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zheka24 [161]
3 years ago
5

The sum of (2a + ab + 2b) + (4a2 - 3ab + 9)

Mathematics
1 answer:
Sati [7]3 years ago
4 0
You can only add/subtract like terms so:

2a+ab+2b+4a^2-3ab+9

2a-2ab+2b+4a^2+9  (the only like terms were ab and -3ab)
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Sitting on a park bench, you see a swing that is 100 feet away and a slide that is 80 feet away. The angle between them is 30 de
leva [86]

We are given : Distance of the swing = 100 feet.

Distance of slide = 80 feet.

Angle between swing and slide = 30 degrees.

We need to find the distance between the swing and the slide.

Distance of swing, distance of slide and distance between the swing and the slide form a triangle.

We can apply cosine law to find the distance between the swing and the slide.

c^2 = a^2 +b^2  - 2ab cos C

c^2 = 100^2 +80^2 - 2(100)(80) cos 30°

c^2 = 10000 + 6400 -2* 8000 (\frac{\sqrt{3}} 2)}

c^2 = 16400 - 8000\sqrt{3}

c^2 = 16400 - 13856

c^2 = 2544

c =\sqrt{2544}

c= 50.44

c = 50 feet approximately.

<h3>Therefore, the approximate distance between the swing and the slide is 50 feet.</h3>
5 0
3 years ago
Read 2 more answers
The winner of a race ran the distance in 45s at an average speed of 9.6 m/s. The runner who came in last finished and 48 seconds
RSB [31]

Answer:

The answer to your question is speed = 9 m/s

Step-by-step explanation:

Data

Winner                                 Last runner

time = 45 s                           time = 48 s

speed = 9.6 m/s

Process

1) Calculate the distance they ran using the data of the winner

      speed = distance / time

-Solve for distance

      distance = speed x time

-Substitution

      distance = (9.6)(45)

-Result

      distance = 432 m

2.- Calculate the speed of the last runner

-Substitution

      speed = 432/48

-Result

     speed = 9 m/s

3 0
3 years ago
Joyce can type 60 words in five minutes. Robert can type 48 words in six minutes words who type at the faster and how many words
erik [133]

Answer:

joyce

Step-by-step explanation:

60/5 =12

48/6 =8

6 0
2 years ago
Which question could be answered by the organized list shown? Select two answers.
umka2103 [35]

Answer:

A and E

Step-by-step explanation:

5 0
3 years ago
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Rectangle DEFG is similar to rectangle LMNP .
Kay [80]

Answer:2.5 I just took the test


Step-by-step explanation:


5 0
2 years ago
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