Combine like terms to simplify the expression:

1.3b+7.8-3.2b

Stan invested $17,000, part at 17% and part at 15%. If the total interest at the end of the year is $2,650, how much did he invest at each rate?

10 to 15 simplified

For a chemistry lab, you used 2 ounces of calcium sulfate, 2.5 pounds of copper, and 1 4 lb of nickel. What was the combined weight of your materials?

What is a tessalation

Simplify (2x 4) (x-2)

Semi annually means how many times a year?

Gary walked 1 1/2 km to school, then 750 m to his job, then 1 km home. How many kilometres did he walk altogether?

The highest paying job will always be the best true or false

Evaluate 1/-5ab if a=3/7 and b=5/8 write in simplest form

Libby is fencing in a playground. She has studied her budget and come up with two options she can afford: Option 1: a triangle with base length 9 meters and height 12 meters. Option 2: a rectangle with length 10 meters and width 8 meters.