A class is attended 21 boys and 15 girls. Write the ratio of girls to students in the class as a fraction in lowest terms

How to multiply 3x3 by 3x3 matrices

when you reverse the digits in a certain 2 digit number you decrease its value by 81 what is the number if you sum of its digits is 9?

Length in the right triangle 7cm 10cm

The ball game begins at 2pm. It takes ying 30 minutes to get to the ballpark. At what time should ying leave home to get to the the game 30 minutes before it starts

Where do they intersect on a graph f (x) = 4x-3 and f (x) = 9x-13

What is 4.41 times 10 to the negative second power

Write 492,053 in expanded form

Sixty people are invited to a party. There are 24 cup in a package and 18 napkins in a package. What is the least number of packages of cups and napkins that can be bought if each party guest get one cup and one napkin?

When x = - 3 then y =

7. Multiply the binomials: (x - 9) (x + 2) a. x^2 - 7x - 18 b. x^2 - 11x - 18 c. x^2 - 7x + 18 d. x^2 + 7x - 18