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Alina [70]
3 years ago
5

Can u help me with number 2-4 plz now!!

Mathematics
1 answer:
Montano1993 [528]3 years ago
4 0
Number two. Equals 4
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HELP I NEED THIS DONE FAST
Rudiy27

Answer:

<h3>80.1 x 10 <em>7</em></h3>

Step-by-step explanation:

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3 years ago
Please help :)))))))))))
olya-2409 [2.1K]

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Your answer is C and D

Step-by-step explanation:

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2 years ago
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You need a 45% alcohol solution. On hand, you have a 175 mL of a 25% alcohol mixture. You also have 70% alcohol mixture. How muc
Bezzdna [24]

175 mL at 25% concentration of alcohol contains 0.25 (175 mL) = 43.75 mL of alcohol. If <em>v</em> is the amount of the 70% solution that you use, then that amount contains 0.7<em>v</em> mL of alcohol.

Mixing these two yields a total volume of 175 mL + <em>v</em>, and it contains 43.75 mL + 0.7<em>v</em> alcohol. You want to end up with a concentration of 45%, which means the ratio of the amount of alcohol to the total volume needs to be 0.45:

(43.75 mL + 0.7<em>v</em>) / (175 mL + <em>v</em>) = 0.45

Solve for <em>v</em> :

43.75 mL + 0.7<em>v</em> = 0.45 (175 mL + <em>v</em>)

43.75 mL + 0.7<em>v</em> = 78.75 mL + 0.45<em>v</em>

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5 0
3 years ago
Justify whether the solution makes sense.
Zigmanuir [339]

Answer:

They are identical triangles.

Step-by-step explanation:

Angles in a triangle add up to 180 degrees.

The triangle with 39 and 90 has a missing angle of 51 degrees, and the triangle with 51 and 90 vice versa.

5 0
2 years ago
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Two years ago, Paul bought $350 worth of stock in a cell phone company. Since then the value of his stock has been increasing at
zalisa [80]

Answer: $384.13 ( rounded)

Original number: $384.125

Step-by-step explanation:

Find 9.75% of Paul's original stock, to find out how much it increased.

9.75*350/100=34.125

Add $34.125 to his original stock.

$384.125

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3 years ago
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