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gtnhenbr [62]
3 years ago
6

-3xy^2+5xy^2 Operations with polynomials

Mathematics
1 answer:
8090 [49]3 years ago
3 0

9514 1404 393

Answer:

  2xy^2

Step-by-step explanation:

The terms are "like" so can be combined. It might be helpful to think of this as an application of the distributive property.

  -3xy^2 +5xy^2 = (-3 +5)xy^2 = 2xy^2

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A national dental association conducted a survey to find the average (mean) amount of time dentists spend on dental fillings per
eduard

Answer:

The probability of finding a sample mean less than 18 hours is 0.0082

Step-by-step explanation:

To find the probability of finding a sample mean less than 18 hours, we need to calculate the z-score of this sample mean 18. And the probability of finding a sample mean less than 18 hours is P(z<z(18)).

Z-score can be calculated as follows:

z(18)=\frac{X-M}{\frac{s}{\sqrt{N} } } where

  • X is the sample mean (18 hours)
  • M is the average hours dentists spend per week on fillings (20 hours)
  • s is the standard deviation (10 hours)
  • N is the sample size (144)

Putting the numbers, we get:

z(18)=\frac{18-20}{\frac{10}{\sqrt{144} } }=-2.4

Using z- table we can find that P(z<z(18)) = 0.0082

4 0
3 years ago
What is 8×5 and 5×8 cause they said 20
11111nata11111 [884]

It is 40 because 8*5 is 40

6 0
3 years ago
Read 2 more answers
Please help ASAP <br> I really need help please will name you the brain
MAXImum [283]

Answer:

I believe answer B

Step-by-step explanation:

It says shifted UP 3 units and 2+3=5 so that is my answer. Feel free to yell at me if I am wrong.

8 0
3 years ago
15 points! Thank you
Pepsi [2]

10x^2+27x-28=10x^2+35x-8x-28=5x(2x+7)-4(2x+7)\\\\=(2x+7)(5x-4)\\\\Answer:\ D.\ 2x+7

5 0
3 years ago
Read 2 more answers
What is the sales price of a $18.95 football with a 15% discount?
skelet666 [1.2K]
$18.95 x 15/100 is equal to 2.84

18.95 - 2.84 is equal to $16.11

Hope that helped! :)
7 0
3 years ago
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