A jeweler has five rings, each weighing 18g, made of 20% silver and 80% gold. He decides to melt down the rings and add enough silver to reduce the gold content to 60%. How much silver should he add?

Koby's solution for 4 (x - 3) = x + 2 is shown at the right. Did he solve the equation correctly? Explain why or why not. 4 (x - 3) = 3x + 2 4x - 12 = 1/x + 2 2. (4X - 12) = 2 · (3x + 2 8x - 12 = x + 2 8x = x + 14 7x = 14 x =2

1/2 of 5 less than 10

Brad's bank granted him a single-payment loan of $7500 for 144 days at 7.5% ordinary interest. What is the amount of ordinary interest owed?

Find the next number of this number series! Tip: sum up two numbers and you get the third! 10,12,22,34,56,90, ...

A basketball game starts with a jump ball in the middle of the court with a circle that has an area of 113.04 square feet. What is the radius of the circle?

2p - 1/q = r/q + 4, subject q

Solve the equation using the quadratic formula: 2x^2-5x+2=0

Convert the measurement as indicated 53qt = __ gal __ qt

Which number is the greatest absolute value? Pick an answer: - 12,10,-8, or 6

What is 5 days 6 hours 20 minutes minus 3 days 8 hours 40 minutes