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Serhud [2]
2 years ago
5

Find the value of x A.)20 B.)55 C.)70 D.)38

Mathematics
2 answers:
lord [1]2 years ago
8 0

Answer:

Hello! answer: x = 20

Step-by-step explanation:

This is a complementary angle meaning it will add up to 90 degrees so...

20 × 4 = 80 80 - 10 = 70

70 + 20 = 90 therefore x = 20

Alex Ar [27]2 years ago
4 0

Answer:

A.) 20

Step-by-step explanation:

These angles are complementary meaning they add up to 90°.

4x - 10 + x = 90

5x - 10 = 90

5x = 100

x = 20

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6 0
2 years ago
I know its easy but i suck at math pls help
e-lub [12.9K]

Answer:

-6.8125

Step-by-step explanation:

Convert 13/16 to a decimal.

Write -6 down

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3 0
3 years ago
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The equation of the regression line is Y = 76 + 2x. Which of the
balandron [24]
None of those are shown on the graph.
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3 years ago
A circle has an area of 78.5 square inches. What is the radius of the circle?
Rainbow [258]

Answer:

\sqrt{24.98732606  Decimal Form:

4.99873244

Step-by-step explanation:

geometry is the worst. but i have a way to remember how to find the area. (Apple Pies are too --> A=πr^2 --> area = pie×radius^squared) so basically you sub in 78.5 in for area and then you solve for r.

Hope i helped kinda lol

6 0
3 years ago
Classify the solutions of 3/x+5+1/5=2x+5 as extraneous or non-extraneous
dedylja [7]
It's <span>extraneous. I know this because it leads to a straight answer. 
</span>
<span><span><span><span>3x</span>+5</span>+<span>15</span></span>=<span><span>2x</span>+5</span></span><span><span><span><span>
26x</span>+15</span><span>5x</span></span>=<span><span>2x</span>+5</span></span>
<span><span><span>26x</span>+15</span>=<span><span>10<span>x2</span></span>+<span>25x</span></span></span><span><span><span><span>
26x</span>+15</span>−<span>(<span><span>10<span>x2</span></span>+<span>25x</span></span>)</span></span>=<span><span><span>10<span>x2</span></span>+<span>25x</span></span>−<span>(<span><span>10<span>x2</span></span>+<span>25x</span></span>)
</span></span></span>
−10x2+x+15=0<span>
x=<span><span><span>−b</span>±<span>√<span><span>b2</span>−<span><span>4a</span>c</span></span></span></span><span>2a</span></span></span><span>
x=<span><span><span>−<span>(1)</span></span>±<span>√<span><span><span>(1)</span>2</span>−<span><span>4<span>(<span>−10</span>)</span></span><span>(15)</span></span></span></span></span><span>2<span>(<span>−10</span>)</span></span></span></span><span>
x=<span><span><span>−1</span>±<span>√601</span></span><span>−20</span></span></span><span><span>
x=<span><span>120</span>+<span><span><span><span><span>−1</span>20</span><span>√601</span></span><span> or </span></span>x</span></span></span>=<span><span>120</span>+<span><span>120</span><span>√601</span></span></span></span><span>
x=<span><span>120</span>+<span><span><span>−1</span>20</span><span>√601
</span></span></span></span><span>
x=<span><span>120</span>+<span><span>120</span><span>√601</span></span></span></span>
<span><span>x=<span><span>120</span>+<span><span><span><span><span>−1</span>20</span><span>√601</span></span><span> or </span></span>x</span></span></span>=<span><span>120</span>+<span><span>120</span><span>√<span>601

Hoped I helped!</span></span></span></span></span>
7 0
3 years ago
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