k = 3
So if your looking at the test I think your looking at, C.
Let g(x) = {2x + 4 if x < −1, x + 4 if x ≥ −1.
Find the value of g^-1(-1)
The inverse of a function when x = -1 is g^-1(-1) = -5/2
Inverse of a functionLinear functions are function that has a leading degree of 1. Given the expression below;
g(x) = 2x + 4
Determine the inverse
y = 2x + 4
Replace y with x
x = 2y + 4
Make y the subject of the formula
2y = x - 4
y = (x-4)/2
g^-1(x) = (x-4)/2
Substitute x = -1 into the equation
g^-1(x) = (-1-4)/2
g^-1(-1) = -5/2
Hence the inverse of a function when x = -1 is g^-1(-1) = -5/2
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How many significant digits are in the given measurement:
6040.0050 m
7
0
8
4
Answer:
8 significant digits
Step-by-step explanation:
Let's count
6040.0050
⬇ ⬇⬇⬇.⬇ ⬇⬇ ⬇
1 234 567 8
therefore it's 8 significant figures
which of rthe following goups of scores would hav ethe smallest standard deviation 20, 40, 60, 80, 100
In dataset 60 is the data is spread more tightly around the mean than in other datasets. Accordingly, it would have a smaller standard deviation.
n dataset C, the data is spread more tightly around the mean than in other datasets. Accordingly, it would have a smaller standard deviation
Standard deviation is 60
What do you mean by standard deviation?The term "standard deviation" (or "") refers to a measurement of the data's dispersion from the mean. A low standard deviation implies that the data are grouped around the mean, whereas a large standard deviation shows that the data are more dispersed. In contrast, a high or low standard deviation indicates that the data points are, respectively, above or below the mean. A standard deviation that is close to zero implies that the data points are close to the mean. The curve at the top is more dispersed and has a greater standard deviation than the curve at the bottom, which is more concentrated around the mean and has a lower standard deviation.
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List the numbers in order from least to greatest.
5/8, 1/2, 0.3 , -3/5 , -0.8 , -1/10
Answer:
-3/5, -1/10, -0.8, 0.3, 1/2, 5/8
Step-by-step explanation:
negatives are always less than positive numbers. As you can see the first numbers that are negative count down and then once it turns positive the numbers count up. For example, it goes -3,-1,-0 then 0,1,5
1. 3x-2x² = 7
2. 5-2x² = 6x
3. (x+3)(x + 4) = 0
4. (2x+7)(x-1)=0
5. 2x(x-3) = 15
Answer:
No 3
2x+4x+3x+12=0
9x+12=0
9x=0_12
9x=-12
divide by 9
x=1.333
Please Help I will give Brainlist !!! Its a Math Problem !! Given that the length of two sides of a triangle are 3 cm and 2 cm, which of the below is the only measure that could possibly be a length of the last unknown side?
Question options:
2 cm
5 cm
6 cm
9 cm
Answer:
2
Step-by-step explanation:
Triangle side theorem states the sum of the lengths of any two sides of a triangle must be greater than the remaining side
3 + 2 = 5 third side would have to be LESS than 5
so the only answer is 2 cm
write an equation of the line . through (1,-2);parallel to 2x=3y+4
Answer:
y = 2/3x - 8/3
or 2x = 3y + 8
Step-by-step explanation:
2x = 3y + 4
3y = 2x - 4
y = 2/3x - 4/3
If two lines are parallel, their slopes are equal
if m = 2/3, y = -2, x = 1
y = mx + b
-2 = 2/3(1) + b
-2 = 2/3 + b
b = -2 - 2/3 = -8/3
y = 2/3x - 8/3
or 3y = 2x - 8
or 2x = 3y + 8
if i drop a watermelon from the top of a water tower, and it takes 3.34 seconds to hit the ground, calculate how tall the tower is in meters.
The height of the water tower is found to be 54.66 meters.
What is acceleration due to gravity?A free-falling object is one that is falling solely due to gravity.
