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3 years ago

. The larger of two numbers is 7 less than twice the

Mathematics

1 answer:

Ganezh [65]3 years ago

4 0

Answer:

x = 2y - 7

x + y = 47

substitute x

2y - 7 + y = 47

3y = 54

y = 18

x = 2x18 - 7

x = 29

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If $f(x)=3(x+5)+\frac{4}{x}$ we get $\mathbf{f(a+2)=\frac{3a^2+27a+46}{a+2}}$

Step-by-step explanation:

We are given the function: $f(x)=3(x+5)+\frac{4}{x}$ we need to find the value of f(a+2)

For finding the value of f(a+2) we will put x= a+2

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Put x = a+2

$f(a+2)=3(a+2+5)+\frac{4}{a+2}\\Solving:\\f(a+2)=3(a+7)+\frac{4}{a+2}\\Taking\:LCM\\f(a+2)=\frac{3(a+7)(a+2)+4}{a+2}\\f(a+2)=\frac{3(a^2+2a+7a+14)+4}{a+2}\\f(a+2)=\frac{3(a^2+9a+14)+4}{a+2}\\f(a+2)=\frac{3a^2+27a+42+4}{a+2}\\f(a+2)=\frac{3a^2+27a+46}{a+2}$

So, If $f(x)=3(x+5)+\frac{4}{x}$ we get $\mathbf{f(a+2)=\frac{3a^2+27a+46}{a+2}}$

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