Question

The difference of the square of a number and three times the sum of the number and 7 is more than the product of that number and 15.

Select the inequality that can be used to determine the unknown number.

A.
x2 - 3x + 21 > 15 + x
B.
x2 + 3x ≥ 15 + x
C.
x2 - 3x + 7 ≥ 15x
D.
x2 - 3x - 21 > 15x

Answer 1

c hope this helps btw im

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Answer 2

D

Explanation:

square of a number =x²

3 times the sum of the number and 7= 3(x+7)

their differences=x²-3x-21

more than product of number and 15= >15x

so x²-3x-21>15x