Thirteen decreased by a number

What is 31% of 120*31:100

What are the intercepts of the equation 18x - 9y + 3z = 18?

What is the value of 6 in 3.6?

The arcade sells individual tokens for. 25 each. If a package contains 25 tokens, how much would you save by buying a package of 25 tokens instead of 25 individual tokens?

Carly is going shopping to buy cookies. She plans to buy 10 chocolate chip cookies c dollars each, 12 peanut butter cookies at p dollars each, and 8 oatmeal raisin cookies r dollars each.

The Rodriguez family went to dinner at Pasta Palace. Mr. Rodriguez ordered a meal for $6.25; Mrs. R ordered a meal for $7.50; the 2 children ordered individual pizzas for $4.99 each. The sales tax rate was 7.25% and they left a 15% tip.

If people blink about 13 times per minute, how many times do they blink in 7 hours?

Shawn made fudge brownies and peanut butter brownies. Each batch of fudge brownies makes 9 pans. Each batch of peanut butter brownies makes 7 pans. Shawn made 13 batches and ended up with 97 pans of brownies.

Twelve cubic inches of soda are left in a can that holds 20 cubic inches. What percent of the soda has been drunk? What percent of the soda is left in the can?

Is it true that (x+4) = x² + 16? Explain.