# Any math geniuses out there??? a challenge calls!!!?

please give me a detailed answer…. best one gets 10pts.!!

Favorite Answer

That makes d/a = 36/9 or 4/1.

what is the value of d/a?

Use the substitution method.

2a = 3b

2a = 3 (1/2c) since b = 1/2c

2a = 3/2 c

2a = d/2 since 2c = d

4 = d/a cross multiplication

d/a = 4

2a=3b b=1/2c 3c=d so if you start substituting values. sub b=1/2c into 2a=3b

2a = 3/2c c actually equals d/3 so sub this in to 2a = 3/2* d/3

and you get 2a = 3d/6 at the point simplify and you get 12a = 3d.

solve for d/a by dividing both sides by a .. this gives 12 = 3d/a

divide 3 into 12 and d/a = 4

2a = 3b (given)=> a=3b/2

d\a = 3c \ 3b * 2

= 2c\b

b=1 /2 c => 2b = c ; 2c = 4b

substitute this in the previous equation

4b\b = 3b

b = 1/2c

3c = d

Required: d/a

solution:

a=3b/2 where b = 0.5c

a=1.5c/2

d/a = 3c/(1.5c/2)

d/a = 6/1.5

d/a = 4

d/a=6c/3b=2c/b=4

d/a=4

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