If x=2,y=3 and z=4 find yz÷x 10x+7xz​

What is the best way to answer questions with a x expression in the question. for example 3x + 10x=?

Out of 50 students surveyed, 16 have a dog. based on these results, predict how many of the 280 students in the school have a dog.

Which graph represents the linear function below? y-3=1/2(x+2)