and its base with the height of the trapezoid.
Substitute the value into the equation
From the above information, we have that;
Area = 6 + 8/ 2 (6)
Find the quotient
Area = 14/ 2(6)
Area = 7(6)
Multiply through
Area = 42 square units
We have that the area of the trapezoid takes the value 42 square units
Thus, the area of the trapezoid is 42 square units
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V=1/3xr^2(h-1) solve for h
Answers
Answer: h=3v+xr^{2}/xr^{2}
Step-by-step explanation:
2) Suppose you have a student loan of $5,700 at 7% interest compounded quarterly with
quarterly payments for 10 years.
a) How much would the scheduled payments on the loan be?
b) If you pay an extra $75 each quarter, how long will it take to pay off the loan?
c) How much will you save in payments over the life of the loan by paying $75 extra
each quarter?
I need someone to solve a b c to get the answers
Answers
75 dolar freefire topupnow this my gamr
Can someone provide an example and counter example of a function ?
Answers
Answer:
A weekly salary is a function of the hourly pay rate and the number of hours worked
Step-by-step explanation:
a function is a map assigning values of a result or solution set to values of a set of initial or starting values.
we typically name these starting values x and the solution values f(x) or y (the results "created" out of x).
we often say
y = f(x)
and provide an expression or table to explain the logic of the mapping between x and f(x).
the only rule to be a function and not just a general relationship between these 2 sets :
every value in the set of starting values must have exactly one assigned solution value. not 0, not 2 (or more). one and only one.
but yes, different values of x can have the same assigned solution value. that is not a problem for a function. it just cannot be the other way around. there cannot be different solution values assigned to the same value of x.
so, a typical example of a function is a line.
e.g.
y = f(x) = 5x + 12
for every value of x you could think of (and everything else) there is exactly one result value calculated.
or the score board in a sports event :
athlete 1 : 12 points
athlete 2 : 24 points
athlete 3 : 20 points
athlete 4 : 22 points
...
the athletes are the "x". and their associated points the "f(x)" or "y".
no athlete is listed multiple times with different scores.
a typical example of not being a function is a circle. for almost every value of x inside the circle (that means for almost every point of the horizontal diameter of the circle) there are 2 values of y (that means points on the arc of the circle) : one above and one below the diameter.
or a strange score board like
athlete 1 : 12 points
athlete 2 : 24 points
athlete 3 : 20 points
athlete 2 : 22 points
athlete 4 : 22 points
...
athlete 2 is listed twice with 2 different scores.
so, this is therefore not a function.
In its Fuel Economy Guide for 2019 model vehicles, the Environmental Protection Agency gives data on 1259 vehicles. There are a number of high outliers, mainly hybrid gas‐electric vehicles. If we ignore the vehicles identified as outliers, however, the combined city and highway gas mileage of the other 1231 vehicles is approximately Normal with mean 22.8 miles per gallon (mpg) and standard deviation 4.8 mpg.
How high must a 2019 vehicle's gas mileage be to fall in the top 15% of all vehicles?
Answers
Answer:
I’m not so sure
Step-by-step explanation:
Which statements describe the key features of the graph of f(x) = -
The graph has a y-intercept at -2.
The graph has an x-intercept at -6.
The graph has a vertical asymptote at x = 3.
The graph has a vertical asymptote at x = -3.
The graph has a horizontal asymptote at y = 1.
18-3x-x? Check all that apply.
x²-9
Answers
Find the slope of the line
Please help thank you
Answers
Answer:
y=3/4x
Step-by-step explanation:
I use the Rise/Run method. It helps the most for me
-) Use the E -
& definition of a limit to prove that
lim 7x3 = 4
x-1
Answers
The [tex]\lim_{x \to 1} 7x-3=7(1)-3=4[/tex] using the ε − δ definition of a limit.
The value that a function approaches when the input approaches a certain value is known as a limit. Calculus and mathematical analysis are not possible without limits, which are also required to determine continuity, derivatives, and integrals.
The limit of f(x) at x = c is L according to the epsilon-delta definition of limits if ε > 0 there's a δ > 0 such that if the distance of x from c is less than, then the distance of f(x) from L is less than ε. The idea that we can approach L as closely as we like is expressed in this way.
[tex]\lim_{x \to a}f(x)= L[/tex] if ∀ ε > 0, ∃ δ > 0
0 < | x − a| < δ
⇒ | f(x) − L | < ε
Now, consider the limit
[tex]\lim_{x \to 1} 7x-3=4[/tex]
Here, f(x) = 7x - 3, a = 1, L = 4
Proof:
∀ ε > 0, ∃ δ = ε > 0
0 < | x - 1 | < δ
⇒ | 7x - 3 - 4 | = | x - 1 | < δ = ε
Hence, [tex]\lim_{x \to 1} 7x-3=4[/tex]
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Please help me with the simplifying
Answers
The key here is to not worry too much and just follow PEMDAS.
Here we have the expression [tex](5\cdot 7)^2[/tex]. Following PEMDAS, we complete the expression inside the parentheses first, or [tex]5\cdot 7 = 35[/tex]. This gives us [tex](35)^2[/tex] or just [tex]35^2.[/tex]
Hope this helps.