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2 years ago

Please help with maths question thank youu

Mathematics

1 answer:

NARA [144]2 years ago

4 0

3d.79480km thats the answer i think

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Please help! I will chose Brainlist! Thank you!

N76 [4]

Step-by-step explanation:

12.5 ×25

312.5

plz make me brainliest

6 0

3 years ago

The standard IQ test is designed so that the mean is 100100 and the standard deviation is 1515 for the population of all adults.

Natalija [7]

Answer:

The sample size should be approximately 151.

Step-by-step explanation:

We are given the following in the question:

Population mean, μ = 100

Population standard deviation, σ = 15

We have to evaluate the sample size, n.

Alpha, α = 0.10

Confidence interval:

$\mu \pm z_{critical}\frac{\sigma}{\sqrt{n}}$

Putting the values, we get,

$z_{critical}\text{ at}~\alpha_{0.10} = \pm 1.64$

$100 \pm 1.64(\frac{15}{\sqrt{n}} ) = (98,102)$

$100 \pm 1.64(\displaystyle\frac{15}{\sqrt{n}} ) = (98,102)\\\\1.64(\frac{15}{\sqrt{n}} ) = 2\\\\n = 151.29 \approx 151$

Thus, the sample size should be approximately 151.

6 0

3 years ago

May someone help me with this?

lozanna [386]

Segment WT and DG are congruent which means that the shape and size, but we are allowed to flip, slide or turn. In this example the shapes are congruent (you only need to flip one over and move it a little). Angles are congruent when they are the same size (in degrees or radians). Sides are congruent when they are the same length.

5 0

3 years ago

In the graphic below, ARV = ENV by:

GREYUIT [131]

The ans should be ASA because angle AVR is equal to angle EVN (opposite angles equal)

8 0

3 years ago

1/2x = -40<br> What is x?

Sonbull [250]

Answer:

x = -80

Explanation

-40 divided by 1/2 is -80

5 0

3 years ago

Read 2 more answers

Please help with maths question thank youu​

Please help with maths question thank youu