If j = 7 and k = -3, find the value of 2(j + k)^2.
options
16
64
32
36
explain! it's not 64 and i don't know what i did wrong? !

The ratio of wooden bats to metal bats in the baseball coach’s bag is 2 to 1. if there are 20 wooden bats, how many metal bats are in the bag?

Can you me with this question? i'll reward *30 points i just need with this one question so that i could solve the others. * edit: i originally set up the question to reward 30 points, but for some reason i can only reward 15. if you don't get 30, then i'm sorry. i'm still kind of new to this site

Simplify. (-3ab^3)^4 a. -7ab^12 b. -12a^4b^7 c. -81a^4b^7 d. 81a^4b^12