The formula for the area of a square with sides of length x is A = x2 so
x2 = 400 is the equation
This equation has 2 solutions, namely x = ±√400 = +20 or -20
The negative solution does not make sense because a length cannot be less than 0.
The total length needed to go around the painting is the perimeter of the square, which is
P = 4*x = 4*20 = 80 inches
Answer:
$30
Step-by-step explanation:
Just multiply
Answer: (6,2)
Step-by-step explanation:
Replace all occurrences of
y with 2x−10 in each equation.
−x+20=14
y=2x−10
Solve for x in the first equation.
x=6y=2x−10
Replace all occurrences of x with 6 in each equation.
y=2x=6
(6,2)
Point Form:
(6,2)
Equation Form:
x=6,y=2
