Pennies used to be made of copper and zinc and had a mass of 3.1g today pennies are made of copper plated zinc and have a mass of 2.5 G. A new pennies mass is what percent of an old pennies mass?

Each lap around the track is 400 meters. How many meters does someone run if they run x laps?

Use a number line to find the absolute value of - 3 and 3

3. AGE Justine is 13 years younger than her uncle Stewart. Stewart is 18 years older than Justine's sister, Hana. Hana's mother is 8 years older than Stewart, and 28 years older than her youngest child, Jared.

Zach has $9.50 and plans to purchase songs from Itunes. Each song he wants to purchase is $1.25. He needs to make sure he has $5.75 left over for the app he wants to buy. Write and solve an inequality to see how many songs Zach can buy

2.) Sam bought 16 gallons of gasoline. There are approximately 3.8 liters in 1 gallon. Which measurement is closest to the number of liters of gasoline Sam bought? Beters in galon. Which

A circular garden with a radius of 4 ft is planted in the center of a 10-ft square. The part of the square that is NOT the garden is covered with small rocks. What is the area of the region covered with small rocks

What present of 60 is 12?

Complete the solution of the equation. find the value of y when x equals 0. - 8x+8y=-16

The Square root of 20 lies between what two numbers

Use the distributive property to remove the parentheses. Simplify your answer as much as possible. 3/4 (3--16)