What is the value of a in the equation 5a-10b=45, when b =3?

3
15
21
39

Liam's parents are driving three times as fast as liam is biking, but they left later than he did. if his parents caught up with him two hours after he left, how much later than liam did they leave?

Deshawn uses 3/4 of a box of rice to cook dinner the portion he uses weighs 12 ounces right and solve an equation to find the weight of the full box of rice

If x = -2, then x 2-7x+10 equals a. 0 b.20 c.28