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olga nikolaevna [1]
3 years ago
9

Given 10k -4 =2k-20 prove k=-2

Mathematics
2 answers:
xeze [42]3 years ago
8 0

Answer:

10k-4=2k-20

     +4       +4

10k=2k-16

-2k  -2k

8k=-16

\frac{8k}{8}=\frac{-16}{8}

k=-2

Check:

10(-2)-4=2(-2)-20

-20-4=-4-20

-24=-24  

Step-by-step explanation:

RoseWind [281]3 years ago
3 0

Answer:

10.k-4=2.k-20

10k-2k=-20+4

8k=-16

K=-2

Step-by-step explanation:

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Part A The measure of ∠AFC is 120°, and the measure of ∠BFC is 95°. Which equation can you use to find the measure of ∠AFB? 120°
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Answer:

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Step-by-step explanation:

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Random sample size of 81 are taken from an infinite population whose mean and standard deviation are 200 and 18, respectively. T
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Answer:

the  mean and standard error of the mean are 200 and 2 respectively.

Step-by-step explanation:

Given that ;

the sample size n = 81

population mean μ = 200

standard deviation of the infinite population σ = 18

A population  is the whole set of values, or individuals you are interested in, from an experimental study.

The value of population characteristics such as the  Population mean (μ), standard deviation (σ) are said to be known as the population distribution.

From the given information above;

The sample size is large and hence based on the central limit theorem the mean of all the means is same as the population mean 200.

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