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Alik [6]
2 years ago
13

Please help. I need to know the strategy, the correct work, and to identify the error.

Mathematics
1 answer:
zysi [14]2 years ago
7 0

Answer:

See below

Step-by-step explanation:

13x + 5 + 17x - 4.5 + x

NOTE: You can only add/subtract LIKE terms . Here we have  variable terms in x  (13x , 17x and x) and 2 constants ( 5 and 4.5).

Sarah's next line is

18x + 17x - 4.5 + x

This is incorrect . It looks like she  added 13x + 5 and got 18x!! Which is of course wrong because they are NOT LIKE terms. 5 is a constant and 13x is a variable term in x.

The third line is correct:-

35x - 4.5 + x.

She has added the 2 variables 17x and 18x.

Fourth line  is  30.5x + x. She's at it again - Trying to subtract 4.5 from 35x .

Last line 31.5x

She has added  the 2 terms in x correctly, but the final answer is wrong of course due to the earlier errors.


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Use the Law of Sines to find the value of a, as follows:

sin 50 deg      sin 62 deg
-------------- = ----------------
       a                  31 cm
                                                          31sin 50        31(0.766)
Then 31sin 50 = a*sin 62, and a = --------------- = ---------------- = 26.9 cm
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a = 
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3 years ago
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What is the perimeter of a square which has the same area as a circle with circumference of 4π?
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A researcher reports an F-ratio with df = 1, 24 for an independent-measures experiment. If all the treatments had the same numbe
Vsevolod [243]

Answer:

13 participants.

Step-by-step explanation:

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i.e. degrees of treatment between groups =1

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