7x - 3y + 12z This is algebra and I'm really bad at it

There are 18 players on the baseball team. Of these players 1/3 are girls. How many girls play on the baseball team?

Miguel spent $6 on fast food. Then he spent $3 on ice cream. After buying some comic books, he had $9 left, which was one third of what he originally had. How much money did Miguel have originally? Use the backward strategy.

Show how you can use distributive property

3w + 6 (w - 4) = 156, what does w equal?

Rewrite 3x + 4y = 10 using function notation

How many five-letter codes can be made if no letter can be used twice? (There are 26 letters in the alphabet.)

How to prove using basic definitions, If xy=xz then y=z

Some species of hummingbirds appear to hover in mid-air by flapping their tiny wings 85 times per second. How many times do their wings flap in one minute?

The area of a square is 25 square units how many units is a diagonal of the square

If there are a number of different sounds being produced simultaneously, the resulting intensity is the sum of the individual intensities. How many decibels louder is the sound of quintuplets crying than the sound of one baby crying?