If triangle PQR~STU
Find the value of x.

Ten times the square of a non-zero number is eqaul to ninety times the number

Afrequency table of grades has five classes (a, b, c, d, f) with frequencies of 3, 13, 14, 5, and 3 respectively. using percentages, what are the relative frequencies of the five classes?

How do you find percent change? ? i will give brainliest for the bestme i don’t understand