Which of the following equations is not a function? a.) 5y^2 = x

b.) 1/2y + 9 = x^2 + 2x + 1

c.) y = 1/2x + 9

d.) 8x + 4y = 0 ​

Asquare and an equilateral triangle have the same perimeter. each side the triangle is 4 inches longer than each side of the square. what is the perimeter of the square

Identify the function that contains the data in the following table: x     -2         0         2         3         5     f(x)     5         3         1         2         4     possible answers: f(x) = |x| + 1 f(x) = |x - 2| f(x) = |x - 2| - 1 f(x) = |x - 2| + 1

What is the missing justification in the proof of the pythagorean identity below, sin^2x+cos^2x=1, using a right triangle?