What are the terms in the question 18xy+3x+7

Add the fractions, and simply the result to lowest terms. 2/3 + 2/7= ?

Azookeeper predicted the weight of a new baby elephant to be 233 pounds when it was born. the elephant actually weighed 265 pounds at birth. what was the percent error of the zookeeper's prediction? asap

If f(x)=x/2-3 and g(x)=4x^2+x-4, find (f+g)(x)