Answer:

Step-by-step explanation:
Let's solve for C.

Step 1: Flip the equation.

Step 2: Add
to both sides.


Step 3: Divide both sides by
.


Answer:

A) 51, assuming this is a *right* triangle:
38^2+34^2 = 50.99^2, rounding 51!!
The mid point is 15 because it is in the middle of 10 and 20
-48a÷ 8 can be written as,

Put a=1 in the above exprression and solve.

Therefore, the solution is -6.