Ella simplifies (4b+4r)+(-2b-r) and says the result is b + 5r. what error did ella make?

When a formula is solved for a particular variable, several different equivalent forms may be possible. if we solved a=1/2bh for h, one possible correct answer is h=2a/b . which one of the following is not equivalent to this? a. h= 2(a/b) b. h= 2a(1/b) c. h= a/1/2b d. h= 1/2a/b

Segment xz is bisected by point y. if xy = 12x, and the measure of xz = 18x – 6, solve for x

Zahra runs a 500-meter race at a constant speed. which graph shows her distance from the finish line during the race?