Joey has a bag containing 3 quarters, 2 dimes, 4 nickels and 1 penny. He randomly chooses 1 coin, replaces it, and randomly chooses another. What is the probability that he will grab a dime and then a nickel?

Evaluate the expression for the given value of the variable 7a - 4a for a =8

Agroup of students want to create a garden. they do not know the exact measurements but they propose using a variable to represent the length and width of the garden. the length of the garden is 10 feet longer than double the width. use a single variable to write algebraic expressions for both the length and width of the garden. write an algebraic expression for the area of the garden. use mathematical terms to describe this expression.

Two cyclists 84 miles apart start riding toward each other at the same. one cycles 2 times as fast as the other. if they meet 4 hours later, what is the speed (in mi/h) of the faster cyclist?