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kirza4 [7]
2 years ago
9

SOMEONE EASE ANSWER NUMBER 4?

Mathematics
1 answer:
nlexa [21]2 years ago
5 0

On analyzing the question we can say that the angle ∠JKM of the triangle ΔJKL would be 42 as line MK bisects ∠JKL into ∠JKM & ∠MKL.

From the question it follows that line MK bisects angle ∠JKL into ∠JKM & ∠MKL where M is the point in the interior of ∠JKL.

Therefore, as we have given  m∠JKL = 84 & m∠MKL  = 42

and we have to find m∠JKM , we will simply write the equation as follow

m∠JKL = m∠JKM + m∠MKL

Inserting values we get,

84 = m∠JKM + 42

m∠JKM = 42

Hence, angle m∠JKM  of the triangle ΔJKL is  42.

Learn more about questions related to triangles and their angles here

brainly.com/question/13273388

#SPJ9

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A church window consisting of a rectangle topped by a semicircle is to have perimeter p . find the radius of the semicircle if t
Y_Kistochka [10]

Answer:

r=\dfrac{p}{4+\pi}

Step-by-step explanation:

Let r be the radius of the semicircle, then 2r is the width of the rectangle. Let y be the length of the rectangle. The perimeter of the window consists of two lengths, one width and length of semicircle, then

p=2y+2r+\pi r.

Express y:

y=\dfrac{p-2r-\pi r}{2}.

The area of the window is

A=y\cdot 2r+\dfrac{1}{2}\pi r^2.

Substitute y into the area expression:

A=\dfrac{p-2r-\pi r}{2}\cdot 2r+\dfrac{1}{2}\pi r^2=pr-2r^2-\pi r^2+\dfrac{1}{2}\pi r^2=pr-2r^2-\dfrac{1}{2}\pi r^2.

Find the derivative A':

A'=p-4r-\pi r.

Equate A' to 0:

p-4r-\pi r=0\Rightarrow r=\dfrac{p}{4+\pi}.

When r then A'>0 and the function A is increasing, when r>\dfrac{p}{4+\pi}, then A' and the function A is decreasing. This means that at point r=\dfrac{p}{4+\pi} the function A takes it maximal value (the area is maximal).

7 0
3 years ago
4(x)+9(2x+1) when x= 2 5/8
ikadub [295]
The answer is 66.75

I would suggest multiplying 2 in (2x+1) by 2 5/8 first, then multipling 4 by 2 5/8. This will garner you 10 and 5.25. Distribute the 9 into the (). You'll then get 10.5+47.25+9
Add and you will get 66.75
3 0
3 years ago
Read 2 more answers
Nina took an exam. When her results came, she had 40% correct and 68% incorrect. Find the percent to correct answers to incorrec
vivado [14]

Answer: She had 27.2% correct.

Step-by-step explanation: To find the percent, we can divide the part and whole then multiply the quotient by 100. After that we'll need to convert the percent to a decimal. In mathematical terms, the formula will be,

\frac{part}{whole}=quotient*100

40% will be the part and 68% will be the whole.

<u><em>Step 1.</em></u>

Convert 40 into a decimal by dividing it by 100.

40 ÷ 100 = 0.4

<u><em>Step 2.</em></u>

Multiply 0.4 by 68.

0.4 × 68 = 27.2

Hence, she had 27.2% correct.

8 0
3 years ago
Please help me with this!
notsponge [240]

Answer:

I dont know if I can answer if I don't have more information then the question

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Find q. Write your answer in simplest radical form.
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Answer:

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Step-by-step explanation:

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