Ax+by=c
what is the answer to this?

How many of the 250 grandparents in the population would you expect to prefer online shopping with merchant a? merchant a: 4 merchant b: 6 merchant c: 2 merchant d: 3 other: 5 none: 5 answer choices: a.about 4 b.about 8 c.about 40 d.about 21

The longer leg of a 30° 60° 90° triangle is 16 times square root of three how long is a shorter leg

In angle pqr find the measure of