57.6k views
4 votes
I need help !!

Equation Given Value Function Solution
y=5x-4
when x = 5

Equation Given Value Function Solution
y=-2/5x+3/8
when x=1/3

Equation Given Value Function Solution
y=3x+1
2 when x=4

1 Answer

7 votes

Answer:

when we have a function:

y = f(x)

Evaluating the function just means replace the independent variable (x) by a given number.

Then, for the first case we have:

y=5x-4

when x = 5

Here we just need to replace x by 5 in the equation for y.

y = 5*(5) - 4

y = 25 - 4 = 21

for the second case:

y= -2/5x+3/8

when x=1/3

We just need to replace x by 1/3 in the equation, we will get:

y = -2/(5*(1/3)) + 3/8

y = - 2*3/5 + 3/8 = - 6/5 + 3/8

Now we need to find a common multiple between 8 and 5, that common multiple is 8*5 = 40

Then we can rewrite:

y = - (6*8)/40 + (3*5)/40 = (-48 + 15)/40 = -33/40

Finally, for the third case:

Equation Given Value Function Solution

y=3x+1

when x=4

We just need to replace x by 4 in the equation, so we will get:

y = 3*4 + 1

y = 12 + 1 = 13

User Wmk
by
8.6k points

No related questions found

Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.

9.4m questions

12.2m answers

Categories