what does a + a equal to

At a restaurant your food bill was 80 dollars and you left a tip for 16 dollars. what percent of the bill did you leave for the tip

How many 18-oz bottles can you full with 252oz of catsup

The histogram represents the distributions of boiling temperatures, in degrees Celsius, of tap water and a mixture of salt water. The standard deviation of the tap water data is 1.129. The standard deviation of the salt water data is 1.107.

Archy bought 15 gallons of gas for $23.85. Joe bought 16 gallons of gas for $24.48. who paid less per gallon?

784:8 estimate Math question

Classify each polynomial by its degree and number of terms. 7/4x+3 5.2x^2-4x=2.5 3/5 0.75x^2

Claire wants to place a mirror that is 1812 inches wide in the center of a wall that is 31 inches wide. How far from each corner should she place the mirror for it to be centered.

Three times the sum of a number and three

18. What value of b will make the equation have no solution? 6x + 4 = 4bx - 2

A circle has a sector with are of (17/2) pi and a central angle of (17/90) pi radians. What is the area of the circle? Either enter an exact answer in terms of pi or use 3.14 pi and enter your answer as a decimal.