When are the clock hands perpendicular

molly was packing books in a box to send to a friend. the box cannot weigh more than 2kg. if each book has a mass of 200g, what is the maximum number of books she can send?

Mrs Acosta travels 44 miles in her car and uses two gallons of gas. If her gas mileage continues at the same rate, how many gallons of gas would she use to travel 528 miles?

X/5 + 6 = 14 solve for the variable

Alicia got 60 questions correct on your science test if she received a score of 75 how many questions were on the test

How to add fractions with unlike denominators?

How does the volume of a sphere with radius 2cm compare to the volume of a sphere with radius 1cm

6 yards to 36 yards. Find the percent of change. Round to the nearest tenth of a percent if necessary.

Mark, evan, and cayla are playing a game. there are 3 blue marbles, 2 red, and 1 green marble. if mark pulls a blue marble he gets $1. if evan pulls a red marble, he gets a $2. if cayla pulls a green marble, she gets $3.

How do you reduce 12/30 by 1/2

Maria's age of 17 years less than Orlando's age. The sum of their ages is 33 find their ages.