How many friday the 13ths are there in a year?

The bookstore at suntan U Had a sale on school t shirts. Thursday they sold 45 of the marked down t-shirts for a total of 406.50. If the womens shirts were on sale for 9.25 and the mens shirts were on sale fore 8.

Nancy drove 110 km using 13.5 liters of gas. what was her gas mileage in miles per gallon?

Nat used the expression 3 x s to find the cost of 3 shirts. What is the value of expression if s = $16?

What is 421-0.31? Any answer will do.

Five t-shirts sold for $60. Tom used the five-step problem-solving plan. After completing the solve step, how much did he find the cost of each shirt to be?

What is the margin of error for a yes/no survey of 200 people with a proportion of 65% who answered "yes"? a. + 03.37% b.+05.06% c.+06.75% d.+08.43% e.+010.12%

If 19 chairs cost $57.27 what is the cost of 1 chair

What expression is equivalent to 4/7+1 1/3

I don't know how to do cross products

What is the result of converting 1500 yards to miles