Solve the system of equations - 9x - 2y = -3 and -20 – 3y = 7 by combining the equations.
Answers
-9x - 2y = -3 (1)
-2x -3y = 7 (2)
From (1), make new equation, y = (3-9x)/2 (3)
From the new equation (3), substitute the y value into (2). Solve it, and you get the value of x.
Once u get the value of x, substitute it into (3) then you get the value of y.
The step by step solution is in the image below :)
Related Questions
Help find the missing angles?
Answers
Step-by-step explanation:
a=90
e=45
f=45
plzzzz mark me brainliest if it helps you then
Tim is reading a book. On Monday he reads 2 pages. On each day after that, he reads triple the number of pages as the previous day. How many pages did Tim read on Thursday?
Answers
Answer:
Tim read 54 pages on Thursday.
Step-by-step explanation:
Consider the provided information.
Tim read 2 pages on Monday. Each day after that, he reads triple the number of pages as the previous day.
Monday = [tex]2=2[/tex]
Tuesday = [tex]2\times 3=6[/tex]
Wednesday = [tex]2\times 3\times 3=18[/tex]
Thursday = [tex]2\times 3\times 3\times 3=54[/tex]
Hence, Tim read 54 pages on Thursday.
How many pages does Tim read on Monday? 2 pages.
If Tim tripled the amount that he read on Monday, how many pages did he read on Tuesday? 2 × 3 = 6 Pages
Repeat for Wednesday. 6 × 3 = 18 Pages
Repeat for Thursday. 18 × 3 = 54 Pages
simplify 27+2(6+x)
1. 35+x^2
2.39+2x
3.27+12x
4.29+8x
Answers
Answer:
39 + 2x
Step-by-step explanation:
(I’ll give brainilest) help asap
Answers
Answer:
option c: y=9x+0.5
that's the answer!
When
you add 6 to the product of a number and 10, the result is 36. What is the number?
Answers
Answer:3
Step-by-step explanation:
10x+ 6= 36 Subtract six from each side then divide by ten leaves you with three
Answer:
20
Step-by-step explanation:
6+(n+10)=36
n=20
6+(20+10)=36
36=36
A recipe requires 3 cups of flour to make 27 dinner rolls. How much flour is needed to make 9 rolls?Mandy runs 4 km in 18 min. She plans to run in a 15 km race. How long will it take her to complete the race?
Answers
Answer:
a)1 cup of flour
b)67.5 minutes
Step-by-step explanation:
a) A recipe requires 3 cups of flour to make 27 dinner rolls. How much flour is needed to make 9 rolls?
From the above question, we know that:
27 dinner rolls = 3 cups of flour
9 dinner rolls = x
Cross Multiply
27 rolls × x = 9 rolls × 3 cups
x = 9 rolls × 3 cups/27 rolls
x = 1 cup of flour
Hence, 1 cup of flour is needed to make 9 dinner rolls
b) Mandy runs 4 km in 18 min. She plans to run in a 15 km race. How long will it take her to complete the race?
From the above question:
4 km = 18 minutes
15km = x
Cross Multiply
4km × x = 15km × 18 minutes
x = 15km × 18minutes/4km
x = 67.5 minutes
Hence, in a 15km race , it would take her 67.5 minutes to complete her race.
Which graph shows a line with the slope of 3/2?
Answers
Answer:
B.
Step-by-step explanation:
slope = Rise (y difference) / Run (x difference)
B, Rise = 3 run = 2 slope = 3/2
The graph with a line of slope 3/2 is graph B.
What is Slope?Slope of a line is the ratio of the change in y coordinates to the change in the x coordinates of two points given.
Slope can also be defined as the tangent of the angle that the line is making with the positive X axis.
Slope of a line with two points (x, y) and (x', y') on the lines is,
Slope = (y' - y) / (x' - x)
Take any two points from all the three graphs given to find the slope.
A. Two points are (0, 4) and (6, 8)
Slope = (8 - 4) / (6 - 0) = 4 / 6 = 2/3
B. Two points are (0, 0) and (4, 6)
Slope = (6 - 0) / (4 - 0) = 6/4 = 3/2
C. Two points are (0, 2) and (2, 8)
Slope = (8 - 2) / (2 - 0) = 6/2 = 3
Hence the graph B has slope equals 3/2.
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What is/ are the constant(s) in this expression?
