Katalina is solving algebraic expressions for her math homework. She solves the problem 7y -12, when y = 3. Katalina says that the answer is 61. Is she correct? How do you know?

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

Identify the initial amount a and the growth factor b in the exponential function. a(x)=680*4.3^x

Noel is hoping to make a profit (in $) on the school play and has determined the function describing the profit to be f(t) = 8t – 2654, where t is the number of tickets sold. what does the number 8 tell you?