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GrogVix [38]
3 years ago
7

If f(x)=x^2-2x, find: f(-4)=?

Mathematics
1 answer:
Helga [31]3 years ago
4 0

Answer:

(f-4) = 24

Step-by-step explanation:

f(x)=x^2-2x.

The given function is a function of x such that the value of the function at any time is determined by the value of x at that time. Therefore, the value of the function is determined by substituting a value for x in the equation, x^2-2x

We want to determine f(-4)

From the information given, x would take the value of -4

So x = -4. Therefore, we will substitute x = - 4 into equation x^2-2x

This becomes

f (-4) = (-4^2) - (2 × -4)

f(-4) = 16 + 8

(f-4) = 24

So the value of the function, f(x)=x^2-2x at (f-4) is 24

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valentina_108 [34]

Answer:

-6

Step-by-step explanation:

-1+(-5)

You are moving down the numberline, then subtracting again because of the negative sign. -(1+5) is how I like to think of it.

So, 1+5=6, and you add the negative sign. -1+(-5)=-6.

6 0
3 years ago
I need help with this!!
tresset_1 [31]

Answer:

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Step-by-step explanation:

5 0
3 years ago
Write the linear inequality shown in the graph.
Korolek [52]
Fist, in the equation y=mx+b, b is the y-intercept. The y-intercept is the poin on the line that crosses the x-axis; the y-intercept is the value of yThese equations follow that format. 
Y=mx+b
y\geq 3x-4. <-----In this equation, the slope(m)=3 b= -4. 

On the graph, we can see that the line crosses the x-axis at y=-4. Knowing that, we can eliminate the answer choices with +4 in the inequality.


The next step, is to pick an (x,y) coordinate that is in the shaded region and plug it into the remaining 2 inequalities. Which ever inequality is true after you solve it, that is the correct answer.  
For example, I'll choose to plug in (-4,4) into the y\geq 3x-4. 
y\geq 3x-4. 
(4)\geq (3(-4))-4. 
(4)\geq (-12)-4. 
(4)\geq -16

So, this statement is true becasue -16 is less than positive 4.  Therefore, the correct answer would be y\geq 3x-4. Hope that helped! Comment back with any further questions!


6 0
3 years ago
Complete the square to write the equation, 4x2 + 24x – y + 43 = 0, in standard form.
Tamiku [17]

Answer:

y=4

x=3

7

Step-by-step explanation:

Edg2021

5 0
3 years ago
Read 2 more answers
I would appreciate it if you help me pls asap !!
masha68 [24]

Answer:

BC= 20 units

Step-by-step explanation:

Since ∆ ABC is an equilateral triangle, all the sides are equal in length.

AC= BC

=>-y+23= 6y+2

=>-y-6y= 2-23

=>-7y= -21

=>y= 21/7

=>y= 3

BC = 6y+2 = 6(3)+2 = 18+2 = 20 units

7 0
3 years ago
Read 2 more answers
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