Simplest form of the expression -2x2(x – 5) + x(2x2 – 10x) + x is

1 answer:

3 0

You first simplify the expression using PEMDAS
-2x^3-10x^2+2x^3-10x^2+x
then combine like terms,
(-2x^3+2x^3), (-10x^2-10x^2), x
cancels out^
so the answer would be -20x^2+x

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3x+2y=10 12x+5y=25 Solve by substitution or elimination

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3x + 2y = 10 ....multiply by -4
12x + 5y = 25
-------------------
-12x - 8y = -40 (result of multiplying by -4)
12x + 5y = 25
------------------add
-3y = - 15
y = -15/-3
y = 5

3x + 2y = 10
3x + 2(5) = 10
3x + 10 = 10
3x = 10 - 10
3x = 0
x = 0

solution is (0,5)

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Given that BD is the median of AABC and that AABC is isosceles, congruence postulate SSS can be used to prove which of the follo

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Answer:

Step-by-step explanation:

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Because of congruence of segments being reflexive, BD = BD.

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The number of flaws per square yard in a type of carpet material varies with mean 1.4 flaws per square yard and standard deviati

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According to the Central Limit Theorem, the distribution of the sample means is approximately normal, with the mean equal to the population mean (1.4 flaws per square yard) and standard deviation given by:
$\frac{\sigma}{ \sqrt{n} }=\frac{1.2}{ \sqrt{178} }=0.09$
The z-score for 1.5 flaws per square yard is:
$z=\frac{1.5-1.4}{0.09}=1.11$
The cumulative probability for a z-score of 1.11 is 0.8665. Therefore the probability that the mean number of flaws exceeds 1.5 per square yard is
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