A chemist has a 30% and a 45% acid solution. What amount of each solution should be used to make 500ml of solution with 35% acidity?

Four x to the third power plus five x plus ten, divided by two x plus three

2x - 4 (4x - 8) = - 94 solve for x

Equivalent fractions to 1/3

Simplify 12s subtract 2 plus 10s subtract 5 plus 3s

The price of a notebook has dropped to $ 3.30 today. Yesterday's price was $3.80. Find the percentage decrease. Round your answer to the nearest tenth of a percent.

Pasha is thinking of a number such that when twice the number is added to three times one more than the number she gets the same result as when she multiplies four times one less than the number. what number is pasha thinking about?

Solve the equation. -10x + 1 + 7x = 37 Ox = - 15 Ox = - 12 Ox = 12 Ox = 15

Eight people are entered in a race. If there are no ties, in how many ways can the first three places come out?

An item costs $410 before tax, and the sales tax is $28.70. whats the sales rate

How many outcomes are possible if we toss a coin 10 times?