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Snowcat [4.5K]
3 years ago
10

Simplify (3a^4-2a^2+5-10)-(2a^4+4a^2+5a-2)

Mathematics
1 answer:
katrin [286]3 years ago
7 0

Answer:

Step-by-step explanation:

3a^4 -2a^2 + 5 - 10 -(2a^4 +4a^2 + 5a -2)

as given.. i'm wondering if the 5 in the first group is really 5a.. hmmm

I'm guessing that it is...  soooo distribute the minus sign

= 3a^4 - 2a^2 +5a -10  -2a^4 -4a^2 -5a +2

= a^4 -6a^2 -8   :)  voila that's your answer

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What is the mean absolute deviation of the data set? Round to the nearest hundredth if necessary.
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The mean absolute deviation, rounded to the nearest hundredth, is: 11.67 calories.

<h3>How to Find the Mean Absolute Deviation?</h3>

To find the mean absolute deviation, find the mean of the data then find the average distance of each data point from the mean.

Given the data, 61, 42, 52, 27, 35, 23:

Mean = (61 + 42 + 52 + 27 + 35 + 23)/6

Mean = 240/6

Mean = 40

Mean absolute deviation = [(61 - 40) + ( 42 - 40) + ( 52 - 40) + ( 27 - 40) + ( 35 - 40) + ( 23 - 40) 6 = (21) + (2) + (12) + (13) + (5) + (17)] / 6 = 70/6

Mean Absolute Deviation = 11.67 calories.

Learn more about mean absolute deviation on:

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6 0
1 year ago
Solve with matrices. <br><br> 5x -3y = 18 and 2x + 7y = -1
muminat

We'll use Cramer's rule for 2 equations:

ax + by = e

cx + dy = f

5x -3y = 18 a=5 b=-3 e=18

2x + 7y = -1 c=2 d=7 f=-1

denominator determinant (dn) = (a * d) - (c * b) = 5 * 7 - (2 * -3) = 41

x = [(e * d) - (f * b)] / dn

[18 * 7 - (-1 * -3)] / 41 =

123 / 41 = 3

y = [(a * f) - (c * e)] / dn

= (5 * -1) -(2 * 18) / 41 =

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Source:

1728.com/cramer.htm

6 0
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Draw line ST intersecting plane M at point R
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Agenda:

r = radius
C = circumference
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<span>√ = square root
</span>
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