Solve and explain

8-1/4n>20

Step-by-step explanation:

add 8 to both side

so it is -1/4n>28

so we know that the denominator of 28 is 1

so multiply -1 by 1 and 4n by 28

It will look like this:

-1>112n

then divide both side by 112

the answer is n<-1/112 or 0.0089285

the monthly balance will be $75,000

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