A hiker in Africa discovers a skull that contains 32% of its original amount of C-14. Find the age of the skull to the nearest year.

Yup has lunch at a restaurant. if his bill was 14.50 and yup wants to leave a 20% tip, what is the amount he should leave for a tip?

Prime factorization of 1050

1,4,7,10,13 which explains why there are both odd and even numbers in the patter?

A box of national brand cornflakes is $2.09 for 12 ounces. A box of store label cornflakes is $3.09 for 20 ounces.

Solve by substitution - 4x-y=-2, y=-4x+3

A car travels 200 miles in the same time that a train travels 300 miles. The speed of the train is 20 miles per hour more than the speed of the car. Which equation could be used to determine the speed of the car, r, in miles per hour?

A rectangle contains 17 identical grey squares and in the whole rectangle there are 50 squares what percent is the rectangle shaded

Is 18 a polynomial? Explain your reasoning

Simplify the next two expressions 1. 2x + 5 (3x - 2) - 10x - 30 2. 10x - 23 + 40y + 23 - 10 - 2x - 10y

Rita has a collection of 96 coins consisting of nickels, dimes, and quarters. The number of dimes is 2 more than one third the number of nickels, and the number of quarters is twice the number of dimes.