What is the measure of the acute angle formed by the lines 3x–5y=–15 and 4x+2y=7?

Suppose sat writing scores are normally distributed with a mean of 497 and a standard deviation of 109. a university plans to award scholarships to students whose scores are in the top 2%. what is the minimum score required for the scholarship? round your answer to the nearest whole number, if necessary.

Solve for n? [tex]z = \frac{3}{4} mn[/tex]

Me. i can't figure out this question. give an explanation too. .