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Natalija [7]
2 years ago
9

Help a girl out!! Can you explain how you got the answers as well?

Mathematics
1 answer:
balandron [24]2 years ago
5 0

Answer:

I think its H, 2.5%

Step-by-step explanation:

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What are the values of a and b?
ivann1987 [24]

Answer:

<h2>a = 400/21, b = 580/21</h2>

Step-by-step explanation:

Small triangles are similar. Therefore, the sides are proportional

\dfrac{a}{20}=\dfrac{20}{21}               <em>cross multiply</em>

21a=(20)(20)       <em>divide both sides by 21</em>

a=\dfrac{400}{21}

For b, we can use the Pythagorean theorem:

b^2=\left(\dfrac{400}{21}\right)^2+20^2\\\\b^2=\dfrac{160000}{441}+400\\\\b^2=\dfrac{160000}{441}+\dfrac{176400}{441}\\\\b^2=\dfrac{336400}{441}\to b=\sqrt{\dfrac{336400}{441}}\\\\b=\dfrac{\sqrt{336400}}{\sqrt{441}}\\\\b=\dfrac{580}{21}

3 0
3 years ago
Describe the difference between an angle with a positive measure and an angle with a negative measure.
Lana71 [14]

Answer:

negative is rotating counter clockwise and positive is straight

Step-by-step explanation:

positive 180 degresse rotation

7 0
3 years ago
The quotient of a number and 2 is -3 ?
Vera_Pavlovna [14]
The answer to this is x/2 = 3.
4 0
3 years ago
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There are "Brainly Bots" giving links. Do not click them. You can tell if it says something about an answer with a link to a lin
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Thanks for letting me know! I have been encountering those bots lately when I am looking for an answer to my question. We need more people like you in the community so thanks for letting others know! We appreciate it!!!

3 0
3 years ago
M/J Grade 8 Pre-Algebra-PT-FL-1205070-003
Andreas93 [3]

Answer:

Following are the description of the given course code:

Step-by-step explanation:

The given course code is Pre-Algebra, which is just an introduction arithmetic course programs to train high school in the Algebra 1. This course aims to strengthen required problem solving skills, datatypes, equations, as well as graphing.

  • In this course students start to see the "big picture" of maths but also understand that mathematical, algorithmic, and angular principles are intertwined to form a basis for higher mathematics education.
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3 years ago
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