Janelle has 10 marbles, ralph has 13 marbles, and jennifer has 17 marbles. use mental math to determine the total number of marbles janelle, ralph, and jennifer have. a.37 b.23 c.30 d.40

Liz is shipping a package to her friend.the maximum weight of a medium flat-rate box is 20 pounds,including the box which weighs 6 ounces.write and solve an inequality to describe the possible weight ,w, of the contents that liz will ship to her friend if she must use a medium flat-rate box.

What is the answer to this question? i'm a bit stumped. also how do i do it? 5(x - 4) = 2(x + 5)

Can someone explain to me how to do