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tekilochka [14]
3 years ago
5

What are two equivalent forms for the polynomial 3x - 2x -2x? How do you get them?

Mathematics
1 answer:
Lynna [10]3 years ago
5 0
Simplify 3x -2x -2x = 3x + -2x + -2x  
Combine like terms: 3x + -2x + -2x = (3x + -2x +-2x) = -x 
answer is: -x
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5x^(-2)-17x^(-1)+6<br> i’m so confused pls help<br> will give brainliest
laila [671]

It's a quadratic equation in disguise. If you let y=x^{-1}, then y^2=x^{-2}, and we can rewrite the equation as

5y^2-17y+6=0

Solve for y however you like; we get y=\dfrac25 and y=3.

But we want to solve for x, so we have

y=x^{-1}=\dfrac25\implies x=\dfrac52

y=x^{-1}=3\implies x=\dfrac13

5 0
4 years ago
Mollie watches a film that lasts 130 min it begins at 6:15 pm. What time did it end?
Natalka [10]
Answer:

Starts at 6:15

Note: An hour is 60 minutes.

So an hour after 6:15 is 7:15 and an hour after that is 8:15. Now just add another 10 minutes and you get 8:25.

So the film ended at 8:25.

8 0
3 years ago
Jeri's lawn service charges an initial fee of $4.50 plus $3 an hour. If she is asked to
STALIN [3.7K]

Answer:

5 hours 22 minutes

Step-by-step explanation:

Let us represent the number of hours that Jeri worked as: h

Jeri's lawn service charges an initial fee of $4.50 plus $3 an hour

= $4.50 + $3 × h

= $4.50 + 3h

If she is asked to start before 7 a.m. Jeri charges 1.5 times the regular amount.

= 1.5 × ($4.50 + 3h)

If she made $29.25 on a job that began at 5 am, how many hours did Jeri work?

Hence, we have the final equation;

= 1.5 × ($4.50 + 3h) = $29.25

= 6.75 + 4.5h = 29.25

Collect like terms

= 4.5h = 29.25 - 6.75

4.5h = 22.5

h = 22.5/4.5

h = 5.3571428571

Approximately= 5.36 hours

1 hour = 60 minutes

0.36 hour =

60 × 0.36

= 21.6 minutes

Approximately ≈ 22 minutes

Therefore, Jeri worked for 5 hours 22 minutes

7 0
3 years ago
The price of a 6-minute phone call is 1.80. What is the price of a 12-minute phone call?
hoa [83]

Answer:

3.60

Step-by-step explanation:

1.80 x 2

4 0
3 years ago
Read 2 more answers
PLZ HELP ME WITH THIS IT DUE TODAY.I GIVE YOU BRAINLEST JUST PLEASE HELP!!!! THANK YOU!
Fiesta28 [93]
I’m not sure about number 1 but the answer for number 2 is

-4 1/2, -4.2, -4, ,0, 4
5 0
4 years ago
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