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sergiy2304 [10]
3 years ago
6

How many students took the survey? 10 11 20 or 9

Mathematics
1 answer:
DochEvi [55]3 years ago
6 0

ANSWER FOR YOUR QUESTION

ANSWER IS 10

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Evaluate the expression. 1/2 - 4 (1/2 + 1)^2
insens350 [35]

Answer:

D. -17/2

Step-by-step explanation:

1/2 - 4 (1/2 + 1)^2

First we evaluate what is inside the parentheses

1/2 - 4  (3/2) ^2

Now we square what is inside the parentheses

1/2 - 4(9/4)

Now multiply

1/2 -9

Get a common denominator  9 = 9 *2/2 = 18/2

1/2 - 18/2

-17/2


6 0
3 years ago
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How much pure acid should be mixed with 6 gallons of a 50% acid solution in order to get a 70% acid​ solution?
Mashutka [201]
To help with thinking about this, we can say that the 6 gallons of 50% acid contains 3 gallons of pure acid and 3 gallons of filler. This would make the concentration 3/6, or 50%. Adding a gallon of pure acid would shift the concentration to 4/7, or 57.1%.

When the relationship becomes 70%, four gallons of pure acid have been added.

3+4 7
—— = — = 70%
6+4 10
3 0
2 years ago
In 4 hours, the temperature steadily fell from 0°F to −12°F. What was the average change in temperature per hour? The average ch
grin007 [14]
-3 because it reduced -3 every hour of you divide -12 by 4 you will get -3 which is the average
4 0
3 years ago
Complete the statement<br><br> 20ft 9 in = __in
RideAnS [48]

Answer:

249 in

Step-by-step explanation:

6 0
2 years ago
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Find the acute angle
Scrat [10]

Answer:

22°

Step-by-step explanation:

Since the triangle is right use the sine ratio

sinQ = \frac{opposite}{hypotenuse} = \frac{7}{19}, hence

Q = sin^{-1}(\frac{7}{19}) = 22° ( nearest degree )

5 0
3 years ago
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