A chemist needs 18 liters of a 30% acid solution. How much of a 20% solution should be

mixed with a 40% solution to get that (round your answer to the nearest liter) ?

4 liters

5 liters

9 liters

7 liters

Determine the number of significant digits in the measurement. 0.79 cm

Which special quadrilateral is both a rectory and a rhombus?

If hoan was asked to drow a right angke how miny right agnkes are in a right angle

Two investments totaling $ 18,000 produce an annual income of $1370. One investment yields 7% per year, while the other yields 8% per year. How much is invested at each rate?

Juan spent 3/4 of his allowance at the mall. He spent the other 1/4 at the restaurant. If his allowance is 16 how much did he spend at the mall? How much did he spend at the restaurant? How many was left over?

When y is 3 and x is 5 what's the constant of variation

Find the value of c so that (x+1) is a factor of the polynomial p (x). p (x) = 2x^4-5x^2+cx+1

A company ordered 10 boxed lunches from a deli for $74.50. each boxed lunch cost the same amount. which equation represents the proportional relationship between y, the total cost of the nixed lunches and x, the number of boxed lunches? A) 7.

Change the following numbers into percent 0.05

Calculate the discriminant: 5x² + 2x - 2 = 0