A teacher can finish grading papers 15 hours before a student can. If a teacher and her student work together to grade papers, they can finish in 4 hours. How many hours would it take for a student to grade all the papers on his or her own?

Ben is 30 years old and daniel is 2 years old. how many years will it take until ben is only 333 times as old as daniel?

A ladder is leaning against the side of a house. If the ladder is 12 feet tall and it is reaching 8 feet vertically on the house, how far away from the house is the base of the ladder (in feet) ?

What is the anwser to this problem? area of complex shapes Khan Academy

In a school election, 3/4 of the students vote. There are 1464 ballots. Write an equation using s as the variable to represent the total number of students.

Which of the following is not a real number a. square root - 4 b. square root 16 c. square root 1 d. square root 13

felipe is training to run a marathon. today he ran 24 miles in 2.5 hours. at what rate did felipe run today?

Wolfrich lived in Portugal and Brazil for a total period of 14 months in order to learn Portuguese. He learned an average of 130 new words per month when he lived in Portugal, and an average of 150 new words per month when he lived in Brazil.

Each morning papa notes the birds feeding on his bird feeder. So far this month he has seen 59 blue jays, 68 black crows, 12 Red Robins ad 1 cardinal. What is the probabilityof a blue jay being the next bird papa sees A 0.421 B 0.59 C 0.059 D 0.042

What is the value of this expression when b=5 6 (2b-4)

Guillermo bought some reams of paper for $5 each and a $200 printer. He spent a total of $450. Write and solve an equation to find the number reams of paper Guillermo purchased