Which equation combines with the given equation to form a system of equations with the solution x = 3 and y = 9? x + 2y = 21

How many tenths are in four fifths

Can you calculate unit rate given larger quantities (ex. 6 apples for $3.60)

The circumference of a circle is doubled. By what factor is its area increased?

The elimination method works when the equations are in what form

Amir stands on a balcony and throws a ball to his dog, who is at ground level. The ball's height (in meters above the ground), 3 seconds after Amir threw it, is modeled by h (x) =

There were 632 animals gathered at the river. A herd of 187 elephants and 266 zebras left the river area. How many animals were still at the river?

Use the distance formula to write an equation of the parabola. focus: (0,2) directrix:y=-2

Write 0.78 repeating as a fraction is simplest form,

Claire jogs around an oval track and is able to complete one lap in 5 minutes. If she jogs at the same pace for 42 minutes, how many laps would she be able to jog? Write an inequality and find the number of whole laps Claire completesm

What is the next number in this pattern? 0, 3, 15, 63