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2 years ago

Please explain urgent! Brainly to anyone who can answer!

Mathematics

1 answer:

Wittaler [7]2 years ago

7 0

Answer:

JK ≈ 6.86 units

Step-by-step explanation:

According to the diagram MK is the angle bisector of ∠LMJ in the triangle LMJ.

Use angle bisector theorem, which states:

an angle bisector of an angle of a triangle divides the opposite side into two parts that are proportional to the other two sides of the triangle.

Applied to the given triangle, the ratios are:

LK/JK = LM/JM

Use segment addition postulate and substitute known values to get:

(LJ - JK)/JK = LM/JM
(14 - JK)/JK = 50/48
50JK = 48(14 - JK)
50JK = 672 - 48JK
50JK + 48JK = 672
98JK = 672
JK = 672/98
JK = 6.86 (rounded)

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Simplify. (-2)^-3 A.-8 B.-1/8 C.1/8 D.8

DiKsa [7]

ANSWER

${( - 2)}^{ - 3} =- \frac{1}{ 8}$

EXPLANATION

We want to simplify;

${( - 2)}^{ - 3}$

Recall that,

${a}^{ - m} = \frac{1}{ {a}^{m} }$

${( - 2)}^{ - 3} = \frac{1}{{( - 2)}^{ 3}}$

We multiply out to get,

${( - 2)}^{ - 3} = \frac{1}{{- 2} \times - 2 \times - 2}$

${( - 2)}^{ - 3} = \frac{1}{ - 8}$

The correct choice is B.

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3 years ago

A medical researcher says that less than 87â€‹% of adults in a certain country think that healthy children should be required to

Lyrx [107]

Answer: It is not enough evidence to support the researcher's claim.

Step-by-step explanation:

Since we have given that

n = 500

$\hat{p}=0.85$

So, the hypothesis are as follows:

$H_0:\hat{p}$

So, the z value would be

$z=\dfrac{\hat{p}-p}{\sqrt{\dfrac{p(1-p)}{n}}}\\\\z=\dfrac{0.85-0.87}{\sqrt{\dfrac{0.87\times 0.13}{500}}}\\\\z=\dfrac{-0.02}{0.015}\\\\z=-1.33$

At α = 0.05

z= -1.64

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3 years ago

Express 235° in radian measure

likoan [24]

Answer:

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Step-by-step explanation:

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3 years ago

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LenKa [72]

Answer:

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Step-by-step explanation:

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3 years ago

Given this system of equations with three unknown variables, what is the value of C?

mina [271]

This is basically a system of 3 linear equations with variables x, y and c.

x+y = 6...................................(1)

5x/3 + y = c .........................(2)

2y = c-4x .............................(3)

(2)-(1)

5x/3-x +y-y = c-6 => 2x/3 = c-6 => x = (3/2)(c-6)=3c/2-9 ..............(4)

(3) - 2(2)

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=> 2x/3 = -c

=> x = -(3/2)c.............................................................................................(5)

Finally, equate (4) & (5) to get

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3 0

3 years ago

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