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ankoles [38]
2 years ago
10

Hello people ~factorise↷ x^2 + 4x –21​

Mathematics
1 answer:
EleoNora [17]2 years ago
8 0

Let's see

\\ \rm\rightarrowtail x^2+4x-21

\\ \rm\rightarrowtail x^2+7x-3x-21

\\ \rm\rightarrowtail x(x+7)-3(x+7)

\\ \rm\rightarrowtail (x-3)(x+7)

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24=9x+4-4x <br> Solve equation. Check your answer.
sammy [17]

Answer:

x=4. Verified, Not wrong.

Step-by-step explanation:

24=9x+4-4x

24 = 5x+4

20-4

5x=20

(divide)

x=4

5 0
2 years ago
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NEED HELP PLEASE!!! Please explain your answer!
Zanzabum
             <span> You must make it a fraction by multiplying by 100, moving the decimal over by 2 spaces right so we have 36. Then, put it over 100, because it is a fraction. Now, with 36/100 we must simplify by dividing each number by another # that goes into it evenly, such as 2. We get 18/50, reduce by 2, we get 9/25. There you go hope I helped </span>
7 0
3 years ago
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joe is using his allowance money to download songs from the internet. he can download them at a rate of eight songs every 10 min
Mama L [17]

Joe: 8 songs in 10 minutes = 8/10 = 0.8 songs per minute

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7 0
3 years ago
Elevator is on the 16th floor. It goes up 12 floors, down 7 floors, up 3 floors, and then down 5
seropon [69]

Answer:

The elevator stops on the 19th floor.

Step-by-step explanation:

On the 16th floor, goes up 12 floors:

16 + 12 = 28

On the 28th floor, goes down 7 floors:

28 - 7 = 21

On the 21st floor, does up 3 floors:

21 + 3 = 24

On the 24th floor, goes down 5 floors:

24 - 5 = 19

6 0
3 years ago
PLEASE HELP GEOMETRY WILL MARK BRAINLIEST!!!
rusak2 [61]
18 + 18h = 180, subtract 18 from 180, then divide by 18 and that should give you 9. 

9 = h
6 0
3 years ago
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