Answer:
21x+2
Step-by-step explanation:
You don't know what the value of x is you can't solve the expression
Answer:
92.091
Step-by-step explanation:
81+10=91
.296
+
.795
_____
1.091
So: 91+1.095=92.091
Answer:
-42
Step-by-step explanation:
directly means y = kx where k is a constant. you have to first find the constant.

now you have your equation 
so you simply plug in x and find y

Answer:a
Step-by-step explanation:did