What is the value of r in the equation 4r - 8 = 5r + 12?

-20

-1

1

20

What fraction of 1 L is 1 ml

What does 8x - 3 equal?

During the day, Lola's dog is tied by rope to a tree in the center of her yard. The scale drawing below shows the area that the dog has to run. If the actual length of the rope is 12 1/2 feet, what is the scale used in the drawing?

2/-3 : (-1 2/7) ...

What is 29/11 as a decimal

An airplane travels 2004 km against the wind in 3 hours and 2544 km with the wind in the same amount of time. What is the rate of the plane in still air and what is the rate of the wind in km/h?

Find the center of the circle whose equation is x2 - 10x + y2 - 10y = - 1.

The area of a rectangle is 18 square centimeters. the length is twice the width. what is the width of the rectangle? 3cm 2cm 6cm 9cm

It costs a lumberyard $2.05 per cubic foot of lumber. If they sell the lumber back to their customers for $21.

How many atoms are in 115 grams of calcium