Some key features regarding the acceleration due to gravity are-
A free-falling component has a downward acceleration of 9.8 m/s/s (on Earth). This magnitude for the acceleration of a free-falling object is so significant that it has its own name. The acceleration of gravity is the acceleration of any object moving solely under the influence of gravity. In fact, the acceleration of gravity is so important quantity that scientists have a special symbol to represent it - the symbol g. The most precise numerical value for gravity's acceleration is 9.8 m/s/s.Now, according to the question;
It takes a watermelon 3.34 sec to reach the ground.
Use the equation of motion in straight line.
D = (1/2) x (gravity) x (time)²
D is the height of the water tower.
= (1/2) x (9.8 m/s²) x (3.34 sec)²
= (4.9 m/s²) x (11.16 sec²)
D = 54.66 meters.
Thus, the height of the water tower is estimated as 54.66 meters.
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What clockwise angle rotations, if any, between 0 degrees and 360 degrees make the figure rotate onto themselves?
A clockwise 360 degrees angle rotation will make the figure rotate onto themselves.
Any angle rotations other than a 0 degree or a 360 degree will change the figure and so does not rotate onto themselves.
To rotate onto themselves, which means the figure should not be changed after the rotation transformation, we have to rotate it 360 degrees.
We are asked for a clockwise angle rotation, so the require angle rotation is of 360 degrees.
0 degree angle rotation will not make a rotation. So we will go with a 360 degree rotation. Any figure after a 'full circle' clockwise rotation will goes onto themselves.
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How do you do these problems and solve
These questions are equations of one variable. An equation is an expression which has an equal sign, which is then evaluated isolating the variable in one side if the equation.
1) r + 12 = 36
r = 36 -12
r = 24
2) 22+ m = 24
m = 24 - 22
m = 2
3) -27 = n - 29
n = 2
4) -5 = b -26
b = 21
5) -17 = x -23
x = 5
6) v - 26 = - 4
v = 22
7) x+12 = 38
x = 26
8) 8= -12+ a
a = 20
9) b- 21 = 4
b = 25
10) 2 = x - 23
x = 25
11) x + 25 = 46
x = 21
12) -18 = x - 22
x = - 4
These questions are equations of one variable. An equation is an expression which has an equal sign, which is then evaluated isolating the variable in one side if the equation.
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PLEASE ANSWER FAST
How many times larger is 7 x 10^5 than 2 x 10^3?
Answer:
698,000
Step-by-step explanation:
7×10^5=700000
2×10^3=2000
700,000-2000=698,000
The given 7 * [tex]10^5[/tex] is 3.5*10² times larger than 2 * 10³.
Given that,
To determine, how many times larger is 7 x 10^5 than 2 x 10^3.
What is the Ratio?The ratio can be defined as the comparison of the fraction of one quantity towards others. e.g.- water in milk.
What is simplification?The process in mathematics to operate and interpret the function to make the function or expression simple or more understandable is called simplifying and the process is called simplification.
Here,
We have two values, here we have to determine the relationship between the two values.
[tex]ratio = 7*10^5 / 2 * 10^3\\Ratio = 3.5 * 10 ^2[/tex]
Implies,
[tex]7*10^5 = 3.5*10^2 (2 * 10^3)[/tex]
Thus, the given 7 * [tex]10^5[/tex] is 3.5*10² times larger than 2 * 10³.
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tim has 74 socks, that are white or black. he has 1 more pair of white socks than black socks. how many individual socks of each color does he have?
Tim owns 74 socks, the colours of which are unknown.
He does, however, have an additional pair that is white rather than black.
Therefore, it suggests that we are working with the two hues white and black.
The result of dividing the total number of socks by two is:
= 74/2
= 37 socks, two pairs each for black and white.
But let's not forget that Tim has a pair of white socks in addition to his black pair.
The total number of white socks is equal to= 37+1= 38 socks.
Total black sock pairs= 37-1=36 socks.
Last but not least, the question asks us to count the number of single socks rather than pairs.
For white then:
There will be = (38x 2) socks per pair.
= 76 socks
For Black
The individual socks will be = (36 × 2)socks
= 72 socks
We can then deduce that there are 76 individual socks for white and 72 individual socks for black.
How many pairs of socks must you take to find a matching pair?The solution would have to be four. Despite the large number of socks in the drawer, there are only three different colours, so if you take four socks, you will undoubtedly find at least one pair that matches.
