Sandy is 15 years older than karen. the sum of sandy's age and karen's age is 69. how old is sandy and karen?

Hannah paid $3.20 for 16 ounces of potato chips. hank paid $3.23 for 17 ounces of potato chips. who paid less per ounces?

Heather is a cashier. she can ring up 1212 customers in 99 minutes. at this rate, how many minutes does it take her to ring up 44 customers?

What is a health benefit of eating protein? a. builds muscles b. provents infections c. increases immunity d. decreases red blood cells