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Alekssandra [29.7K]
2 years ago
7

If a:b = 3:4 and b:c= 5:7, find a:c. WORKING OUT NEEDED.

Mathematics
1 answer:
mixer [17]2 years ago
5 0

Answer:

3:7

Step-by-step explanation:

a:b

a=3

b=4

b:c

b=5

c=7

a:c

3:7

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What are the solutions on the following system?
Oksana_A [137]
2x+y = -5.  Solve this for y.  We get y = -2x - 5.  Find y^2:  4x^2 + 20x + 25.  Substitute 4x^2 + 20x + 25 for y^2 in the first equation:

x^2 + 4x^2 + 20x + 25 = 25

Then 5x^2 + 20x = 0, so that x = 0.  Subst. 0 for x in the 2nd eqn and find the value of y.  Write your solutions as shown above:  (  ,  ) and (  ,  ).
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3 years ago
Please help me with this it is very important to my grade
arsen [322]

Answer:

Option B is correct

Step-by-step explanation:

\sf \longmapsto \: \frac{{x}^{3}  -  {y}^{3} }{4} \\ \sf \longmapsto \:  \frac{ {4}^{3}  -  {2}^{3} }{4}  \\ \sf \longmapsto \:  \frac{64 - 8}{4}  \\ \sf \longmapsto \:  \frac{56}{4} \:  \:  \:  \:  \:  \:  \:  \:   \\ \sf \longmapsto \: 14

6 0
3 years ago
Jerome is a pharmacy technician that filled a prescription that use 1/4 bottle of ibuprofen. How many pills did jerome use for t
Neporo4naja [7]

It is clearly mentioned in the question that each bottle of ibuprofen has 1000 pills.

Now, 1/4 bottle of ibuprofen is used to make the prescription.

So, if one bottle of ibuprofen has 1000 pills and 1/4 1/4 bottle of ibuprofen is used to make the prescription, then Jerome obviously used \frac{1000}{4}=250 pills of ibuprofen to make the prescription.

This can be further explained as follows:

1 bottle=1000 pills

\therefore \frac{1}{4} bottle=\frac{1000}{4}=250 pills.


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