Answer:
13
Step-by-step explanation:
|-20| = 20 (anything with | | is absolute value, which is always positive), |7| = 7, 20 - 7 = 13.
quick tip: when you see something like -|#|, that would be negative, but if you saw |-#|, it would be positive.
hope it helps lol
Answer:
k = 3.5
Step-by-step explanation:
You need to divide all the numbers.
21/6 = 3.5
24.5/7 = 3.5
28/8 = 3.5
31.5/9 = 3.5
So, the answer is 3.5.
<h3>
Answer: Second choice. (-5,4)</h3>
Point A is located at (5,4)
To reflect over the y axis, we flip the sign of the x coordinate while keeping the y coordinate the same. The rule is 
So we will have
as the location of A'
Answer:

Step-by-step explanation:
The red graph is the blue graph translated 1 unit down, so the answer is A.
The common way of transforming the general form to the standard form is by using the completing the square method. But there is also a neat shortcut to knowing the h, k and r values right away.
The general formula is:
x²+y²+Dx+Ey+F = 0
x² + y² + (-2h)x + (-2k)y + (h²+k²-r²) = 0
Solving for h:
-2h = 42
h = -21
Solving for k:
-2k = 38
k = -19
Solving for r:
-47 = (-21)² + (-19)² - r²
r = √849
Standard form of given circle is:
(x+21)² + (y+19)² = 849
Answers:
1) B
2) B
3) B
4) D