Answer:
D: 5 : 8 and 20 : 32
Step-by-step explanation:
A is incorrect because 3 x 1.33 = 4 and 4 x 1.25 = 5.
B is incorrect because 10 x 1.6 = 16 and 12 x 1.5 = 18.
C is incorrect because 7 x 1.428 = 10 and 10 x 1.4 = 14.
D is correct because 5 x 4 = 20 and 8 x 4 = 32.
another way of solving the ratio answers is by putting them in a fraction 5/8 = .625 and also does 20/32 = .625.....
Easy right!?
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ANSWER TO QUESTION 1

We multiply through by the Least Common Multiple which is 2.


We expand brackets to obtain,

Grouping like terms, have


Whenever you solve an equation and you get the above result, you don't have to get confuse.
It simply means the question does not have a UNIQUE solution.
That any real number will number will satisfy the above equation.
Hence,

ANSWER TO QUESTION 2

We factor x to obtain;

We divide both sides by (a+b)
Answer:
3/5
Step-by-step explanation:
10 total - 4 = 6
6/10 = 3/5