Question

Gaira was asked to evaluate the algebraic expression -3.8x + 6 when x = -7.5.

-3.8(-7.5) + 6(-7.5)
28.5 + (-45)
(-16.5)

What mistake did she make? What is the correct answer?​

Answer 1

Answer:

Gaira made a mistake when substituting the value –7.5 in for x. She multiplied both terms of the expression by –7.5 when she should have only multiplied –3.8 by –7.5. The correct answer is 34.5.

Step-by-step explanation:

Answer 2

Answer:

In the algebraic expression -3.8x +6 when x = -7.5,

Gaira multiplied both the terms with x which was the mistake she made

And the correct answer is 34.5

Step-by-step explanation:

In the expression, -3.8x + 6, we have to multiply the value of x only by -3.8

But here, Gaira multiplied x by -3.8 and 6 which was the mistake she made

The correct answer is :

-3.8 x + 6 when x is -7.5

-3.8*(-7.5) +6

= 28.5 + 6

= 34.5

So, the correct answer is 34.5