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3 years ago

Help ASAP! Marking Brainliest ;if you answer and explain

Mathematics

1 answer:

Agata [3.3K]3 years ago

6 0

The answer is 9/16, you first need to multiply 1/4 by itself because it has an exponent if 2 giving you 1/16. You then need to have both denominators the same and you can convert 5/8 to 10/16 and it is still the same value, 10/16 - 1/16 will give you 9/16.

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What are the missing coordinates? My teacher said it was (h-m,n), but I’m saying it is (h+m,n). Could anyone help?

antiseptic1488 [7]

Answer:

<u>You are right, the coordinates are</u>:

$(h+m,n)$

Explanation:

Here is how you can proove that you are right.

Note that m is the x-coordinate of the point $(m,n)$ . Since this point is to the left of the y-axis, it is a negative number, but the negative sign is included in $m$ .

The distance from $(m,n)$ to the y-axis is not $m$ but $-m$ .

That is the same distance from the point with the missing coordinates to the point (h,0).

Then, the missing x-coordinate is $h-(-m)=h+m.$

Of course, there is not doubt about the y-coordinate: it is n, because the point with the missing coordinates is at the same height as (m,n).

Hence, the missing coordinates are x = h+m, and y = n: (h + m, n).

3 0

2 years ago

Divide 30 by it's half, add the half of 18 that has been divided by the half of the half of 12 after been divided by half.

WARRIOR [948]

Answer:

We want to divide 30 by it's half.

The half of 30 is 30/2 = 15

then we have: 30/15 = 2

Now we want to add the half of 18, that has ben divided by the half of the half of 12 hafter been divided by half.

The half of 12 is 12/2 = 6

the half of the half of 12 is 6/2 = 3

now, we wanto to divide the half of 18 by that number.

The half of 18 is 18/2 = 9

then we have 9/3 = 3

and we wanted to add this to the number previous found:

2 + 3 = 5

6 0

3 years ago

given that<img src="https://tex.z-dn.net/?f=%5Csqrt%7B250%7D%20%3D5%5Csqrt%7B10%7D%20and%20%5Csqrt%7B490%7D%20%3D%207%5Csqrt%7B1

Oksanka [162]

Answer:

√250 - √490

= 5√10 - 7√10

= -2√10

3 0

3 years ago

A man wins £7500 on the pools and decides to share it with his

MA_775_DIABLO [31]

Answer:

(a) 750

(b) 1875

Step-by-step explanation:

4 0

2 years ago

A survey claims that a college graduate from Smith College can expect an average starting salary of $ 42,000. Fifteen Smith Coll

jek_recluse [69]

<h2>Answer with explanation:</h2>

Let $\mu$ be the average starting salary ( in dollars).

As per given , we have

$H_0: \mu=42000\\\\ H_a:\mu$

Since $H_a$ is left-tailed , so our test is a left-tailed test.

WE assume that the starting salary follows normal distribution .

Since population standard deviation is unknown and sample size is small so we use t-test.

Test statistic : $t=\dfrac{\overline{x}-\mu}{\dfrac{s}{\sqrt{n}}}$ , where n= sample size , $\overline{x}$ = sample mean , s = sample standard deviation.

Here , n= 15 , $\overline{x}= 40,800$ , s= 225

Then, $t=\dfrac{40800-42000}{\dfrac{2250}{\sqrt{15}}}\approx-2.07$

Degree of freedom = n-1=14

The critical t-value for significance level α = 0.01 and degree of freedom 14 is 2.62.

Decision : Since the absolute calculated t-value (2.07) is less than the critical t-value., so we cannot reject the null hypothesis.

Conclusion : We do not have sufficient evidence at 1 % level of significance to support the claim that the average starting salary of the graduates is significantly less that $42,000.

3 0

2 years ago