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3 years ago

10

Use f(x)=-2x+5 to find x when f(x)=11

1 answer:

Damm [24]3 years ago

3 0

When it asks this question, ultimately you want to plug 11 into x because its f(x). 11=-2+5.

Then you subtract 5 on both sides because of the opposite of addition is subtraction.

6=-2x

now divide on both sides

x=-3

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#10 PLEASE I BEGGGGG

Aneli [31]

I cant directly give u the answer but here is some help:

for part a add up and solve the equazions on the whiteboard.

for part b subtract 90 from what you got from part a.

Hope this helps. Sorry i couldnt help more.

4 0

3 years ago

Q4 Q20.) Give the equation of the exponential function whose graph is shown.

Elodia [21]

Hi again!

I used an online calculator to help me graph each of the functions.

The correct answer is option D

Let me know if you have any questions about the answer!

3 0

3 years ago

How do you journal equipment on hand?

777dan777 [17]

Answer:

I just looked it up on google and it said to create journal entries...

Step-by-step explanation:

hope this helps... but idk

6 0

3 years ago

Solve the question on the picture if it is wrong

romanna [79]

Given:

Cost of 1 digital song = $1.05

Cost of 2 digital song = $2.10

Cost of 5 digital song = $5.25

To find:

The equation and the cost of 25 downloaded digital songs.

Solution:

Let us take two points (1, 1.05) and (2, 2.10).

Here $x_1=1, y_1=1.05, x_2=2, y_2=2.10$

Slope:

$$m=\frac{y_2-y_1}{x_2-x_1}$

$$m=\frac{2.10-1.05}{2-1}$

m = 1.05

Using point-slope formula:

$y-y_1=m(x-x_1)$

$y-1.05=1.05(x-1)$

$y-1.05=1.05x-1.05$

Add 1.05 on both sides, we get

$y=1.05x$

Here x is the independent variable and c is the dependent variable.

So that substitute x = n and y = c.

$c=1.05n$

The equation is c = 1.05 n.

Substitute n = 25 in the equation.

$c=1.05(25)$

$c=26.25$

The cost of 25 songs is $26.25.

8 0

3 years ago

Find the equation of the midline of the function y = 2 sin(1∕4x) – 3.

Aneli [31]

<h3>Answer: A) y = -3</h3>

Explanation:

The general sine equation is

y = A*sin(B(x-C)) + D

where the D variable directly determines the midline. In this case, D = -3, so that corresponds to a midline of y = -3

The sine curve oscillates going up and down, passing through this middle horizontal line infinitely many times. See the graph below.

5 0

3 years ago