hector is five years less than double mary's age. Mary is 12 years old. how many years old is Hector?

Simplify the fractions below 3/4 + 2/3 7/8 - 2/3 3/5 • 1/3 4/7 • 2/3

For which data set is a linear regression most reasonable? A. a set of nine data pairs with a correlation coefficient r = - 0.4 B. a set of five data pairs with a correlation coefficient r = 0.3 C.

On a multiple choice test with 17 questions, each question has four possible answer, one of which is correct. For students who guess at all answers, find the mean for the number of correct answers. a. 12.8 b. 8.5 c. 4.3 d. 5.7

Use the formula C = 2πr and find the circumference of a circle with radius 3 in. Use π = 3.14.

4. Find the value of x that makes the equation - 2 (3 - x) = - 4x + 12 true.

Solve using cross multiplication method, ax + by = a^2; bx + ay = b^2

The U. S. - based motorcycle manufacturer says that it expects to build 134,000 motorcycles this year, up from 123,000 last year. Find the percent of increase in production

Which equation is an identity a; - 3y 3=-3y-6b; 3w 8-w=4w-2 (w-4) c; 9 - (2v 3) = - 2v-6d; 7m-5=8m 7-m?

What is the measure of the angle labeled (5x + 42) °?

The area of a rectangular wall of a barn is 96 square feet. its length is 4 feet longer than twice its width. find the length and width of the wall of the barn?