Answer:
39. r = 13.4
40. m = 12
Step-by-step explanation:
39. Given the equation, 
, to solve for r, the following are the correct steps to take to arrive at the solution:
(given)
Add 0.8 to both sides of the equation (addition property of equality)
(this is where the error occurred.)
40. The correct steps to take in solving the equation, 
is as follows:
(given)
Multiply both sides by 3 (multiplication property of equality)
(this is where the error occurred. This is what we should have at this line/step)
(dividing both sides by -1)
(x`-b/2a)-D/4a
(x`-7)+576
answer! (7;-576)
Answer:
1. a=85.8 c=89.2
2. x=29.7 8x=2937. 3
Step-by-step explanation:
2. 8x+x+27°+66°=360°
8x+x=360°-66°-27°
9x=267 >Then divide both sides with 9
x=<u>29</u><u>,</u><u>666666</u><u>.</u><u>.</u><u>.</u>
<u> </u><u> </u>
=8X
=8 (29,66666...)
=237,333...
1. 6X+4X+32°=180°
10X=180°-32
10X=148° >divide both sides with 10
X=14.8
A=6x c=4x+32
=6(14.8) =4(14.8)+32
= 88.8 =91.2
I believe the answer is C
<h3>
Answer: Choice G (lower left corner)</h3>
Why is this? Recall that (x-h)^2+(y-k)^2 = r^2 is the general template of a circle. The center being (h,k) and the radius is r.
For the equation (x-4)^2+(y+2)^2 = 16, we have a center of (4,-2) and radius 4. Note that 4^2 = 16.
The graph of choice G shows these properties so that's why it's the answer. Keep in mind that each tickmark represents 2 units. Choice I is close since the center is correct but the radius is too small.
