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grandymaker [24]
3 years ago
8

Solve: 10c + 20 = 40

Mathematics
2 answers:
Natali5045456 [20]3 years ago
8 0
Subtract 20 from 40 then divide by 10

C=2
Rufina [12.5K]3 years ago
6 0

Answer:

c=2 I believe

Step-by-step explanation:

20 -40 =20

then 10c =20 then you divide 20 by 10 and you get 2

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Read 2 more answers
Number 18 pls help me
Harman [31]
Lila did it correctly. The answer is 324

Following PEMDAS, we first focus on the parenthesis. So we simplify 9-3 to get 6

So we go from 
18*4^2+(9-3)^2 
to 
18*4^2+6^2 

The next step is applying exponents. In this case, squaring the terms, so we go from
18*4^2+6^2 
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Next is multiplying
18*16+36
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Finally, add up 288 and 36 to get 288+36 = 324

That confirms that Lila is correct

----------------------

The error that Rob made is that he computed 18*4^2+9^2-3^2 but it is NOT correct. Saying (x-y)^2 = x^2-y^2 isn't a true equation for all x and y. Again you have to simplify what is in the parenthesis first, and then you can square it. Or you must use the FOIL rule to expand out (9-3)^2


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3 years ago
What is the area of the parallelogram?
Xelga [282]

Answer:

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