Question

Which of the following functions has the largest value when x = 5?

p(x) = 2x2 + 4x + 11
h(x) = 4x
s(x) = 10x

a. p(x)
b. h(x)
c. s(x)
d. All the functions are equal at x = 5.

Answer 1

Largest value is at p(5) is 81

Explanation:

We have given three function
`p(x)= 2x^2+4x+11,h(x)=4x, s(x)=10x`

we need to check the largest value at
`x=5`

substitute
`x=5` in p(x) we will get
`p(5)=2\cdot5^2+4\cdot5+11` we will get
`p(5)=2\cdot25+4\cdot5+11`

`p(5)=50+20+11=81`

Now, substitute
`x=5` in h(x) we wil get
`h(5)=4\cdot5` we will get
`h(5)=20`

Similarly, substitute
`x=5` in s(x) we will get
`s(5)=10\cdot5` we will get
`s(5)=50`

Now, comparing all the three values of
`p(5)`,
`h(5)`,
`s(5)`

Largest value is at p(5) is 81

Answer 2

`p(5)=2*5^2+4*5+11=2*25+20+11=50+31=81`

`h(5)=4*5=20`

`s(5)=10*5=50`

The answer: A
:)