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Find the reciprocal of -1 1/17
Answer:
17/-11
Step-by-step explanation:
why,because reciprocal in mathematics means changing the numerator to the denominator and denominator to numerator.
HOPE THIS HELPS
A parallelogram has an AREA of 7 square units. If the height that corresponds to a base is 14 units, what is the base?
Answer:
b = 0.5
Step-by-step explanation:
a = b x h
7 = 14b Divide both sides by 14
0.5 = b
3. Exponential Function:
Bacteria grows on food by doubling every hour.
If the bacteria initially covers 10% of the food, it will
cover the entire food source in 3.3 hours.
Answer:
[tex]y=0.1(2)^x[/tex]
where x is time in hours, and y is the number of bacteria in percent in decimal form.
Step-by-step explanation:
General form of an exponential function:
[tex]y=ab^x[/tex]
where:
a is the initial value (y-intercept).b is the base (growth/decay factor) in decimal form.Define the variables:
Let x = time (in hours)Let y = number of bacteria (in percent in decimal form)If the bacteria grows on food by doubling every hour then the growth rate b = 2.
If the bacteria initially covers 10% of the food then y = 10% when x = 0.
Therefore, a = 10% = 0.1.
Therefore, the equation is:
[tex]y=0.1(2)^x[/tex]
Substitute x = 3.3 into the found equation:
[tex]\begin{aligned}x=3.3 \implies y & =0.1(2)^{3.3}\\& =0.9849155307...\\& =1.0\:\sf (nearest\:tenth)\end{aligned}[/tex]
As 1.0 = 100%, this justifies the claim.
[tex]\begin{array}{|c|c|c|}\cline{1-3} x & y & y \\\cline{1-3} 0 & 10\% & 0.1\\\cline{1-3} 1 & 20\% & 0.2\\\cline{1-3} 2 & 40\% & 0.4\\\cline{1-3} 3 & 80\%\ & 0.8\\\cline{1-3} 4 & 160\% & 1.6\\\cline{1-3}\end{array}[/tex]
use the foil method to evaluate the expression: left parenthesis 2 plus square root of 3 right parenthesis left parenthesis square root of 3 minus 7 right parenthesis
-5√3 - 11 is value of expression.
What do math Surds mean?
An expression with a square root, cube root, or other root symbol is called a surd. Since the decimals of irrational numbers do not finish or recur, they cannot be expressed properly in decimal form. Surds are used to write irrational numbers precisely.( 2 + √3) (√3 - 7)
First = 2√3
outer = 2(-7) = -14
inner = √3 √3 = 3
last = √3 (- 7)
= 2√3 + (- 14) + 3 + ( - 7√3)
= -5√3 - 11
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The price of a watch was increased by 20% to £162.
What was the price before the increase?
Answer:
120% = 162
10% = 13.5
100% = 135
so it's £135
hope this works :)
10. Two of the greatest rainfalls ever recorded were on, July 4, 1956.
In Unionville, Maryland it rained 1.23 in. in 1 min. In Curtea-de-
Arges, Romania on July 7, 1889 it rained 8.1 in. in 20 min. If it
had rained for 20 min in Unionville at its same record pace, what
would be the difference between the two rainfall amounts?
Answer:
The difference would be Unionville would have had 24.6 in. of rain and Arges only had 8.1 in
Step-by-step explanation:
25. ALGEBRA Angle E and Angle F are supplementary. The measure of angle E is 54 more than the
measure of Angle F. Find the measures of each angle.
The measure of each angle is , ∠E = 117° and ∠F = 63°
What is an angle ?In the geometry, angle is defined as the geometry formed by the multiple rays. Or we can also say that the angle is a figure formed by two rays with having same initial point. The rays are also known as the sides of the angle. A angle can have two rays.
What are supplementary angles?Angles which are on the same line are supplementary angles. The sum of supplementary angles are always equals to 180 degree.
