Twice the sum of a number and negative nine

Jack is 3 times a as old as lacy. 8 years ago the sum of their ages was 25. how old are they now?

What is the product of 9x-9x-1

The mean per capita income is 16,44516,445 dollars per annum with a standard deviation of 397397 dollars per annum.

What it 33/7 divided by 4/6

What tool takes over the task of doing arithmetic functions so that students can focus on higher level mathematics concepts?

Absolute value of - 2

A rope climbing instructor has 3145 meters of rope to divide among 40 students. Each student will get an equal amount of rope. What length of rope does the instructor give to each student? Enter your answer, as a simplified mixed number, in the box.

Granda has 14 red roses and 7 pink roses. How many more red roses than pink roses does she have

An apple orchard sells apples in bag of 10. The orchard sold a total of 2,430 apples one day. How many bags of apples was this?

0ne tank is filling at a rate of 5/8 gallons per 7/10 a seconds tank s filing at rate of 5/9 gallon per 2/3 hour.