Answer:
-20
Step-by-step explanation:
Use the distributive property to get
(you multiply both xy and -7 by 2.) Now plug in the x and y values to get:
. This gets you
which is
.
Answer:
3 9/10,64,B,D
Step-by-step explanation:
The cable should be 50 feet.
If you draw the picture, you will see that you have a right triangle.
Let's just use the Pythagorean Theorem to find the hypotenuse (or cable).
30^2 + 40^2 = c^2
2500 = c^2
50 = c
Answer:
314.961
Step-by-step explanation: