Im assuming that is what your asking, you worded it a little differently. When you figure out what the value of something is based on the power it is raised to, you multiply that number by itself the amount of the exponent.

1/4 x 1/4 x 1/4 = 0.015625

5 0

3 years ago

How do you solve 90% of 20?

Marizza181 [45]

All you would do is multiply .9 by 20
.9*20=18

90% of 20 is 18

3 0

3 years ago

The sum S of the first n integers is given by the formula S=1/2n(n+1). How many integers must be taken to have a sum of

statuscvo [17]

Answer:

Step-by-step explanation:

We require to solve for n, hence

$\frac{1}{2}$ n(n + 1) = 325

multiply both sides by 2 to eliminate the fraction

n(n + 1) = 650

n² + n = 650

subtract 650 from both sides to have equation in standard form

n² + n - 650 = 0 ← in standard form

(n + 26)(n - 25) = 0 ← in factored form

equate each factor to zero and solve for n

n + 26 = 0 ⇒ n = - 26

n - 25 = 0 ⇒ n = 25

however, n > 0 ⇒ n = 25

5 0

3 years ago

Solve each system of equations. Equation 1: x+3y=-5 Equation 2: 9x+3y=3

bekas [8.4K]

Answer:

Equation 1: x-3y+5=0

Equation 2: 3x+y-1=0

Step-by-step explanation:

Equation 1: x+3y=-5

x+3y+5=-5+5

x=3y+5=0

Equation 2: 9x+3y-3=0

3x+y-1=0

4 0

3 years ago