Why is number seven prime?

Five laps on a go-cart takes 8 minutes. How long would 6 laps take?

Estimate 782 divided by 50.

Renna pushes the elevator button, but the elevator does not move. The mass limit for the elevator is 450 kg, but Renna and her load of identical packages mass a total of 620kg. Each package has a mass of 37.4kg.

Khianna went shopping for her outfit for a dance at the school. She planned to buy shoes, jewelry, nail polish, makeup, and a dress at the mall. At one store she bought nail polish for $4.79 and makeup for $21.45.

If x=y and y=2 then 3x=

How do i solve this problem? Y=100+50x

What multiplies to 6 and adds to negative 4

How is - 2+3=1 and 3 + (-2) are similar and different?

Write the sum as a mixed number with the fractional part less than one 1 1/6 + 3 3/6

A cyclist rides 6.9 km east for 23 minutes, then he turns and heads west for 7 minutes and 2.1 km. finally, he rides east for 12.6 km, which takes 42 minutes.