3 years ago

HELP!!!! I need an answer soon, please!!! I will give Brainliest!!!!

Mathematics

1 answer:

sattari [20]3 years ago

7 0

Answer:

180

Step-by-step explanation:

In this drawing I made, I added some variables. a and d are complimentary, meanwhile b and c are complimentary. A straight line is an angle of 180 degrees. Therefore, a + b = 180.

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Step-by-step explanation:

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3 years ago

Solve for a: a(a-3) =100

marissa [1.9K]

$a(a-3) =100\\
a^2-3a-100=0\\
\Delta=(-3)^2-4\cdot1\cdot(-100)=9+400=409\\
\sqrt{\Delta}=\sqr{409}\\
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