Answer:
linear function: y = -7x + 150
Step-by-step explanation:
Scott's situation represents a linear function because he is spending $7 each day on lunch. His initial amount in his bank account is $150 and each day he spends the same rate on lunch, $7. So, for any amount of days - represented by 'x' in the equation, you would multiply by -7 (since he is spending) and subtract this amount from his original amount of $150. In this equation, 'y' is equal to his total after 'x' amount of days.
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The answer should be A the first one
They aren't equivalent
<h2>Explanation:</h2>
In order to determine whether the expression:

is equivalent to:

Genevieve needs to follow these steps:
Step 1. Get rid parentheses

Step 2. Combine like terms

Step 3. Solve

So:

Therefore, these two expressions aren't equivalent.
<h2>Learn more:</h2>
Writing expressions: brainly.com/question/13894833#
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Substitute y=4x to the second equation:
x^2 + (4x)^2 = 17
x^2 + 16x^2 = 17
17x^2 = 17
x^2 = 17/17
x^2 = 1
x = 1 and -1
When x=1, y=4(1) = 4
When x=-1, y=4(-1) = -4
Thus the solutions would be (1,4) and (-1,-4). That would correspond to D. and A.