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earnstyle [38]
2 years ago
9

How do you solve 2x-3y=-4 and x=7-3y by substitution?

Mathematics
1 answer:
Evgesh-ka [11]2 years ago
7 0

Answer:

(1, 2)

Step-by-step explanation:

We can solve this system using substitution.

In this case, we can substitute 7-3y for x, as they are of equal value.

Therefore...

2x-3y=-4\\2(7-3y)-3y=-4\\14-6y-3y=-4\\14-9y=-4

Subtract 14 from both sides:

-9y=-18

Divide both sides by -9

y=2

Now, substitute 2 for y to solve for x:

x=7-3y=7-3(2)=7-6=1

Therefore the solution to this system of equations is:

(x, y)=(1, 2)

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SashulF [63]
This is the concept of trigonometry, we are required to calculate the number of floors the building has given the information above;
# floors=[height of the building]/[height of each floor]
height of each floor=17 ft
let the height of the building be,h.
h is given by;
tan theta=opposite/adjacent
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thus
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thus the number of floors will be:
425.35/17
=25.020≈25 floors


8 0
4 years ago
What is the slope of a line that is parallel to the line represented by the equation x – y = 8?
Zina [86]
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5 0
4 years ago
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3 years ago
Analyze the scatterplot below, what prediction can you make about the group of students used in the study from the graph below?
SCORPION-xisa [38]

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Step-by-step explanation:

8 0
3 years ago
a square green rug has a yellow square in the center. The side of the yellow square is x inches the width of the green band that
Bingel [31]

Answer:

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Step-by-step explanation:

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