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Ksju [112]
3 years ago
11

How long would it take to travel 30 miles at an average speed of 50 miles per hour

Mathematics
1 answer:
Mars2501 [29]3 years ago
5 0

Answer:

1.6 hours so 96 minutes

Step-by-step explanation:

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How many ounces of 50% alcohol solution must be mixed with 80 ounces of a 20% alcohol solution to make a 40% alcohol solution?
Paraphin [41]
X = amount of 50% solution
y = total amount after mixing

Note that the amount of alcohol in the 20% solution is 80 (0.2) = 16 oz.

We have 2 unknowns, so we need 2 equations:
first, we can write the equation for the total volume:
y = x + 80

next, apply the percentages to get an equation for the amount of alcohol:

0.4 y = 0.5 x + 16

Finally, solve the pair of equations (in this case, by substitution of the 1st into the second:
0.4 (x + 80) = 0.5x + 16
0.4 x + 32 = 0.5X + 16
rearrange and combine like terms:
0.1x = 16
x = 160
from the 1st equation:
y = 160 + 80 = 240
8 0
2 years ago
Carlos and Lily want to know the combined amount of money they made last week. They both made $12 per hour, but Carlos also made
steposvetlana [31]

Answer:

  • Lily is right

Step-by-step explanation:

<u>Carlos made:</u>

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<u>Lily made:</u>

  • 12L

<u>Together they made:</u>

  • 12C + 35 + 12L = 12(C + L) + 35

Lily is right. We don't know what 120 means in Carlos's equation, he should put 12L for Lily.

6 0
2 years ago
Helpppppp please i need help on this question
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Step-by-step explanation:

K=12 if you want explanation i will

8 0
3 years ago
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At a quiz competition, for every question team A answered correctly, team B answered 2 questions correctly. The ratio of the num
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A : B
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A small pebble has a mass of<br> about<br> 20 L<br> b.<br> 20 ml<br> 20 g<br> 20 kg<br> d.
zhuklara [117]

Answer:

20g

since mass should be in kg or gram if small then g

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