Some common terms related to angles :
Endpoint : It is the point where the rays met to each other.Ray : Ray is the side or line segment on which angle is formed.Curve : It is a line but not straight i.e. a bended line.Tangent : A line which touches the surface of curve.In the given question:
Let measure of ∠E = x
and, measure of ∠F = y
as ∠E and ∠F are supplementary angles therefore their sum is 180
i.e. m∠E + m∠F = 180
=> x + y =180
also, m∠E is 54 more than m∠F
=> y+54 + y = 180
=> 2y + 54 = 180
=> y = 180-54 / 2 = 63
and , x = y + 54 = 63 + 54 = 117
Hence, ∠E = 117 degree and ∠F = 63 degree
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The teacher is handing out note cards to her students. She gave 48 note cards to the first student, 54 note cards to the second student, 60 note cards to the third student, 66 note cards to the fourth student, and 72 note cards to the fifth student. If this pattern continues, how many note cards will the teacher give to the sixth student?
Answer:
She will give 78 students to the sixth student.
Step-by-step explanation:
The pattern is adding 6 each time.
russell runs 9/10 miles in 5 minutes. at this rate how many miles can he run in one minute
Answer:
I´m pretty sure it is 1.8 miles
Step-by-step explanation:
Show graphically that the system of linear equations 5x – y = 14 ; x – 2y =1 has a unique solution. Write the coordinates where line x – 2y =1 intersects the X-axis. Write the solution.
The graph of the system of linear equations is shown in the image below, where the solution is: (3, 1)
The coordinates where x - 2y = 1 intersects the x-axis (horizontal axis) is: (-14, 0)
How to Determine the Solution to the System of Equations?Given the linear equations:
5x – y = 14 ---> equation 1
x – 2y = 1 ---> equation 2
Rewrite both equations in slope-intercept form as y = mx + b, where b represents the y-intercept of the line and m represents the slope.
5x - y = 14
-y = -5x + 14
y = 5x - 14 (slope is 5 and y-intercept is -14)
x - 2y = 1
-2y = -x + 1
y = 1/2x - 1/2 (slope is 1/2, and the y-intercept is -1/2).
Therefore, the graph of the system of linear equations is shown in the image below, where the solution is: (3, 1)
The coordinates where x - 2y = 1 intersects the x-axis (horizontal axis) is: (-14, 0)
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Write 2.5 as a mixed number and as an improper fraction. Write your answers in simplest form.
Answer:5/2 and 2 1/2
Step-by-step explanation:
Answer:
Step-by-step explanation:
2.5 as a mixed number is 2 1/2 since 1/2 = 0.5
2.5 as an improper fraction is 5/2
Which graph shows the function f(x) = x with an input of f ?
A coordinate plane with a line passing through (negative 4, negative 1), (negative 3, 0), and (0, 3).
A coordinate plane with a line passing through (negative 2, negative 5), (0, negative 3), and (3, 0).
A coordinate plane with a line passing through (negative 1, negative 3), (0, 0), and (1, 3).
A coordinate plane with a line passing through (negative 3, negative 2), (0, 0), and (3, 1).
Using translation concepts, the graph that shows that function f(x) = x with an input of f(x - 3) is given by:
A coordinate plane with a line passing through (negative 2, negative 5), (0, negative 3), and (3, 0).
What is the missing information?The input of the function, of f(x - 3), is missing.
What is a translation?A translation is represented by a change in the function graph, according to operations such as multiplication or sum/subtraction either in it’s definition or in it’s domain. Examples are shift left/right or bottom/up, vertical or horizontal stretching or compression, and reflections over the x-axis or the y-axis.
For this problem, the function is:
f(x) = x.
The translation is in the input, f(x - 3), meaning that the function is shifted 3 units right and defined by:
f(x - 3) = x - 3.
Hence three points on the graph are:
x = -2, f(x) = -5.x = 0, f(x) = -3.x = 3, f(x) = 0.Hence the correct description is:
A coordinate plane with a line passing through (negative 2, negative 5), (0, negative 3), and (3, 0).
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Answer:
D
Step-by-step explanation:
Gary, the school chef, needs to make 40
tacos for every 15 students. How many tacos
would Gary need to prepare for 3 students?
The number of tacos that is needed for 3 students is 8 tacos.
How many tacos would be needed for 3 students?
