Last month, Raul bought 6 used books for $7.50. This month he bought 8 used books for $10.00. What is the constant of proportionality between the cost and the number of books bought?

A. 0.75

B. 1.25

C. 2

D. 2.5

The graph represents the feasible region for the system: y<=2x x + y<=45 x <=30 Minimize the objective function P = 25x + 20y. The minimum value = ? and occurs when x = ? and y = ?

Interquartile range of 62, 63, 63, 70, 73, 70, 79, 83, 84, 90,91

What is 2/3 divied by 3 in fraction form

Which of the following expressions could be interpreted as "a number times negative seven added to five equals two"? x - 7 + 5 = 2 5 + 7x = 2 -7x - 5 = 2 5 - 7x = 2

The line width of a tool used for semiconductor manufacturing is assumed to be normally distributed with a mean of 0.5 micrometer and a standard deviation of 0.05 micrometer. What is the probability that a line width is greater than 0.

Find three consecutive integers whose sum is - 54

The two spheres above have the same center one has a radius of 2 cm and the other one has a radius of 3 cm approximately how much space in between the two spheres

What mixed fractions can you get to 22

Two less than 5 times a number is the same as the number plus 6

What of the following best describes the relationship between developing nations clean water and human health