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k0ka [10]
3 years ago
10

Simplify (6x2 - 3 + 5x3) - (4x3 - 2x2 - 16​

Mathematics
1 answer:
Masteriza [31]3 years ago
8 0

Answer:

x^3 +8x^2 +13

Step-by-step explanation:

(6x^2 - 3 + 5x^3) - (4x^3 - 2x^2 - 16​)

Distribute the minus sign

6x^2 - 3 + 5x^3 -4x^3 + 2x^2 + 16​

Combine like terms

x^3 +8x^2 +13

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A tax assessor wants to assess the mean property tax bill for all homeowners in a certain state. From a survey ten years ago, a
Jet001 [13]

Answer:

The answer is below

Step-by-step explanation:

From the table, the mean (μ) = 1390.75 and the standard deviation (σ) = 518.75

The confidence level (C) = 90% = 0.9

α = 1 - C = 1 - 0.9 = 0.1

α/2 = 0.1 / 2 = 0.05

The z score of α/2 (0.05) is the same as the z score of 0.45 (0.5 - 0.05) which is equal to 1.645.

The margin of error (E) is given as:

E=Z_\frac{\alpha}{2}*\frac{\sigma}{\sqrt{n} }  \\\\E=1.645*\frac{518.75}{\sqrt{14} } =228.07

The confidence interval = μ ± E = 1390.75 ± 228.07 = (1162.68, 1618.82)

The confidence interval is between 1162.68 and 1618.82.

7 0
3 years ago
In the state of Arkansas, Muscadine grapes are a very popular fruit for making jam and jelly. Michael began growing the fruit mo
KatRina [158]

Answer:

The percentage of error in the question is 75%.

Step-by-step explanation:

To find the percentage of error, we need to subtract the actual value from the value that was expected, divide the result by the expected value.

He predicted that the crop would produce 8 bushels so this is our expected value. The actual value, which is the number of bushels produced, is 14.

  • If we make the calculation (14 - 8) / 8 = 6 / 8.
  • And then multiply the result by 100 to find the percentage, (6 / 8) x 100 = 75.

So the percentage of error in the question is 75%.

I hope this answer helps.

6 0
3 years ago
What is the distance between the following points/ordered pairs, please answer all if possible
larisa86 [58]

Answer:

1. 19 units

2. 22 units

3. 9 units

4. 8 units

5. 11 units

Step-by-step explanation:

7 0
3 years ago
In what shape are lateral faces of a pyramid?
atroni [7]
<span> congruent isosceles triangles</span>
7 0
3 years ago
Pleeeeeeeeeeeeeeeeeeease i need this answer
geniusboy [140]

Answer:

12^2(Pi)+24*(Pi)*35

Step-by-step explanation:

12^2(Pi)+24*(Pi)*35

4 0
3 years ago
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