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2 years ago

5

A rectangular plot of ground measuring 12 meters by 20 meters is surrounded by a sidewalk of a uniform width. the area of a side

walk is 68square meters what is the width of the sidewa;l

1 answer:

bearhunter [10]2 years ago

3 0

<span>The walk is 1 meter wide
check:

OK</span>

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A chemistry teacher needs to mix a 40%

Yanka [14]

Let f and e represent the amount of 40% and 80% solutions used...

We are told the f+e=20 which means that f=20-e and we can say that:

(.4f+.8e)/20=.7, using f=20-e in this equation we see that:

.4(20-e)+.8e=14

8-.4e+.8e=14

8+.4e=14

.4e=6

e=15, and since f=20-e then

f=5

So 15 quarts of 80% solution is mixed with 5 quarts of 40% solution to produce a 20 quart mixture of 70% solution.

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3 years ago

-2(7 – 5x – 3) = -2(7 + [<br> X + <br> answer

dmitriy555 [2]

Answer:

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I think this is right

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3 years ago

Sketch the graph of y=2(x+1)^2 and identify the axis of symmetry.

CaHeK987 [17]

The axis of symmetry is (-1,0)

Hope this helps!

6 0

2 years ago

Read 2 more answers

Find the slope that passes through (2,-4) and (5,2)

yanalaym [24]

Hi there! :)

Step-by-step explanation:

$SLOPE=\frac{Y_2-Y_1}{X_2-X_1}=\frac{RISE}{RUN}$

$\frac{2-(-4)}{5-2}=\frac{6}{3}=2$

<u><em>Therefore, the slope is 2.</em></u>

<u><em>Final answer is 2.</em></u>

<u><em>*The answer must have a positive sign.*</em></u>

I hope this helps you!

Have a nice day! :)

:D

-Charlie

Thank you! :)

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3 years ago

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Answer:

Juanita dissolves 46 g of MgBr2 (molar mass: 184.11 g/mol) in 0.5 kg of distilled water. What is the molality of the solution?

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2 years ago