For chemistry lab you use to ounces of calcium 2.5 pounds of copper and 1/4 pound of nickel what was the combine we have your materials in pounds and ounces

Rewrite the equation by completing the square 4x^2 + 28x + 49=0

Mary is three times as old as her son. In 12 years Mary will be twice as old as her son. How old is each of them now?

How many 1/8 lb packages of fudge can be sold from 7 pounds of fudge?

Lithium has 3 protons. how many neutrons are in the isotope lithium-8?

What is the greatest common factor of 73, 47, 74, and 79?

Argot is sewing a ribbon on a seam along the perimeter of a square pillow. The side length of the pillow is 2x2 + 1 inches, and its perimeter is 4 (2x2 + 1) inches. If x = 3.5, how much ribbon does she need?

6.4*10³+5.2*10³ how to solve this?

Mr. Boll can pick a bale of cotton by hand in 5 days. If his son joins him in the work, they can pick a bale in 3 days. How long would the son take to do the job?

Becky works 16 days each month. how many days will she work in 6 months

Which relationships hold true for the sum of the magnitudes of vectors u and v, which are perpendicular? a. ||u+v||=||u||+||v|| b. ||u+v||=sq rt (||u||^2+||v||^2) c. ||u+v||