Which ratios form a proportion? Use cross products to test each pair.

A. 15/40, 35/90

B. 18/22, 45/55

C. 15/55, 33/121

D. 17/31, 32/45

What is the value of r? 4r + 19 What is the length of segment EF? units 9r-6 18r + 3

What is the center and radius of the equation (x + 3) 2 + (y + 5) 2 = 49?

10 1/4 pounds - 8 3/4 pounds = ? ounces

What is the fraction notation of 0.0356

There are 27 red or blue marbles in the bag the number of red marbles is five less than three times the number of the blue marbleshow many red marbles are in the bag and how many blue marbles are in the bag

A red blinking light blinks every 18 seconds, while a yellow blinking light blinks every 12 seconds. If both lights start at the same time, after how many seconds will they next blink at the same time? A) 6 B) 18 C) 36 D) 54

Use slopes to determine if the triangle whose vertices are left parenthesis negative 3 comma 3 right parenthesis , left parenthesis 2 comma 4 right parenthesis , and left parenthesis 4 comma 0 right parenthesis is a right triangle.

Solve the quadratic equation for x. What is the product when the roots are multiplied? (x + 2) 2 = 1 A) - 3 B) - 6 C) - 9 D) 3

What is 9+594,327= I just was wondering?!!

Consider the function represented by the equation 6q = 3s - 9. Write the equation in function notation, where q is the independent variable. f (q) = 2s + 3 f (q) = 2q + 3 f (q) = 1/2q-3/2 f (s) = 1/2s-3/2