So you know the whole line is XZ which is 83.Then you find out it is in two parts so that is XY and YZ which are 11 and 4c. You can make the equation:
11+4c=83
4c=72
c=18
c=18 and YZ=72
Answer:
The percentage increase in Jayana's postcard collection is 15%
Step-by-step explanation:
Jayana had 20 postcards last year
With 3 more postcards this year
From the given equation Quantity = Percent x Whole
Here;
Let P = Percent/100%
Quantity = Increment in postcard = 3 postcards
Whole = The total postcards from last year = 20 postcards
Hence,
3 postcards = P x 20 postcards
P = 3/20 = 0.15
Recall P = Percent/100%
∴ Percent = P x 100% = 0.15 x 100% = 15%
The percentage increase in Jayana's postcard collection is 15%
I would if i had paper:( its hard to explain
Option B: (b-a)/(b+a) is the correct answer
Step-by-step explanation:
The given expression is;

First of all we have to take LCM in both numerator and denominator
So,

The reciprocal of the denominator will be multiplied with the numerator for simplification
So,

Hence,
Option B: (b-a)/(b+a) is the correct answer
Keywords: Fractions, expressions
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