Question

What is rhe value of P+Q/P-Q if P/Q=7/3
(A) 5/3
(B) 3/2
(C) 4/2
(D) 5/2


Plz it very important ​

Answer 1

Answer:

D

Step-by-step explanation:

check the pic i have selected with this question briefly

Answer 2

Answer:

$\frac{P+Q}{P-Q}=\frac{5}{2}$

Correct option is (D).

Step-by-step explanation:

Given: P/Q=7/3

Find:  the value of P+Q/P-Q

(A) 5/3

(B) 3/2

(C) 4/2

(D) 5/2

Substitution Method Steps

1. Simplify the given equation by expanding the parenthesis.
2. Solve one of the equations for either x or y.
3. Substitute the step 2 solution in the other equation.
4. Now solve the new equation obtained using elementary arithmetic operations.

The first step in the substitution method is to find the value of any one of the variables from one equation in terms of the other variable. For example, if there are two equations x+y=7 and x-y=8, then from the first equation we can find that x=7-y.

Now,

$\frac{P}{Q} =\frac{7}{3} \\\Rightarrow P=\frac{7}{3} Q$

Substitute value of P in $\frac{P+Q}{P-Q}$

$\frac{P+Q}{P-Q}\\=\frac{\frac{7Q}{3} +Q}{\frac{7Q}{3} -Q}\\\\=\frac{\frac{10Q}{3} }{\frac{4Q}{3} } \\=\frac{10}{4}\\=\frac{5}{2}$

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