Solve the equation

a+3 = (2a+7) / r

after that take r=9

Mrs. Cortez is giving allowance to her children. She has a total of x dollars to give out to her three children. Each child will receive the same amount of money. write an expressions that can be used to determine the allowance for each child?

Is - 4.08 greater than or less than - 4.7

Graph the solution set of the system of inequalities or indicate that the system has no solution. x^2 + y^2 ≤ 49 5x + 4y ≤ 20

What percentage is equivalent to 3/20

What is the product? (-20+5) (58-65) 10 - 1004+17025-652 0-1004 + 170452-652 0-1004-7025-652 0-1004 + 17025+652

How to know if the number is a perfect square

Andy claims that his bird can do single-digit multiplication. He shows the bird 12 cards with simple multiplication problems that are either correct or incorrect. The bird correctly identifies the correctness of the card 9 times out of 12.

Eight and 1/6 divided by 2 and 1/4

A total of 488 tickets were sold for the school play. They were either adult tickets or student tickets. The number of student tickets sold was three times the number of adult tickets sold. How many adult tickets were sold?

Which of the following are the coordinates of the vertex of y=3x^2+3?