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kaheart [24]
3 years ago
11

Nine times the difference of a number and five is the same as 5 increased by nine times the number plus five times the number .

Find the number
Mathematics
1 answer:
horsena [70]3 years ago
8 0
9(x-5)=5+(9x+5x)
9x-45=5+14x
9x-14x=45+5
-5x=50
X=50/-5
X=-10
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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 
to
18*16+36

Next is multiplying
18*16+36
turns into
288+36

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


7 0
3 years ago
Polynomials!?!? What is the product of -2x^3+x-5 and x^3-3x-4... Is the product of -2x^3+x-5 and x^3-3x-4 equal to the product o
zaharov [31]
T<span>he product of -2x^3+x-5 and x^3-3x-4 would look like this before simplification:

-2x^6 + 6x^4 - 8x^3 + x^4 - 3x^2 - 4x - 5x^3 + 15 x^2 + 20

Now combine all the like terms.  For example, 6x^4 + x^4 = 7x^4.

Write the product in the simplest possible form, which involves combining like terms and arranging them in descending order by power of x.

</span>
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Rafael can run 5 laps around the track in 16 minutes. If he runs at the same rate, which of the following proportions can be use
kari74 [83]
The best answer is D) 5/16=20/m
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Lostsunrise [7]

Answer:

Which of the following is NOT a triangle congruence postulate or theorem?

4) none of these

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3 years ago
By what percent will a fraction CHANGE(not increase!!) if it’s numerator is decreased by 60% and it’s denominator is decreased b
Elena L [17]

if i was i your class or in bigger class i will help you

6 0
2 years ago
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