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jolli1 [7]
3 years ago
13

Tell whether the angles are complementary or supplementary. Then find the value of x.

Mathematics
1 answer:
Paha777 [63]3 years ago
8 0
The angles are complementary meaning they =90 degrees.

So take (x-20) and x, and write this equation,

x-20+x=90

2x-20=90

move the 20 over

2x-20=90
    +20  +20

2x=110

x=55.

You can check it by plugging it back in,

(55-20)=35
and
x=55

35+55=90.

Thus, you know your answer is correct.
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Write ln(x^3y^2) in terms of u and v (picture provided)
Katena32 [7]

Remember the properties of logarithms. If you have ln81, you can pull out the power of two (9^2) and have 2ln9. Also, you could do ln9 + ln9 because 9*9=81 and ln9*9 = ln9 + ln9

With these properties, you can get 3lnx+2lny, which is 3u+2v according to the answer.

Hope I helped!

6 0
2 years ago
What is this answer! (-3)(8)
Vladimir [108]

Answer to question:

-24

7 0
2 years ago
Read 2 more answers
Given qr = 4.8, m angle r space equals space 80 degree , and m angle p equals 42 degree ... if you want to find pq.... a. should
Lady bird [3.3K]

By applying the law of sines, the length of side PQ is equal to 7.1 units.

<h3>What is the law of sines?</h3>

The law of sines is also referred to as sine law and it can be defined as an equation that relates the side lengths of a triangle to the sines of its angles.

<h3>How to calculate the length of PQ?</h3>

Mathematically, the law of sines is given by this equation:

\frac{sinA}{a} =\frac{sinB}{b} =\frac{sinC}{c}

Substituting the given parameters into the formula, we have;

\frac{sin80}{PQ} =\frac{sin42}{4.8} \\\\\frac{0.9848}{PQ} =\frac{0.6691}{4.8}\\\\0.6691PQ = 4.7270\\\\PQ = 4.7270/0.6691

PQ = 7.1 units.

Read more on law of sines here: brainly.com/question/7922954

#SPJ1

4 0
2 years ago
11. Find the value of the expression: -7 + 11 - 6 + 8<br> Your answer
Dvinal [7]
The answer to -7 +11 -6 + 8 =6
6 0
3 years ago
Can somebody explain to me how to do this and the answers and how you got it
yaroslaw [1]
7. Easiest method is substitution.  Since y=x/2, then:
2x+3(x/2)=28
8.Substituting again, we get:
3x-6x=6
-3x=6
x=-2
(-2,6)
☺☺☺☺
6 0
3 years ago
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