3a + 6y + 18ay + 9 - 10
3a and 6y
9 and -10
- 9 and 10
9 and 10
Answers
Answer:
9 and -10 are constant
Step-by-step explanation:
constant means it shouldnt have any variable attached to it
Answer:
3,6,18,9,10
Step-by-step explanation:
numbers
Find the corresponding angles, alternate interior angles, and alternate exterior angles .
Answers
Answer:
94
Step By Step Explanation:
6X8=48
5X7=35
1X3=3
2X4=8
48+35+3+8= 94
48+35=83
3+8=11
83+11=94
94
Which number is a factor of 10, but not a multiple of 2
Answers
Answer:
Five is as 2 x5=10, but it doest come in the table of 2
Step-by-step explanation:
I will mark brainliest for the best answer!!!! Please show FULL SOLUTIONS. THANK YOU.
Question: Determine The Value Of X.
Answers
9514 1404 393
Answer:
x = 78
Step-by-step explanation:
The base angles of an isosceles triangle are congruent, so the sum of angles is ...
x° +x° +24° = 180°
2x +24 = 180 . . . . . collect terms
x + 12 = 90 . . . . . . . divide by 2
x = 90 -12 . . . . . . . . subtract 12
x = 78
_____
Additional comment
The base angle of an isosceles triangle is always the complement of half the third angle. That angle's bisector is an altitude, so divides the isosceles triangle into two congruent right triangles.
help me with this pls
Answers
Answer:
9, -8, 15
Step-by-step explanation:
Equation 1
[tex]5(x+7)-3(x-4)=7x+2 \\ \\ 5x+35-3x+12=7x+2 \\ \\ 2x+47=7x+2 \\ \\ 47=5x+2 \\ \\ 45=5x \\ \\ x=9[/tex]
Equation 2
[tex]4(3x+5)-3=9x-7 \\ \\ 12x+20-3=9x-7 \\ \\ 12x+17=9x-7 \\ \\ 3x+17=-7 \\ \\ 3x=-24 \\ \\ x=-8[/tex]
Equation 3
[tex]\frac{1}{3}(5x-9)=2\left(\frac{1}{3}x+6 \right) \\ \\ 5x-9=2(x+18) \\ \\ 5x-9=2x+36 \\ \\ 3x-9=36 \\ \\ 3x=45 \\ \\ x=15[/tex]
Which of the following equations have no solutions?
Choose all answers that apply:
A
33. 33 = 331 – 25
B
33.: + 33 = 33. - 25
33.25 = 33r - 25
332 + 25 = 33r - 25
Which is no solution
Answers
Answer:
A, B & D
Step-by-step explanation:
Because if you subtract one of the constants from both sides then you should only have equal variables. In other words, both sides have to be identical in this situation.
33x-33= 33x + 25
33x = 33x + 58 No matter what you make x, the right will be 58 bigger than the right so there is no solution.
33x+33=33x+25
33x+8= 33x nope no solution
33x+25=33x+25
33x = 33x both sides identical so there is a solution
33x-25 = 33x +25
33x= 33x+50
Find the output, y, when the input,x, is 6.
y=
Answers
Answer:
y = 8
General Formulas and Concepts:
Algebra I
Reading a Cartesian PlaneCoordinatesFunctionsStep-by-step explanation:
What the question is asking is for the y-value when the x-value is equal. According to the graph, when x = 6, y = 8. Therefore, y = 8.
Answer:
8
Step-by-step explanation:
I got it correct and it is on khan :) I can prove it :D
Somebody help me w this!!!
Answers
Answer:
1/4 !
Step-by-step explanation:
To show -1 + (-6) on the number line, which directions would you move? *
5 points
right one unit, then left 6 units
Answers
Answer:
you would move left once, then left again 6 times. so 7 times to the left.
Step-by-step explanation:
You're moving left because you're working with negative numbers, so -1 would be the first step, and then just move 6 times more to the left. When you work with positives you do the same but to the right.
You will have to move left by 6 units.
What is equation modelling? What is a mathematical equation and expression?Equation modelling is the process of writing a mathematical verbal expression in the form of a mathematical expression for correct analysis, observations and results of the given problem.A mathematical expression is made up of terms (constants and variables) separated by mathematical operators.A mathematical equation is used to equate two expressions.Given is a number line.
