Is my bill was $20 what should I leave as a tip

In a pet store, 13 of the rabbits for sale are brown and 16 of the brown rabbits have spots. Which fraction of the rabbits in the store are brown with spots?

A system of equations is shown below: x + 3y = 5 (equation 1) 7x - 8y = 6 (equation 2) A student wants to prove that if equation 2 is kept unchanged and equation 1 is replaced with the sum of equation 1 and a multiple of equation 2, the solution to

tina is saving to buy a notebook computer. she has two options. the first is too put $200 away initially and save $10 every month. the second option is to put 100 away initially and save 30 every month.

A college theater charges $5 handling fee. tickets cost $58. what would the slope be

There were 300 more cards sold during June than in July and 400 less cards were sold during April compared to July.

Ella is making 3 batches of banana milkshake she needs 3/4 gallon of milk for each bath. Her measuring cup holds 1/4 gallon. How many times will she needs to fill the measuring cup to make all 3 bathes of milkshake.

1 fifth of 50% ...

What is the answer to 6 (x + 2) - x = 4 (x + 4) + 7

A store pays $3for a magazine. The mark up price is 5%

How do you couculate Pi? So I can continue to find the number by hand. I'm trying to beet my classmates in who can get highest but I don't know how to find the numbers.