Show an equation and a solution for the problem. arnold needs a 25% solution of nitric acid. he has 20 milliliters (ml) of a 30% solution. how many ml of a 15% solution should he add to obtain the required 25% solution?

What is the absolute value of the complex number -4-sqrt2i

Secant ac and bd intersect at point e inside f what is the measure of aed if measurements cd equals 30 a b is 50 and cb is 170

In a young single person's monthly budget, $150 is spent on food, $175 is spent on housing, and $175 is spend on other items. suppose you drew a circle graph to represent this information, what percent of the graph represents housing?