HOW do I solve these questions?
5(1+9v)
20b+12
-9/4r=-9/2
Please show how you solved this.

The table shows the balance of a money market account over time. write a function that represents the balance y(in dollars) after t years.

Simplify 24÷(-2)(3)+7 a. -29 b. 3 c. 11

Frank has a devised a formula for his catering business that calculates the number of meatballs he needs to prepare. the formula is m=4a+2c, where c=number of children; m=number of meatballs; a=number of adults. how many meatballs are required for a party of 10 adults and 5 children?