5 The system of equations at the right

shows x by itself on the left side of

one equation. Solve the system by

substituting for x instead of for y.

x=-y-2

0.5x+y=1

Two cars are 261 miles apart and travel toward each other on the same road. They meet in 3 hours. One car travels 3 mph faster than the other. What is the average speed of each car?

How to write 11/20 13/20 6/10 13/25 14/20 as a decimal

What is 2 = f - 27.

The number of concert tickets sold doubles every hour. After 12 hours, all of the tickets are sold. After how many hours are about one-fourth of the tickets sold. Explain your reasoning.

A cube is 125 cubic meters. what is the length of each edge V=lwh

George said that 6*10 (to the 3 power) is 180. Do you agree or disagree? If you disagree, explain the mistake that he made and find the correct answer.

Suma a patru numere este 600. Primul numar este cu 12 mai mare decat al doilea si cu 12 mai mic decat al treilea. Stiind ca al patrulea reprezinta un sfert din suma primelor trei numere, afla cele patru numere

What are three ratios equvilent to 8:20

Multiple binomials by polynomials problem (2+3w) (w^2+6w+9)

A tree is 3, 212 years old. how can you express this age in scientific notation with the lowest level of precision. a. 3x10 to the 3 power b. 3.2 x 10 to the 3 power c. 3.21x 10 to the third power d. 3.212x 10 to the 3 power