The given expression is -
-1 + (-6)
on solving, we get -
- 1 - 6
- 7
You will have to move left by 6 units.
Therefore, you will have to move left by 6 units.
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PLEASEE answer correctly !!!!!!!!!!!!!! Show your workkkkk !!!!!!!!!!!! Will mark Brianliest !!!!!!!!!!!!
Answers
A triangle has 180 degrees. Subtract 62 from 180 to get 118, then divide by 2 to get the two angles on the bottom.
Which triangles legs do not belong with the other three? Explain ur reasoning
Answers
Answer:
The second one.
Step-by-step explanation:
It's not a right triangle.
Answer:
The second triangle
Step-by-step explanation:
The reason is that is doesn't have a 90 degree angle
All the other triangles are right angled triangle except for the second one
Is a = 9 a solution to the inequality below?
8
yes or no
Answers
Determine what shape is formed for the given coordinates for ABCD, and then find the perimeter and area as an exact value and rounded to the nearest tenth.
A (−9, 3), B (−6, −1), C (2, 5), D (−5, 6)
Answers
Answer:
Perimeter = 5 + 5 + 7.1 + 10 =27.1
area = (5 + 10)x5 / 2 = 37.5
Step-by-step explanation:
Slope formula: m = (x' - x)/(y' - y)
m-AD: (6-3)/(-5 - -9) = 3/4 (I'm not detail other Other slopes)
m- BC = 3/4
m-AB = - 4/3
m-AD = m-BC AD // BC (ABCD is a Trapezoid)
m-AB = - 1 / m-BC
AB ⊥ BC
segment length formula: d = √(x' - x)² + (y' - y)²
AD = √(-5 - -9)² + (6 - 3)² = √4² + 3² = √25 = 5
DC = √50 = 7.1
BC = √100 = 10
AB = √25 = 5
Perimeter = 5 + 5 + 7.1 + 10 =27.1
area = (5 + 10)x5 / 2 = 37.5
area ABCD = (5+10)x5 / 2 =
Below, explain why we are allowed the
"substitute in" x - 3 for y in the top equation.
Why is this useful for finding our first solution?
x + y = 11
y = x - 3
Answers
Answer:
because in the bottom eqution it shows us x-3=y therefor we could re-write the top equation as x+x-3=11
Help please!!!!!! :(
Answers
Answer:
2). 2
3). 5
4). 3
5). 6
Step-by-step explanation:
If a = -3, find the value of 3a²
Answers
Step-by-step explanation:
given
a = - 3
3a² = 3 * ( -3) ²
= 3 * 9
= 27
The value of 3a² is 27.
Please help this is due today!
Graph the solution of 1/4x≤2
Answers
Answer:
There isnt even a graph shown to graph on.
Answer:
attached
Step-by-step explanation:
1/4x ≤ 2 same as
x ≤ 8
Number line and 2 dimension graphs
i need help!! i just need the equation that’s all, i’ll give brainliest
Answers
Answer:
(x²-16x)
Step-by-step explanation:
thats all just multiply then
which rational number could be graphed between -4 and -5 a. -5 .5 b. -4.25 c. 4/5 d.4.5
Answers
Answer
C
Step-by-step explanation:
PLEASE ANSWER ASAP WILL GIVE BRAINLIEST.
A football player kicks a ball with a mass of 0.5 kg. The average acceleration of the football was 15 m/s^2. How much force did the kicker apply to the football?
Question 2 options:
15.5 N
7.5 N
30 N
14.5 N
Answers
Answer:
7.5N
Step-by-step explanation:
The equation for force:
F = m * a
where F is force, m is mass, and a is acceleration
F = .5 kg * 15 m/s² = 7.5 N
Need help ASAP. Please answer quick
Answers
Answer:
Energy used, input
Monthly bill, output
Step-by-step explanation:
the bill is affected by how much energy u use
HOPE THIS HELPS!
Brainliest?
Domain
Range
-3
6
5
3
-2.
1
Answers
Domain={-3,5,2}
Range={6,3,1}
Hope this helps
Have a great day/night
A preschool Field trip required seven buses. 13 children rode in cars with their parents and the rest road on a bus. If there were 258 children on the trip to all together, how many were on each bus
Answers
258-13=245
Next:
245/7=35.
Answer: 35 kids on each bus.
Hope this helps. May I have brainliest please? :))))