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3 years ago

Please take a look at the picture. Please write your answer with an explanation.

Mathematics

1 answer:

emmasim [6.3K]3 years ago

6 0

Answer:

-1

Step-by-step explanation:

We are given the expression:

-5x + 6y - 7y + 4x

With condition x = -3, y = 4

Therefore, substitute x = -3 and y = 4.

-5(-3) + 6(4) - 7(4) + 4(-3)

Recall every important fundamental math such as multiplying with negative.

15 + 24 - 28 - 12

Evaluate:

39 - 40

-1

Alternative solution is to combine like terms first before substitution.

-x - y

Thus:

-(-3) - 4

3 - 4

-1

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