How to rewrite an expressions with negative exponents so that the exponent is positive?

What times what equals 12 but still equals 11? the equation is 5n to the 2nd power + 19+12

Write 0.1 as a percentage

16.24 divided by 0.14

Mr. Richards' class is holding a canned food drive for charity. Juliet collected 10 more cans than Rosana. Santiago collected twice as many cans as juliet. If they collected 130 cans altogether, how many cans did juliet collect?

Your food costs are $1700. Your total food sales are $8500. What percent of your food sales do the food costs represent? What I think: 20%

You and a friend buy two fruit smoothies and leave a tip. You split the total and your half cokes to 3.60. What percent tip (in decimal form) did you and your friend leave if the fruit smoothies cost $3 each?

Terry deposit of $520 into your bank account that run simple interest each year after five years she had earned $156 in interest if no money was deposited into or withdrawn from the account what was the annual interest rate

Solve the system of equations by elimination. 2x-y+3z=-12x-y+3z=-1 x+2y-4z=-1x+2y-4z=-1 y-2z=0y-2z=0

Change 0.56 radians into degrees and minutes.

Evaluate 4P3 24 7 10 12