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zvonat [6]
3 years ago
15

Wich expression is equivalent to (3x^5+8x^3)-(7x^2-6x^3)

Mathematics
1 answer:
n200080 [17]3 years ago
6 0
(3x^5 + 8x^3) - (7x^2 - 6x^3) = 3x^5 + 8x^3 - 7x^2 - 6x^3 = 3x^5 + 2x^3 - 7x^2
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Write an equation of the line below.
statuscvo [17]

Answer:

y = -4x - 4

Step-by-step explanation:

Rise/Run

-8/2 = -4

Y-intercept:

-4

8 0
3 years ago
14) Solve for x:<br> 4 + 2(x + 3x) = 4 - x(2 - 3) + 2x<br> A) 0<br> B) 1<br> 2<br> D) 3
tester [92]

answer;

x=0

Step-by-step explanation:

4 + 2 (x + 3x) = 4 - x(2-3) + 2x

let remove d brackets

4 + 2x + 6x = 4 - 2x + 3x + 2x

llet collect like terms

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2 years ago
Answer the following questions.
serg [7]
39 is <span>312% </span>of 12.5

To find this you just divide 12.5 into 39 which gives you 3.12. To change that to a percentage you multiply by 100 which gives you 312%

7.5 is <span>102% </span>of 7.38

To find this you just divide 7.38 into 7.5 which gives you 1.0162, which I rounded to 1.02. To change that to a percentage you multiply by 100 which gives you 102%

I hope this helped! :)
6 0
3 years ago
What is the perimeter, in units, of polygon ABCDEF
PIT_PIT [208]

Answer:

30

Step-by-step explanation:

HOPE THIS HELPS

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7 0
3 years ago
Read 2 more answers
Keisha wants to estimate the percentage of managers at her company that hold an MBA. She surveys 320 managers and finds that 70
kondor19780726 [428]

Answer:

The margin of error is of 0.038 = 3.8%.

Step-by-step explanation:

In a sample with a number n of people surveyed with a probability of a success of \pi, and a confidence level of 1-\alpha, we have the following confidence interval of proportions.

\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}

In which

z is the zscore that has a pvalue of 1 - \frac{\alpha}{2}.

For this problem, we have that:

n = 320, \pi = \frac{70}{320} = 0.21875

90% confidence level

So \alpha = 0.1, z is the value of Z that has a pvalue of 1 - \frac{0.1}{2} = 0.95, so Z = 1.645.

The margin of error is:

M = z\sqrt{\frac{\pi(1-\pi)}{n}}

M = 1.645\sqrt{\frac{0.21875(1-0.21875)}{320}}

M = 0.038

The margin of error is of 0.038 = 3.8%.

6 0
4 years ago
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