Solve x2 – 64 = 0.
1. isolate x2: x2 = 64
2. apply the square root property of equality: 7x2 = 1/64
3. isolate the variable:
0
x =
x=

x = - 8, x = 8

Step-by-step explanation:

Given

x² - 64 = 0 ( add 64 to both sides )

x² = 64 ( take the square root of both sides )

x = ± = ± 8

constant of proportionality = 3 and the equation is c = 3p.

step-by-step explanation:

c = kp   where c = amount of caffeine in mg., p = oz of pepsi and k is the constant of proportionality.

substituting the values given:

24 = 8k

k = 3.

the same value of k will be obtained if we substitute the other given values.