The first step is to determine the number of tacos that is needed for one student. To determine this value, divide the total number of tacos by the total number of students.
Division is the mathematical operation that is used to determine the quotient of two or more numbers. Division entails splitting a number into equal groups using another number. The sign used to denote division is ÷
Tacos that should be prepared for one student = total tacos / number of students
= 40 / 15
In order to determine the number of tacos needed for 3 students, multiply the result gotten in the previous step by 3. Multiplication is the process used in determining the product of two or more numbers. The sign used to denote multiplication is x .
Tacos needed for 3 students = (40 / 15) x 3 = 8
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suppose that 10% of people are left handed. if you pick two people at random, what is the probability that they are both left handed? express your answer as a decimal rounded to three decimal places.
The probability that they are both left-handed is 0.01
Probability is the number of ways of achieving success.
the total number of possible outcomes.
Probability takes values between 0 (no chance) and 1 (certain) inclusive.
Complement Rule (probability that an event doesn't occur): P(A') = 1 - P(A) .
Addition rule: P(A ∪ B) = P(A) + P(B) – P(A ∩ B) .
Multiplication rule: P(A ∩ B) = P(A) × P(B) for independent events. P(A ∩ B)
For both, the persons selected at random are left-handed
10 % out of 100 % are left-handed.
Hence the probability that the person is left-handed
P(L) = 10 /100 = 1 / 10 = 0.1
where P(L) is the probability that the person is left-handed.
Therefore both the persons selected are left-handed
= 0.1 * 0.1
= (0.1)^2
= 0.01
Hence the probability that they are both left-handed is 0.01.
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the density of a certain material is such that it weighs 3 grams per fluid ounce of volume. express this density in ounces per liter.
The density of the material in ounce per liter is 0.1059 ounce per liter.
How to express the density in ounce per liter?The ounce per liter conversion selector on this page selects the density measurement unit to convert to starting from ounces per liter (oz/L).
Given that,
Density = 3 grams per fluid ounce
Convert grams to ounce.
1 grams = 0.0353 ounce
Then
Density = 3 * 0.0353 ounce per fluid grams
= 0.1059 ounce per fluid grams
Convert fluid gram to liter
Density = 0.1059 ounce per 1000 liter
= 0.0001059 ounce per liter
Hence, the density in ounce per liter is 0.0001059 ounce per liter.
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solve the inequality |x +4|-4>0
The inequality form of the given expression is:
x < -8 or x > 0
The interval notation is : (−∞,−8)∪(0,∞)
Given, the expression is |x + 4| - 4 > 0
An inequality is a relationship that shows a non-equal comparison between two numbers or mathematical expressions.
Isolate the variable by dividing each side by factors that don't contain the variable.
⇒ |x + 4| - 4 > 0
⇒ |x + 4| > -4
Remove mod.
⇒ x + 4 > -4 or x - 4 > -4
⇒ x > -4 -4 or x > -4 +4
⇒ x <-8 or x > 0
Hence the internal notation is :
(−∞,−8)∪(0,∞)
The required graph is plotted.
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HELPPPPPPPPPPPPPPPPPPPPPPPPP! whats 1+1
Determine the inverse function of f(x)=1/7x-1/7
The inverse of the function → y= f(x) = 1/7x - 1/7 is -
f⁻¹(x) = 7x + 1.
We have -
y = f(x) = x/7 - 1/7
We have to find its inverse function.
What is the procedure to find inverse of function ?Inverse of a function can be calculated by following the steps mentioned below -
Step 1 - Replace 'y' with 'x' and vice - versa.
Step 2 - Rewrite the equation by solving for 'y'.
Step 3 - Replace 'y' with f⁻¹(x).
According to the question, the equation given is as follows
y = f(x) = x/7 - 1/7
Replace 'y' with 'x', we get -
x = y/7 - 1/7
Now, solve for y -
y/7 = x + 1/7
y = 7(x + 1/7)
y = 7x + 1
Replace 'y' with f⁻¹(x) -
f⁻¹(x) = 7x + 1
Hence, the inverse of the function → f(x) = 1/7x - 1/7 is -
f⁻¹(x) = 7x + 1.
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