A scientist needs 15 liters of 25% acid solution for an experiment, but she only has a 10% solution and a 35% solution. How many liters of the 10% and the 35% solutions should mix to get the solution she needs?

What is the total cost of 1.9 cubic meters of soil if it sells for $40

Writing algebraic expressions for sequences

What is Y=-3x^2+24x-41 in vertex form

2a=8 A+b=2 Substitution method

What is 17/50 in a percent and decimal

What is the sum of 90 minutes and 50 minutes? 130 minutes 1 hour, 40 minutes 2 hours 2 hours, 20 minutes

The side lengths of triangle RST are 5, 12, and 13. Which set of ordered pairs form a triangle that is congruent to triangle RST?

Write an inequality that represents the description and then solve. Dave has $15 to spend on an $8 book and two birthday cards (C) for his friends. How much can he spend on each card if he buys the same card for each friend?

How many terms are in the arithmetic sequence - 27, - 16, - 5, ..., 292? Hint: a_n=a_1+d (n-1), where a_1 is the first term and d is the common difference

Rachel invested $15,000 in a nine-year CD giving 8.5% interest, but needed to withdraw $4,000 after two years.