Don't guess! I will mark brainliest if its correct!
Don't answer if you don't know!
Also no links!

C

Step-by-step explanation:

1. Plug 7/8 into the expression:

4(7/8)

2. Multiply:

4 * 7/8 = 28/8 = 3.5

3.5 < 4

D is correct

Step-by-step explanation:

C is incorrect.  7/8 is incorrect because a fraction that isn't greater than a whole will result in the whole number becoming more than itself. In this case, the number 4 will become more if it is mutiplied with a fraction less than one. Multiply the numbers

B is also incorrect. It'll equal 4 8/17

A is also incorrect, it equals 9/ 2, 8 1/2.

x = ±sqrt(10)

step-by-step explanation:

5 - 2x² = -15

subtract 5 from each side

5-5 - 2x² = -15-5

-2x^2   = -20

divide by -2 on each side

-2x^2   /-2= -20/-2

x^2 =10

take the square root on each side

sqrt(x^2 )=±sqrt(10)

x = ±sqrt(10)

check:

5 - 2x² = -15

+sqrt(10)

5 - 2(sqrt(10))² = -15

5 -2(10) = -15

5 -20 = -15

-15 = -15

-sqrt(10)

5 - 2(-sqrt(10))² = -15

5 -2(10) = -15

5 -20 = -15

-15 = -15