What is the value of a in the equation 5 a minus 10 b equals 45, when b equals 3?

3

15

21

39

Kendra bought a shirt for $31.75 and a skirt for $29.99. How much change did she receive if she paid with a one-hundred dollar bill?

4n+6+n-2 what is the equivalent expression

A local restaurant, a couple ordered two dinners for $12.50 each and two drinks for $1.50 each. if the couple left an 18% tip, what was the total cost of the meal? a $16.52 b $25.15 c $28.18 d $33.04

A rectangular horseshoe pit is 53 inches long and 32 inches wide what is the area of the horse shoe pit

V3x5v=3v=5 - 13.151x3 15i? - 1-36

Nancy is baking a cake. The recipe calls for seven cups of flour and three cups of sugar. She already put in 1/2 a cup of flour. How many more cups of flour does she need to add? Write your answer in decimal form.

george is driving at an average speed of 62 miles per hour. write an expression that would give his distance traveled for h hours. Make a table that records his distance for 3, 5.5., and 8.5 hours

There were 145 children that went to the park today and 60% of the children were boys. How many of the children were girls at the park? A. 58 B. 85 C. 87 D. 232

Does anyone know the answer to this question w (t) = 3t-1; t=4.2

Evaluate the following expressions for r = 13. a) (8 + r) x 3 b) 5r + 97