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LUCKY_DIMON [66]
3 years ago
15

7x + 2x^2 + 3x^2 - 2x

Mathematics
1 answer:
slava [35]3 years ago
8 0

Answer:

Step-by-step explanation:

Explanations are below

Step 1

7x + 2x^2 + 3x^2 - 2x  Observe the equation

Step 2

7x + 2x^2 + 3x^2 - 2x  Combine the like terms

(2x^2+3x^2)+(7x+-2x)

Step 3

(2x^2+3x^2)+(7x+-2x)  Simplify by adding and subtracting

Answer: 5x^2+5x

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A car travels 45km in an hour. In each of the next two hours, it travels 78km. What is the average speed of the car.
romanna [79]

Answer:

The average speed of car is 67 kilometers per hour.

Step-by-step explanation:

Given that:

Distance travelled in one hour = 45 km

Distance travelled in next 2 hours = 78*2 = 156 km

Total distance = 45+156 = 201

Total time = 1+2 =  3 hours

Average speed of the car = \frac{Total\ distance}{Total\ time}

Average speed of the car = \frac{201}{3}

Average speed of the car = 67 km/hr

Hence,

The average speed of car is 67 kilometers per hour.

7 0
3 years ago
A road crew took 3 days to pave a road. On the first day they paved 2/5 of the road, and on the second day they 1/3 of the road.
bazaltina [42]

Answer:5625 yards

Step-by-step explanation:

2/5=6/15

1/3=5/15

6/15+5/15=11/15

(15/15)-(11/15)=4/15

1500/4=375

375×15=5625

3 0
3 years ago
Craig has a rectengular deck that measures 799 inches and 245 inches premeter and if the addtional deck is 33 inches longer,what
melomori [17]

Answer:

The length of the lights is 2088 inches

Step-by-step explanation:

<em>The question is mixed up with another (See comment for correct question)</em>

Given

Length = 799in

Width = 245in

Required

The perimeter of the deck (this is what the question implies)

The perimeter (P) is:

P =  2 * (Length + Width)

P =  2 * (799 + 245)

P =  2 * 1044

P =  2088

3 0
3 years ago
A high school coach wants to buy new shirts for the 25 members of the track team. The coach must spend less than $300 on the shi
jeka94

Answer:

1, 3, & 5

Step-by-step explanation:

Select three options.

1. The inequality should be written as 25 s less than 300.

2. The inequality should be written as 25 s greater than 300.

3. The circle is open.

4. The circle is closed.

5. The arrow points left.

I'm guessing these are the options? If so, please mark brainliest :)

4 0
3 years ago
Read 2 more answers
Experts/ace/geniuses helpp
Bas_tet [7]
The irrational number would be square root 15
6 0
3 years ago
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