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grandymaker [24]
3 years ago
13

If mn = 16 and m^2 + n^2 = 68 then (m+n)^2 =

Mathematics
1 answer:
Dima020 [189]3 years ago
7 0

Answer:

B.   100

Step-by-step explanation:

(m + n)^2

= m^2 + 2mn + n^2

Rearrange

(m^2 + n^2) + 2mn

Substitute

(68) + 2*16

= 68 + 32

= 100

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A researcher is interested in estimating the average salary of police officers in a large city. She wants to be 95% sure that he
inn [45]

Answer:

The sample size is 183.

Step-by-step explanation:

Given:

σ = $1050, ppulatin standard deviation

99% confidence interval

Accuracy = +/- $200

The accuracy is given by

z*(σ/√n)

where

z* = 2.576 for 99% confidence level (from tables)

n = sample size

Therefore

2.576(1050/√n) = 200

√n = (2.576*1050)/200 = 13.524

n = 182.9

<em>The sample size is 183</em>

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6 0
3 years ago
A Girl Scout camp served half of their granola with breakfast. After dinner, they put the remaining 6{,}250 \text{ g}6,250 g6, c
Iteru [2.4K]

Answer:

12.5 kilograms

Step-by-step explanation:

Given:

Half of the granola served with breakfast.

Let the amount of Granola present initially = x kg

Half of it (\frac{x}{2}) served with breakfast, so remaining granola :

x-\dfrac{x}{2} = \dfrac{x}{2}

After dinner, the remaining granola 6,250 gm granola was served with yogurt dessert.

First of all, let us convert it to kilogram because the answer is required in Kilograms.

We know that:

1000 gms = 1 kilograms

1 gms = 0.001 kilograms

6250 gms  = 6250 \times 0.001 = 6.250 kilograms

Now, as per given question statement:

\dfrac{x}{2} = 6.250\ kg\\\Rightarrow x = 2 \times 6.250\\\Rightarrow \bold{x = 12.5\ kg}

So, the answer is:

Girl scout camp started with 12.5 Kilograms of granola.

5 0
3 years ago
Help, please iiiiiiiiiiiiiii nnnnnnnnnneeeeeeedddddd iiiiiiiiitttttt
trasher [3.6K]

Answer:it’s a

Step-by-step explanation:

7 0
3 years ago
Hi please answer and you dont NEED to show work but if u do i will give brainliest
Advocard [28]

Answer:

y=-\frac{2}{5} -1

Step-by-step explanation:

So first thing is that slope intercept form is setup like this

y=mx+b

m=slope

b=y intercept

the slope is change in y over change in x

as y goes down 2 x goes up 5

so the slope is -2/5

the y intercept is at (0,-1) so the y intercept is -1

therefore the answer is

y=-\frac{2}{5} -1

have a great day :)

8 0
3 years ago
Read 2 more answers
Write <br> (−5x)(−5x)(−5x)(−5x)<br> as a power.
Yuliya22 [10]

Answer:

(-5x)^4

Step-by-step explanation:

3 0
3 years ago
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