How do I solve x-y=11 2x+y=19

12a - 8 = 11a + 3 (solve for a)

Alexandra has a stand in the marketplace where she sells ground cumin. She has a fixed amount of weekly expenses, and she sells her cumin for $7.20 If she sells 90 kilograms of cumin, her weekly net profit is $ 414.

Marie worked for three months last year. If monthly payments was 1.240.00, 1.620.00, and 1.460.00; what was her average pay per month

What would seven less than the quotient of x and 9 in a an expression?

F a coin is flipped 10 times, what is the probability that it will show all heads or all tails?

A bird flies from the bottom of a canyon that is 59 and three fifths feet below sea level to a nest that is 609 and one fifth feet above sea level. What is the difference in elevation between the bottom of the canyon and the bird's nest?

Nadia needs 3/4 cups of orange juice for punch recipe she will double the recipe to make punch for a party which statement below is true

I need to know how to prove if an angle is congruent or not.

Solve the compound inequality 4 < x - 5 < 12

How to do 1.42 g/cm² to mg/mm²