the sum of three numbers is 81. the second number is twice the first, and the third number is six more than the second. find the number

Is 0.8 a rational or irrational number

Alexandra wants to sign up for cell phone service she trying to decide which company she should choose.

The ratio of yellow marbles to green marbles is 5 yellow marbles to 9 green marbles. If there are 18 green marbles, how many yellow marbles are there?

Divide (-7x+x^2+15) / (-3+x)

What is 4574/24 mean

The total volume of two spheres is 10π cubic units. The ratio of the areas is 4:9. What is the volume of the smaller sphere in cubic units?

On a biased dice the probability of rolling a 1 is 0.3 the dice is rolled 150 times how may ones do you expect to roll?

Quinton brought 40 cupcakes to school on his birthday. He gave a cupcake to each of the 18 students in Ms. Delmonts class. He also gave a cupcake to each of the 16 students in Mrs Donnelly's class. He also gave a cupcake to Ms.

michael started a savings account and after 3 weeks, he had $500 dollars, and after 7 weeks, he had $900. What is the rate of change of money in his savings account per week?

Which property is illustrated by the following statement if ABC=DEF and DEF=XYZ then ABC=XYZ