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Alex_Xolod [135]
2 years ago
8

2x-3y=7 and y=3x-7 how do you solve this using subsitution

Mathematics
1 answer:
adell [148]2 years ago
4 0

2x-3y = 7~~~....(i)\\\\y = 3x -7~~~....(ii)\\\\\\\text{Substitute}~ y = 3x -7~ \text{in equation (i):}\\\\\\2x-3(3x-7) = 7\\\\\implies 2x -9x + 21 =7\\\\\implies  -7x = 7 -21\\\\\implies -7x = -14\\\\\implies x = \dfrac{-14}{-7} = 2\\\\\\\text{Substitute x = 2 in equation (ii):}\\\\y=3(2) -7 = 6 -7 = -1\\\\\\\text{Hence (x,y) =(2,-1)}

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The volume of a cube depends on the length of its sides. This can be written
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Answer:

Step-by-step explanation:

The given question is that the volume of a cube depends on the length of its sides.This can be written in function notation  as v(s). What is the best interpretation of v(3)=27.

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According to the question the volume of a cube depends on the length of its sides. According to the statement we will apply the formula of volume of a cube.

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In this question we have given s=3ft.

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8 0
3 years ago
23 over.30 ÷20 over 24
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Remark

Don't try and do this all at once. Break it down, otherwise you'll have layers and brackets all over the place.

Step One

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