Find the domain and range of the following functions:
a. f: ℝ → ℝ by f(x) = −x2 + 2
b. f: ℝ → ℝ by f(x) = 1 / x + 1
c. f: ℝ → ℝ by f(x) = √4 − x
d. f: ℝ → ℝ by f(x) = |x|
e. f: ℝ → ℝ by f(x) = 2x+2

The length of a rectangle is x times the square root of 100. the width is one-half y more than three-halves x. given that the area of the rectangle is 125 cm2, which equation could represent the rectangle in terms of x and y? a) 5xy − 15x = 125 b) 5xy + 15x = 125 c) 15x2 − 5xy = 125 d) 15x2 + 5xy = 125

Factor the expression using the gcf. the expression 21m−49n factored using the gcf

What’s 8y+48 and factor each expression completely