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scZoUnD [109]
3 years ago
12

How many solutions does y=-7x+8 y=-7x-8 have?

Mathematics
2 answers:
OLga [1]3 years ago
6 0

Answer:

no solutions

Step-by-step explanation:

Given the 2 equations

y = - 7x + 8 → (1)

y = - 7x - 8 → (2)

Substitute y = - 7x - 8 into (1)

- 7x - 8 = - 7x + 8 ( add 8 to both sides )

- 7x = - 7x + 16 (add 7x to both sides )

0 = 16 ← not possible

This indicates the system has no solutions

viktelen [127]3 years ago
5 0

Hey there!

The answer to your question is no solutions

To solve this, we will set the equations equal to eachother. We know that since the two expressions, -7x+8 and -7x-8 both equal y, then the expressions are equal. (Somebody comment what property that is, I forgot what it's called) So:

-7x+8=-7x-8\\

Add 8 to both sides:

-7x+16=-7x

Add 7x to both sides:

16 = 0

Therefore, there are no solutions.

Have a terrificly amazing day!

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