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SpyIntel [72]
3 years ago
6

How do I solve for c and d

Mathematics
1 answer:
tankabanditka [31]3 years ago
6 0
For c using proportionality of corresponding sides you can writing 

(3c+4)       9
--------- = -------
    20         15

(3c+4)       3
---------- = ------    cross multiple 
    20          5

5(3c+4) = 20*3   divide both sides by 5

3c+4=4*3

3c+4=12

3c = 8

c = 8/3

for d you can writing 

(2d-3)       9
--------- = ------
   12          15

(2d-3)       3
--------- = -------   cross multiple 
   12          5

5(2d-3) = 12*3

10d -15 = 36

10d = 51

d = 51/10

d = 5,1

hope helped 

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Taxi A
4miles £3.50+£7.00=£10.50
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Taxi A
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Taxi B
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^^^
They would have to drive 9 miles for the taxi to cost the same.

Hope this helped, this is the longest way to work it out but also the simplest.
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Step-by-step explanation:

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and a is increased by 10

a=20+10

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therefore; P=f/a

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