Alloys C and D are composed of metals X and Y in the ratios 6:3 and 5:7 respectively by weight. How many kg of X must be melted along with 30 kg of alloy C and 65 kg of alloy D so as to produce a new alloy containing 50% by weight of X?

How to simplify (2√5) ²

Why does the fact family for 81 and 9 have only two number sentences

John drives 10 1/2 miles every 1/20 hour. how many miles can he drive in 5 hours?

Dustin has a spinner that is divided into five equal-size sections colored red blue orange white and green. What is the probability that Dustin spins pink on the next spin? A. 0 B. 0.25 C. 0.5 D. 0.75

dragon sushi charges $12 for 8 pieces of the same type of sushi roll. Yukis steakhouse charges $15 for 12 pieces of the same type of sushi roll. Ana wants to buy 24 pieces of sushi for her family. She decides to compare the prices per piece.

If a circle has circumference 100pi units, what is it's area

If your total is $19.48 and the tax is $9.25 what is the total amount

Find the EXACT value of sin (A-B) if sin A = 15/17, cos A = 8/17, sin B = 3/5, and cos B = 4/5. sin (A-B) =

The tuition at a certain college was $18320 last year. if the tuition increased by 5.1% from last year to this year, determine the tuition this year

Which one of the following statements is true? Compare. 98 and. 980 using (,=)