Me im question 1: simplify the following expression: (7x + y) − (5x + 2y). if the final answer is written in the form ax + by, what is the value of b? question 2: simplify the following expression: (8x + 5y) − (2x − 3y). if the final answer is written in the form ax + by, what is the value of b?

In the past, professional baseball was played at the astrodome in houston, texas. the astrodome has a maximum height of 63.4 m. the height of a baseball t seconds after it is hit straight up in the air with a velocity of 45 ft/s is given by h = -9.8t2 + 45t + 1. will a baseball hit straight up with this velocity hit the roof of the astrodome? use the discriminant to explain your answer.

Volume of cylinder with a radius of 8cm and height of 25 cm

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?