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Sphinxa [80]
2 years ago
14

Simplify the expression: 7x2–5x2 i need the answer quickly

Mathematics
2 answers:
soldier1979 [14.2K]2 years ago
5 0

Answer:

2x^2

Step-by-step explanation:

combine like terms, and do the subtraction!

exis [7]2 years ago
3 0

Answer:

2x^2

Step-by-step explanation:

7x^2-5x^2 is equal to 2x^2 because they have the same degree, they are able to be added and subtracted.

If this has helped you please mark as brainliest

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Solve pls. dont mind the one i circled ! ty!!!
9966 [12]

Answer:

The answer is B.

Step-by-step explanation:

If this is wrong im very very sorry!

A brainlist would be appreciated! I'm almost an expert!

8 0
2 years ago
Ellus
butalik [34]

9514 1404 393

Answer:

  2.25

Step-by-step explanation:

Add the square of half the x-coefficient to complete the square.

  (-3/2)² = 9/4 = 2.25

4 0
3 years ago
in a hotel ,100 bulbs each of 60W are lightened for 6 hours a day and 40 fans each of 50Wvate run for 10 hours a day . calculate
alekssr [168]

Answer:

1680 kwhr

Step-by-step explanation:

See attached for explanation.  I converted watt*hr to kW*hr by dividing by 1000.

Fans Bulbs  

 40         100  

 50          60      W

  10            6       hours/day

20000 36000 W*hr/day

 30          30 days/month

600000 1080000    W*hr/month

  600      1080   kWhr/month

 

Total = 1680 kWhr/month

5 0
2 years ago
Simplify the expression 14y +6+3y
umka2103 [35]

Answer:

The simplified version is 17y + 6.

Step-by-step explanation:

14y + 6 + 3y

17y + 6

4 0
3 years ago
Read 2 more answers
Tom has 12 reports to file. If each report takes an average of 45 minutes to file, how long will it take him to file 75% of them
Jobisdone [24]

Alright, lets get started.

One report takes to file an average of = 45 minutes

Means 12 reports takes to file time = 12 * 45 = 540 minutes

12 reports filing total time = 540 minutes

We are asked to find time to file 75 % of them.

Which means 75 % of 540

= 540 * 75/100

= 540 * 0.75

= 405 minutes

We could convert it into hrs dividing with 60.

405 / 60 = 6.75 hrs

Means it will take 6.75 hrs to file 75% of them: Answer

Hope it will help :)

8 0
3 years ago
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