Answer:
x = 12
length = 4 cm
width = 20 cm
Step-by-step explanation:
a = lw
Plug in the givens
80 = (x - 8)(x + 8)
Multiply
80 = x^2 - 64
Add 64 to both sides
144 = x^2
Take the square root of both sides
x = ±12
(The negative root is extraneous since the dimensions can not be negative)
x = 12
length = x - 8 = 4 cm
width = x + 8 = 20 cm
Answer:
Step-by-step explanation:
We will be using 2 properties of radicals in this simplification (outlined below).
<em>Let's simplify this:</em>
First answer choice is right.
Answer:
28.75 or 28 3/4
Step-by-step explanation:
This equation is made for Long Division:
115/4
4 cannot go into 1 evenly.
4 can go into 11, 2 times.
4x2=8
11-8=3
4 can go into 35, 8 times.
35-32=3
Add a zero at the end, then divide 4 into 30.
4 goes into 30, 7 times.
30-28=2
Add another zero, then divide again.
4 goes into 20, 5 times.
20-20=0
So, after you hit an even number you can stop dividing and put in your answer.
28.75
Answer:
-1/2
Step-by-step explanation:
pass (0,1) (2,0)
slope = rise/run = -1/2
