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adoni [48]
3 years ago
8

Four friends earn $ 24 washing cars and c dollars cutting grass. They want to divide the total amount into equal parts.

Mathematics
2 answers:
andreyandreev [35.5K]3 years ago
7 0

Answer:

$15.50

Step-by-step explanation:

First, we need to figure out the total amount they get.

This can be modeled by: 24+38=62

Now we need to divide that equally.

62/4=15.5

This means that each friend should get $15.50

olganol [36]3 years ago
6 0

Answer:

$15.50

Step-by-step explanation:

From washing cars, each friend should get $24/4, or $6.

From cutting grass, each friend should get $38/4, or $9.50.

Thus, each friend is due ($6 + $9.50), or $15.50.

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Answer for the first one - it's complicated, but that maths is correct

I kind of cheated and did it a different way than they'd expect. By doing 24 squared, that gives you 576. 

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Use prime factorization to reduce 36/180
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The fraction 36/180 can be recuced to 1/5 because 36 divided by 36 is 1 and 180 divided by 36 is 5 hope it helped :)
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3 years ago
Liam is making barbecue ribs over a fire. The internal temperature of the ribs when he starts cooking is 40°F. During each hour
Soloha48 [4]

Answer: You need to wait at least 6.4 hours to eat the ribs.

t ≥ 6.4 hours.

Step-by-step explanation:

The initial temperature is 40°F, and it increases by 25% each hour.

This means that during hour 0 the temperature is 40° F

after the first hour, at h = 1h we have an increase of 25%, this means that the new temperature is:

T = 40° F + 0.25*40° F = 1.25*40° F

after another hour we have another increase of 25%, the temperature now is:

T = (1.25*40° F) + 0.25*(1.25*40° F) = (40° F)*(1.25)^2

Now, we can model the temperature at the hour h as:

T(h) = (40°f)*1.25^h

now we want to find the number of hours needed to get the temperature equal to 165°F. which is the minimum temperature that the ribs need to reach in order to be safe to eaten.

So we have:

(40°f)*1.25^h = 165° F

1.25^h = 165/40 = 4.125

h = ln(4.125)/ln(1.25)  = 6.4 hours.

then the inequality is:

t ≥ 6.4 hours.

4 0
3 years ago
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