What is the value of 3ab + 5b - 6 when a=-1 and b=3

Brent and Lance leave a park on bicycles traveling at constant rates in opposite directions. After 2.5 hours, they are 85 miles apart. If Lance bikes 2 mph faster then Brent, how fast is Lance biking?

Damon is shooting 2 free throws. The probability that Damon will make a free throw is 80%. What is the probability that he will make both free throws? Express your answer as a decimal rounded to the nearest hundredth.

the state where you live has a 6% sales tax. If you purchase a car for 9800 what will you pay including tax this is two step problem

Mark and his brother signed up for the Catch Up phone plan. They share the minutes every month equally. How many minutes can Mark use each day without going over his share of minutes?

Do not round your answer. Type in the number with the decimal. 15% of 25 is

The population of a town is 20,000 and is decreasing at a rate of 5% per year. What is the population after 23 years?

Is 1/9 equal, less, or greater than 1/3?

A 12 ft ladder is leaning against a building. The ladder makes a 45 degree angle with the building how far up is the building does the ladder reach

9x-4y=-7 7x-12y=39

Amanda is 3 years older than Brantley and Carlos is twice as old as Amanda. The sum of their ages is 57. How old is Amanda?