4x + 8y = 20

-4x + 2y = - 30 solve using elimination

A specimen of charcoal found at Stonehenge contains 63% as much Carbon-14 as a sample of present-day charcoal. What is the age of the sample?

Bianca is making scarves to sell. She has 33 pieces of blue fabric, 37 pieces of green fabric, and 41 pieces of red fabric. Suppose Bianca uses 3 pieces of fabric to make 1 scarf. How man scarves can she make?

A chef buys 5.46 pounds of ground turkey to make some casseroles. Each casserole requires 0.13 pound of turkey. How many casseroles can the chef make?

Find the solution to the equations 3x-y=-4 and x+y=0

If h (x) = 5 + x and f (x) = 5, which expression is equivalent to (kn) (x) ?

Solve for x. 3/5x = 15

Is 2.78778777 ... a irational number

On the number line above, the segment from 0 to 1 has been divided into fifths, as indicated by the large tick marks, and also into sevenths, as indicated by the small tick marks.

How many even 4-digit numbers can be formed from the digits 1, 4, 5, 8, and 9 with no repetitions allowed?

Major League Baseball's fastest recorded pitch is 105 miles per hour. The distance between the pither's mound and home plate is 60 feet, 6 inches. How long did it take the ball to travel from pitcher to the batter?