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3 years ago

Karen is waiting for a pot of soup to cool

Mathematics

1 answer:

Studentka2010 [4]3 years ago

4 0

Answer:

It went down 5.5°C a minute.

Step-by-step explanation:

You have to look for the difference of 100 and 78, which is 22.

Divide the difference with the minutes (4), equalling 5.5.

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A sample of 14 high school seniors are asked, " how many hours a week do you work?". Their responses are below.

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What exactly are you asking?

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3 years ago

Use the figure and flowchart proof to answer the question:

KatRina [158]

Answer:

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Step-by-step explanation:

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3 years ago

Find the value of x to the nearest tenth.<br>

Oksi-84 [34.3K]

Ok i hope this helps and if it does pls give me brainliest!

So the longest line is 8 and makes a 90 degree angle with another smaller line which is labled 3.6. X is longer than 3.6 ( only by a little bit) But it looks like its half of the longest line (8). So i think the answer would be X equals 4. But i was thinking about it more i relized that you would prob just divide 8 by 3.6 which would be 2.22222 .... And that rounded tot he nearest 10th would be 2.2.

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3 years ago

What are the excluded values? b = 0 and -10 b = 2 and 5 b = 3 and 7 none of the above

Dominik [7]

b= 2 and 5

is your answer to the above question.

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2 years ago

A chemical company makes two brands of antifreeze. The first brand is 20% pure antifreeze, and the second brand is 70% pure anti

andre [41]

Answer:

First brand of antifreeze: 21 gallons

Second brand of antifreeze: 9 gallons

Step-by-step explanation:

Let's call A the amount of first brand of antifreeze. 20% pure antifreeze

Let's call B the amount of second brand of antifreeze. 70% pure antifreeze

The resulting mixture should have 35% pure antifreeze, and 30 gallons.

Then we know that the total amount of mixture will be:

$A + B = 30$

Then the total amount of pure antifreeze in the mixture will be:

$0.2A + 0.7B = 0.35 * 30$

$0.2A + 0.7B = 10.5$

Then we have two equations and two unknowns so we solve the system of equations. Multiply the first equation by -0.7 and add it to the second equation:

$-0.7A -0.7B = -0.7*30$