evaluate the expression f(x)=3x=5/x for x=10?

You want the value of the function at a particular given value of x which is 10.

Substitute the value 10, into the x place in your equation.

Your equation doesn't make sense though.

you can't have f(x) = 3x = 5/x

Seperately if f(x) = 3x
and f(x) = 5/x

Then for x = 10

Each of them respectfully is.

3x = 3(10) = 30
5/x = 5/10 = 1/2

If it's the 3x + 5x you meant to do.

Then 30 + 1/2 = 30.5

in case you have an expression in terms of x, as yours is, and an x fee (x = 10), all you are going to be able to desire to do is replace each x in the expression with the x fee. So the place f(x) = 4x + (10/x) f(10) = 4 situations 10 + (10/10) =40 + a million =40-one consequently, the answer to the expression is f(10) = 40-one

I assume you meant to enter

f(x) = 3x + 5/x

Put 10 in for x

3*10 + 5/10 = 30 + 1/2 = 30 1/2 or 61/2

f(x)=3x=5/x has not yet been defined.

A mind reader would suggest that you mean :-
f (x) = 3x + 5 / x
f 10) = 30 + 1/2
f (10) = 30 ½

f(x) = 3x + (5/x)
f(10) = 3(10) + (5/10)
f(10) = 30 + ½
f(10) = 30.5


f(x) = 3x - (5/x)
f(10) = 3(10) - (5/10)
f(10) = 30 - ½
f(10) = 29.5

I don't know why I see two equal signs, but I'm going to assume the second equal sign is supposed to be a plus (in that you forgot to press SHIFT).

f(x) = 3x + (5/x)

Plug in x = 10.

f(10) = 3(10) + (5/10)
f(10) = 30 + (1/2)
f(10) = 60/2 + 1/2
f(10) = 61/2

If = is +, then:
f(x) = 3x + 5/x
f(10) = 3(10) + 5/10
f(10) = 30 + 1/2
f(10) = 30 1/2 (30.5)

If = is -, then:
f(x) = 3x - 5/x
f(10) = 3(10) - 5/10
f(10) = 30 - 1/2
f(10) = 29 2/2 - 1/2
f(10) = 29 1/2 (29.5)

substitue x = 10 into the equation and compute. Assuming there are 2 separate questions f(x) = 3x and f(x) = 5/x,

f(x) = 3x = 3(10) = 30.

No excuses not to do the next one on your own.

Typing error?