Answer:
c = 74
d = 122
a = 58
b = 48
Step-by-step explanation:
C: a triangle always equals to 180, so 48 + 58 - 180 = 74
D: Angels next to each other on a line always equal to 180, so 180 - 58 = 122
A: Alternating interior angles of a parallel line equal to each other, so it would also be 58
B: A line is 180, so C + A - 180 = B, 74 + 58 - 180 = 48
Answer: a's value is (6,8) B is (-3,7), and C is (-7,-2)
X2-8x+21 = x² - 8x + (8/2)²- <span><span>(8/2)²</span> + 21
</span>
<span>= (x² - 8x + 16 ) - 16 + 21
= (x - 4)²+ 5
</span>
6x4=24 so b will be ur answer
Brainliest pls :D