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lawyer [7]
3 years ago
6

I need help -7y^2-2y^2+y^3-3y-2y+5y^3-2y

Mathematics
1 answer:
kari74 [83]3 years ago
5 0

Answer:

6

3

−

9

2

−

7

Step-by-step explanation:

Combine like terms

−

7

2

−

2

2

+

3

−

3

−

2

+

5

3

−

2

{\color{#c92786}{-7y^{2}}}{\color{#c92786}{-2y^{2}}}+y^{3}-3y-2y+5y^{3}-2y

−7y2−2y2+y3−3y−2y+5y3−2y

−

9

2

+

3

−

3

−

2

+

5

3

−

2

Combine like terms

−

9

2

+

3

−

3

−

2

+

5

3

−

2

-9y^{2}+y^{3}{\color{#c92786}{-3y}}{\color{#c92786}{-2y}}+5y^{3}{\color{#c92786}{-2y}}

−9y2+y3−3y−2y+5y3−2y

−

9

2

+

3

−

7

+

5

3

Combine like terms

−

9

2

+

3

−

7

+

5

3

-9y^{2}+{\color{#c92786}{y^{3}}}-7y+{\color{#c92786}{5y^{3}}}

−9y2+y3−7y+5y3

−

9

2

+

6

3

−

7

Rearrange terms

−

9

2

+

6

3

−

7

{\color{#c92786}{-9y^{2}+6y^{3}-7y}}

−9y2+6y3−7y

6

3

−

9

2

−

7

Solution

6

3

−

9

2

−

7

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I think it is 4%?
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If the mean, median and mode of a distribution are 5, 6, 7 respectively, then the distribution is:
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<span>the distribution is 43

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John can ride his skateboard 100 feet in 4.6 seconds. How fast is this in miles per
cricket20 [7]

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about .24 mile per hour

1 mile is 5280 foot

Step-by-step explanation:

5 0
3 years ago
The American Bankers Association reported that, in a sample of 120 consumer purchases in France, 48 were made with cash, compare
tatuchka [14]

Answer:

Step-by-step explanation:

Hello!

You have the information for two variables

X₁: Number of consumer purchases in France that were made with cash, in a sample of 120.

n₁= 120 consumer purchases

x₁= 48 cash purchases

p'₁= 48/120= 0.4

X₂: Number of consumer purchases in the US that were made with cash, in a sample of 55.

n₂= 55 consumer purchases

x₂= 24 cash purchases

p'₂= 24/55= 0.4364

You need to construct a 90% CI for the difference of proportions p₁-p₂

Using the central limit theorem you can approximate the distribution of both sample proportions p'₁ and p'₂ to normal, so the statistic to use to estimate the difference of proportions is an approximate standard normal:

[(p'₁-p'₂) ± Z_{1-\alpha /2} * \sqrt{\frac{p'_1(1-p'_1)}{n_1} +\frac{p'_2(1-p'_2)}{n_2} }]

Z_{0.95}= 1.648

[(0.4-0.4364)±1.648 * \sqrt{\frac{0.4(1-0.4)}{120} +\frac{0.4364(1-0.4364)}{55} }]

[-0.1689;0.0961]

The interval has a negative bond, it is ok, keep in mind that even tough proportions take values between 0 and 1, in this case, the confidence interval estimates the difference between the two proportions. It is valid for one of the bonds or the two bonds of the CI for the difference between population proportions to be negative.

I hope this helps!

8 0
3 years ago
What is the equation of the line in slope intercept form through (-5,-3) and (6,1) ?
erastovalidia [21]

y - y1 = m (x - x1)

where m is the slope and (x1 , y1) is the point given

m = (y2-y1)\(x2-x1)

we have  <span>(-5,-3) and (6,1)

so: m = (1- -3) / (6- -5) = (1+3)/(6+5) = 4/11

and the equation of the line is:
</span>y - y1 = m (x - x1)
y-1 = 4/11 (x-6)

simplify:

y = 4/11 x - 24/11 +1

y= \frac{4}{11} x -  \frac{13}{11}

I hope that helps!



8 0
2 years ago
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