Keiko has seven colors of lanyard. She uses three different colors to make a chain. How many different combinations can she choose?

Mira has breakfast at a restaurant. She leaves a 20/%20% tip of / $1.80$1.80. What is the price of Mira's breakfast, before tip?

The mean mark is 70% there are 30 students 20 of which are boys with a mean mark if 62% what is the mean for girls

In how many ways can 5 people be selected from 11 to play on a basketball team

A country has an area of 215 square miles. If the population density of that country is 34.5 people per square miles, what is the population of the country?

Find the height of a cylinder with a volume of 30 in cubed and a radius of 1 in

A sling is being rotated at the rate of 99 rpm. Give each answer as an exact fraction. a) What will the length of the sling have to be so that the speed of the object at the end will be 53 meters per second? (in meters) meters

Simply the expression - 3 (x+3) 2-3+3x. what is the simplified expression in standard form?

Which statement could be used to explain why fx) = 2x - 3 has an inverse relation that is a function? The graph of f (x) passes the vertical line test. f (x) is a one-to-one function The graph of the inverse of f (x) passes the horizontal line test.

1. Subtract the following two polynomials: 3x^2-7x + 2 and 9x^2 + 3x - 8.

Solve for w. 30 = - 6w + 12