Please help it’s a very important test (Marking as brainliest if fast correct answer)

B. 7/9 and 0.7

Step-by-step explanation:

Since 7 is inside the box that means 7 is being divided by 9 so 7/9, which eliminates C and D.

Since there are infinite more 0s in 7.000, there will be infinitely more 7s when you continue to try and divide. which means there must be a little line above the 7 in the 0.7, so the answer is B

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

idk

step-by-step explanation: