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Kazeer [188]
3 years ago
13

Solve using double substitution y=x-7 y=-2x+8

Mathematics
1 answer:
Ivenika [448]3 years ago
8 0

Answer:

(5, -2)

Step-by-step explanation:

x - 7 = -2x + 8

add 2x to both sides

x - 7 + 2x = -2x + 8 + 2x

3x - 7 = 8

Add 7 to both sides

3x - 7 + 7 = 8 + 7

3x = 15

3x = 15

x = 5

y = 5 - 7

y = -2


Solution (5, -2)

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Answer:

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Step-by-step explanation:  See annex ( two different cubes)

We have a square piece of cardboard of  3 inches wide

Let  x be lenght of side to cut in each corner

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V (max)  = 2 ft³

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