1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Anna11 [10]
3 years ago
13

Hello, I gotta turn it turn in this question today, help!!!!!!

Mathematics
1 answer:
Sladkaya [172]3 years ago
3 0

Answer:

2 or -2

Step-by-step explanation:

If x² - 8x = -12

Step 1

We find x by solving

x² - 8x = -12

We equate to zero

x² - 8x + 12 = 0

We factorise

x² - 6x - 2x + 12 = 0

x(x - 6) -2(x - 6) = 0

(x - 6) (x - 2) = 0

x - 6 = 0, x = 6

x - 2 = 0, x = 2

x = 6 or 2

Step 2

What is x - 4?

When x = 6

= 6 - 4 = 2

When x = 2

= 2 - 4 = -2

Therefore, x - 4 = 2 or -2

You might be interested in
Given the function f(x)=4|x-5|+3 for what values of x is f(x)=15
Andreyy89

Answer:

  {2, 8}

Step-by-step explanation:

We want to find x for ...

  15 = 4|x -5| +3

  12 = 4|x -5| . . . . subtract 3

  3 = |x -5| . . . . . . divide by 4

  ±3 = x -5 . . . . . . show the meaning of absolute value

  5 ±3 = x = {2, 8} . . . . . add 5

The values of x for which f(x) = 15 are 2 and 8.

3 0
3 years ago
Find the coordinates of the other endpoint of the​ segment, given its midpoint and one endpoint.​ (Hint: Let​ (x,y) be the unkno
spin [16.1K]
The other endpoint is (1, -17).

The midpoint formula is:

m=(\frac{x_1+x_2}{2}, \frac{y_1+y_2}{2})

Using our midpoint and endpoint, we have:
(6, -11) = (\frac{11+x_2}{2}, \frac{-5+y_2}{2})
\\
\\6=\frac{11+x_2}{2} \text{ and } -11=\frac{-5+y_2}{2}


For the first equation (to find the x-coordinate) we will multiply both sides by 2:
6\times2=\frac{11+x_2}{2}\times 2
\\
\\12=11+x_2

Subtract 11 from both sides:
12 - 11 = 11+x₂ - 11
1 = x₂

For the second equation (the y-coordinate) we multiply both sides by 2:
-11\times2=\frac{-5+y_2}{2}\times 2
\\
\\-22=-5+y_2

Add 5 to both sides:
-22+5 = -5+y₂ + 5
-17 = y₂

This means that (x₂, y₂) is at (1, -17).
4 0
3 years ago
Deon is riding his bicycle. He rides for 7 hours at a speed of 22.4 kilometers per hour. For how many kilometers does he ride
salantis [7]
By hypothesis, Deon is riding at a speed of 22.4 kilometers per hour. So each hour, he completes 22.4 km.

If he rides for 7 hours, he completes 22.4 * 7 = 156.8 km

So in 7 hours, he rides 156.8 kilometers.

Hope this helps! :)
6 0
3 years ago
Simplify 6 - 2 3 + (-9 + 5) · 2.
Licemer1 [7]
Answer: -25

Hope this helps! <3
4 0
3 years ago
Read 2 more answers
Zoe has 5 cucumbers she grew in her garden. she wants to share them equally amoug 4 of her neighbors. how many cucumbers will ea
Kazeer [188]
Each neighbor would get 1 whole cucumber and a 1/4 of a cucumber so it would be 1 and a 1/4
6 0
3 years ago
Read 2 more answers
Other questions:
  • Please solve numbers 1-3
    13·1 answer
  • Which expression is equivalent to 10x-2x?<br> A: 8x²<br> B: x²<br> C: -10x²+2x<br> D: 10x²-2x
    8·1 answer
  • Find the slope of the line passing through the points (2,5) and (8, −4)
    5·1 answer
  • How would you classify the decimal form of 7/25?
    13·2 answers
  • I have this problem for hw and it’s due tomorrow. can someone please help me? (it’s y-4 not 4-4)
    11·1 answer
  • On monday marco practiced the piano for 7/10 hour. On Tuesday he practiced for 1 1/4 hours each day write a question that involv
    9·2 answers
  • Lines l and k are parallel to each other. A=120 degrees. and C=80 degrees. What is the number of degrees in B??
    5·1 answer
  • Describe how you know that this is a proportional relationship
    14·1 answer
  • Please help! I will mark as brainliest. &lt;3
    7·2 answers
  • 6 trigonometric ratio
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!