When solving a system of equations, how do you determine which method to use?

The perimeter of a rectangle is 160cm. The rectangle is 4 times longer then wide. What are the length and width of this rectangle

Find the upper quartile of this set of ordered data to the nearest whole number. 21 25 25 29 34 38 45 49

Which of the following is the best estimate for the capacity of a can of soda? 12 c 12 pt 12 gal 12 fl oz

All the sides of a hexagon become three times the original length. find the ratio of areas of the new and old hexagons.

A jar contains 100 jellybeans. There are 38 blue jellybeans, 25 green jellybeans 4 red jellybeans and 33 yellow jellybeans. What is the probability of randomly selecting a red jellybean?

Catherine is considering two new cell phone plans. She doesn't want to spend more for minutes she won't use. One plan allows up to 250 minutes per month for $49, and the other plan allows up to 350 minutes per month for $65.

What is the value of the variable that makes the statement true? a + (-7) + 3=0 A. - 4 B.-3 C. 4 D. 7

Bonny Blair of the United States set a world record in speed skating when she skated 5.00 x 10' m with an average speed of 12.92 m/s. Suppose Blair crossed the finish line at this speed and then skated to a stop.

The table below shows the values of y for different values of x: x y 0 0 1 8 2 16 3 24 Which equation shows the relationship between x and y? A. x = 8y B. y = 8x C. y = 8 + x D. x = 8 + y

What is 25 percent of 100