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Darya [45]
4 years ago
5

Factor the following equation: 4x^2 – 81

Mathematics
1 answer:
pishuonlain [190]4 years ago
3 0
The answer is:
(2x+9)(2x-9)
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the answer is 5.3 cm height.

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Numarul 4 este solutie a ecuatiei 3(x-1)=5+x
sweet-ann [11.9K]
To solve x, you would distribute the 3 to the numbers in the parenthesis. 3x-3=5+x Now you would combine like-terms which would give you: 2x=2. Now you would divide by 2 on both sides to give you x=1. I hope you understand what I did. Hope I helped you!
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Dae and Eric are working together on a paper. Dae typed 333 words in 9 minutes, and Eric typed 252 words in 6 minutes. How many
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Answer:

42 i think

Step-by-step explanation:

5 0
3 years ago
train travelling at a uniform speed covers a distance of 255 km in Find the speed of the train and 3 4/5 1 1/2 the distance cove
serg [7]

The speed of the train is <u>150 km/hour</u>.

The distance covered by the train in 3 4/5 hours is <u>570 km</u>.

The speed of a body is calculated using the formula, <u>speed = distance/time.</u>

The distance covered is calculated using the formula, <u>distance = speed*time</u>.

The time taken by a body is calculated using the formula, <u>time = distance/speed</u>.

In the question, we are asked for the speed of a train, when it covers a distance of 225 km in 1 1/2 hours.

Distance = 225 km.

Time = 1 1/2 hours = 1.5 hours.

<u>Speed = Distance/Time</u> = 225/1.5 km/hour = 150 km/hour.

Now, we are asked to calculate the distance covered by the train in 3 4/5 hours.

Speed = 150 km/hour.

Time = 3 4/5 hours = 3.8 hours.

<u>Distance = Speed*Time</u> = 150*3.8 km = 570 km.

Thus, the speed of the train is <u>150 km/hour</u>.

The distance covered by the train in 3 4/5 hours is <u>570 km</u>.

The provided question is incorrect. The correct question is:

"A train at a uniform speed covers a distance of 225 km in 1 1/2 hours. Find the speed of the train and the distance covered in 3 4/5 hours.

Learn more about speed, time, and distance at

brainly.com/question/17146782

#SPJ1

6 0
2 years ago
1/2a + 5(3a + 3/2<br><br> Please help
Morgarella [4.7K]

Answer is below in picture

enjoy your day

8 0
3 years ago
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