How much water must be added to 12 L of a 40% solution of alcohol to obtain a 30% solution

A value that does not change

Farmer yoy started with 74 habs on his farm. Every hour, he squashed 1 more of them. Farmer umpt started with 54 habs on her farm. Every hour, she collected 4 more of them.

m∠6 is (2x - 5) ° and m∠8 is (x + 5) °. Parallel lines q and s are cut by transversal r. On line q where it intersects with line r, 4 angles are created. Labeled clockwise, from uppercase left, the angles are: 1, 2, 4, 3.

A truck rental company had 32 vehicles on its lot. The company had 20 pickup trucks and the rest were cargo vans. What was the ratio of pickup trucks to cargo vans on the lot? A. 3 to 5 B. 5 to 8 C. 5 to 3 D. 8 to 3

What is 4.16666666 as an improper fraction?

A test consists of 30 problems and students are told to answer any 10 of these questions. In how many different ways can they choose the 10 questions?

3x2 + 14x - 49 = 0 solving the equation by factoring

How many times heavier is a 16 1/2 pound rockthen a 10 1/2 pound rock

Ben has a marble collection. three fifths of the marbles are solid colored marbles. one fifth of the marbles are cats eyes. what fraction of the marbles are either solid colored or cats eyes

Express the solution set of the equation in set notation. x - 2 = 10