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castortr0y [4]
3 years ago
14

K is the midpoint of JL. If JK = 7x + 4 and KL = 12x - 21, what is the length of JL?

Mathematics
2 answers:
Ann [662]3 years ago
7 0
Midpoint means the segments beside it aer equal measure
therefor
JK=KL
7x+4=12x-21
minus 7x both sides
4=5x-21
add 21 both sides
25=5x
divide oth sides by 5
5=x

LJ=2(JK)=2(KL)
find either JK or KL

7x+4
7(5)+4
35+4
39=JK

double taht
39*2=78

JL=78 units
denpristay [2]3 years ago
4 0
JL = KL
7x+4=12x-21
25 = 5x
x=5
JK = 39
KL = 39
JL = 78
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Let's assume the frequency of sound be f and wave length is w.

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stich3 [128]

Answer:

<em>n = 8 or n = −2</em> <em>is the correction solution.</em>

Step-by-step explanation:

As the absolute value equation is given:                                      

                                            | n−3 | = 5

We know either n − 3 = 5 or n − 3 = −5

                                               n − 3 = 5            (First Possibility)

                                          n − 3 + 3 = 5 + 3

                                                       n = 8

                                                n − 3 = -5            (Second Possibility)

                                                      n = -5 + 3

                                                      n = -2

                  <em> So, n = 8 or n = −2</em> <em>is the correction solution.</em>

<em>Keywords: absolute value equation</em>

<em>Learn more about absolute value equation from brainly.com/question/680309</em>

<em>#learnwithBrainly</em>

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2^2×20

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