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3 years ago

2 is 3 more than 5 times a number divided by 4

Mathematics

1 answer:

Lady_Fox [76]3 years ago

7 0

I have nooo clue the problem doesn’t make sense

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How to simplify 3x-1

Murljashka [212]

Answer:

9×2

Step-by-step explanation:

(-3x)2=-3x×-3x=9×2

5 0

3 years ago

Read 2 more answers

Which of the following mixed numbers is equivalent to 12.1 6 ?

Sliva [168]

Well, you don't have any options.
But a mixed number for 12.16 would be 12 4/25. Hope it helps! :)

7 0

3 years ago

Read 2 more answers

A population is estimated to have a standard deviation of 9. We want to estimate the population mean within 2, with a 99% level

cupoosta [38]

Answer:

The sample required is $n = 135$

Step-by-step explanation:

From the question we are told that

The standard deviation is $\sigma = 9$

The margin of error is $E = 2$

Given that the confidence level is 99% then the level of significance is mathematically evaluated as

$\alpha = 100-99$

$\alpha = 1 \%$

$\alpha = 0.01$

Next we will obtain the critical value $\frac{\alpha }{2}$ from the normal distribution table(reference math dot armstrong dot edu) , the value is

$Z_{\frac{\alpha }{2} } = Z_{\frac{0.05 }{2} } = 2.58$

The sample size is mathematically represented as

$n = [ \frac{Z_{\frac{\alpha }{2} } * \sigma }{E} ]^2$

substituting values

$n = [ \frac{ 2.58 * 9 }{2} ]^2$

$n = 135$

3 0

3 years ago

Solve x/10 = -7 A. x = 3 B. x = -0.7 C. x = -17 D. x = -70

timofeeve [1]

Answer:

x = -70

Step-by-step explanation:

x/10 = -7

Multiply each side by 10

x/10*10 = -7*10

x = -70

7 0

3 years ago

PLZ HELP ILL MARK YOU BRAINLIEST

NARA [144]

Answer:

D. 89°

Step-by-step explanation:

On the line segment "C," 89 degrees is shown in one corner. x is directly across from it, therefore being the same degrees

7 0

3 years ago