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worty [1.4K]
1 year ago
8

Simplify the following expression 7a + 5b - 2a + b

Mathematics
2 answers:
Papessa [141]1 year ago
7 0
5a+6b would be the simplified answer
Juli2301 [7.4K]1 year ago
5 0

Answer:

<h2><u><em>5a + 6b</em></u></h2>

Step-by-step explanation:

Simplify the following expression:

Simplify the following expression:

7a + 5b - 2a + b =

5a + 6b

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Answer:

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Step-by-step explanation:

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20. The H.M. between 2 and 8 is<br>(1 marks )​
e-lub [12.9K]

Answer as an improper fraction = 16/5

Answer as a mixed number = 3 & 1/5

Answer in decimal form = 3.2

All of those values represent the same thing, but written in a different way.

=============================================================

Explanation:

I'm assuming HM stands for Harmonic Mean in this case.

If so, then we apply the reciprocal operation to each value to get 1/2 and 1/8 (from 2 and 8 respectively).

Add up those fractions:

1/2 + 1/8 = 4/8 + 1/8 = 5/8

Now we'll divide n = 2 over that result. The n = 2 refers to the number of items in the original set.

n divide over (5/8) = 2*(8/5) = 16/5 which is the answer as an improper fraction

-----------

To convert to a mixed number, we can do the following:

16/5 = (15+1)/5

16/5 = 15/5 + 1/5

16/5 = 3 + 1/5

16/5 = 3 & 1/5

Or if you need the answer in decimal form, then using a calculator would get you 16/5 = 3.2

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3 years ago
An ancient atifact is 4 time older then an anitque book
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You visit the Grand Canyon and drop a penny off the edge of a cliff. The distance the penny will fall is 16 feet the first secon
fiasKO [112]
The penny will fall 112 feet the fourth second, 144 feet the fifth second, and 176 feet the sixth second. Therefore, the penny will be a total of 576 feet from the cliff at six seconds.
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Help if you know how to do this- brainliestt
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Answer:

95.5°F

Step-by-step explanation:

Given the regression equation :

y = 1.8x - 76.9 ; the relationship between temperature (°F) and number of ice cream sold

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x = temperature (°F)

The temperature when 95 iccream cones are sold will be ;

Here, y = 95

Using the model :

95 = 1.8x - 76.9

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Divide both sides by 1.8

171.9 / 1.8 = x

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Hence, temperature when 95 cones of ice-cream are sold is 95.5°F

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2 years ago
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