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nirvana33 [79]
2 years ago
8

Find and explain wallys mistake!!

Mathematics
1 answer:
Marysya12 [62]2 years ago
5 0

Answer:

What Wally did wrong is that it is supposed to be (4a-5)(a-4)

In order to get -21 a. He was supposed to use negative 5 and 4 to get to negative 21

If he used (4a+5)(a+5)

The answer will be positive 21 and that's not what the problem is asking

Step-by-step explanation:

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Answer:

No, it's not a right triangle.

Step-by-step explanation:

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3. Let's apply the Pythagorean Theorem to see if 5^2 + 12^2 = 18^2

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4. Okay, so the sum of the area of the squares from the two other sides is not equal to the hypotenuse squared, therefore, it's not a right triangle.

(Plus, it's not even a triangle because 7 < x < 17, and the third "side", 18, is not between 7 and 17.)

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3 years ago
7 is not an example of <br> A) a variable <br> B) an expression <br> C) a constant <br> D) a term
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Answer:

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