Question

Help please!!
Which statement justifies that 2x2 + x - 3 multiplied by x2 - 3x - 2 obeys the closure property of multiplication?

The result 2x4 - 5x3 - 10x2 + 7x + 6 is a polynomial.
The result 2x4 - 5x3 - 10x2 + 7x + 6 has a degree of 4.
The result 2x4 - 3x2 + 6 is a trinomial.
The result 2x4 - 3x2 + 6 has a degree of 4.

Answer 1

The 3rd one
If you multiply 2 polynomials together, you get another polynomial
So, the set of all polynomials are closed with respect to multiplication

Answer 2

thank you!

Answer 3

thanx for the medel

Answer 4

yeah np. can you help me on one more? :)

Answer 5

it is not the 3rd one

Answer 6

yeah sure

Answer 7

@vita955

Answer 8

its kinda a big problem.. lol.. hold on

Answer 9

The result 2x4 - 5x3 - 10x2 + 7x + 6 is a polynomial.

Answer 10

oh okay take ur time

Answer 11

The table represents data collected on the time spent studying (in minutes) and the resulting test grade.
Time Spent Studying (min)
52
37
31
9
26
40
22
10
45
34
19
60
Grade on Test
95
84
72
58
77
86
72
43
90
81
62
98
Part 1: Create a scatter plot with the predicted line of best fit drawn on it. Determine the type of correlation (if any) and predict the model that will be used.

Part 2: Find the line of best fit for the data either by hand or using technology. Explain your method. Find the predicted score for each time listed in the table.

Part 3: Find the residuals and decide if your model is a good fit. Explain your method. (If your model is not a good fit, complete Part 2 again with a different set of points or choose a different model.)

Answer 12

@jordanloveangel

Answer 13

@immanuelv

Answer 14

http://assets.openstudy.com/updates/attachments/53358d91e4b0b47fca854a82-brandonh4499-1396018790923-index.jpg

Answer 15

this is what a scatter plot looks like

Answer 16

http://mathbits.com/MathBits/TISection/Statistics1/LineFit.htm

Answer 17

this should help u a bit this is the best i can do

Answer 18

@vita955

Answer 19

ok thanks

Answer 20

did it help?

Answer 21

a lil i just have so much hw.. needed someone to help me on this one.

Answer 22

ill try to get u some help kk