2 years ago

F(x) = 3x-1 find f(x) when x=2

Mathematics

1 answer:

IgorC [24]2 years ago

4 0

When X = 2, we substitute this value into the equation f(x) = 3x-1
3(2)-1 = 6-1=5
f(x)=5

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erastovalidia [21]

Answer:

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The solution of the system can be given as (5,-8).

Step-by-step explanation:

Given system of equations:

$y=-x-3$

$5x+2y=9$

To solve the given system of equations:

Solution:

We will use substitution to solve the given system.

We will substitute the $y$ values in terms of $x$ from the equation $y=-x-3$ into the other equation to solve for $x$

Substituting $y=-x-3$ into $5x+2y=9$ .

We have:

$5x+2(-x-3)=9$

Using distribution.

$5x-2x-6=9$

Combining like terms.

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Adding 6 both sides.

$3x-6+6=9+6$

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Dividing both sides by 3.

$\frac{3x}{3}=\frac{15}{3}$

∴ $x=5$

Plugging in $x=5$ into $y=-x-3$ .

We have,

$y=-5-3$

∴ $y=-8$

The solution of the system can be given as (5,-8).

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Vanyuwa [196]

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