All categories

3 years ago

If f(x) = x + 4 and g(x) = x, what is (gºf)(-3)?

Mathematics

1 answer:

valina [46]3 years ago

6 0

(gºf) means solve f(x) first, then use that for g(x)

In the equation for f(x) replace x with -3:

f(x) = x +4 = -3 +4 = 1

Now replace the x in the equation for g(x) with 1

g(x) = x = 1

You might be interested in

Find the equation of the line passing through the points (3,-2) and (3, 4).The answer is x = 3. I'm just wondering how my textbo

Leviafan [203]

Given two points. we can find the equation of a line passing through the points

The formula to be used is:

$\frac{y_2-y_1}{x_2-x_!}=\frac{y-y_1}{x-x_!}$

where

$x_1=3,y_!=-2,x_2=3,y_2=4$ $\frac{4-(-2)}{3-3}=\frac{y-(-2)}{x-3}$

$\frac{6}{0}=\frac{y+2}{x-3}$

The next step is to cross multiply

$6(x-3)=0(y+2)$

$6(x-3)=0$

Divide both sides by 6 and make x the subject

x=3

3 0

6 months ago

Graph the solution of this inequality: 4.5x-100 >125

Lubov Fominskaja [6]

$\bf 4.5x-100\ \textgreater \ 125\implies 4.5x\ \textgreater \ 225\implies x\ \textgreater \ \cfrac{225}{4.5}\implies x\ \textgreater \ 50$

check the picture below.

4 0

3 years ago

Five times three over seven

olya-2409 [2.1K]

Answer:

15/7 or 2 1/7

Step-by-step explanation:

5 0

2 years ago

Read 2 more answers

Does the point (-1, 2) make the following equations true? i) y = -2x ii) y = x + 3

lesya [120]

Answer:

i) True

ii) True

Step-by-step explanation:

Given :-

Point (-1, 2)

To Find :

Whether the point is a solution of :

y = -2x
y = x + 3

Solving :-

Substitute the value of the point in each of the equations.

=> y = -2x

=> 2 = -2(-1)

=> 2 = 2 [∴ The point makes it true]

=> y = x + 3

=> 2 = -1 + 3

=> 2 = 2 [∴ The point makes it true]

4 0

1 year ago

Read 2 more answers

Solve -2z – 5 > 3 for z.

Natasha2012 [34]

Hi,

- 2z - 5 > 3

- 2z > 8

z < - 4

7 0

2 years ago

Read 2 more answers