1.2m=8.4 inverse operation

m = 7

Step-by-step explanation:

1.2m = 8.4

m is being multiplied by 1.2

to get m alone, we do the inverse operation to multiplication which is division.

Divide both sides by 1.2

1.2m/1.2 = 8.4/1.2

m = 7

m=7

Step-by-step explanation:

8.4/1.2=7

u bout ugly as   a mf

step-by-step explanation: lol

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