"Affordable" Diamond Pricing Imagine you have set out to purchase a diamond, and you want all the
information you can possibly get before the purchase. You run an Internet
search on diamonds to learn more about the different cuts, carat ranges, color
values, and so on. After having researched a bit, you've decided on the basic
cut, quality, color, and weight range that you can probably afford.
This diamond pricing spreadsheet e gives three snapshots of a large set of
data on diamond pricing. The 0.30-0.40 Carats tab gives the 2012 data on
diamonds ranging from 0.30 to 0.40 carats.
Part A
Go to the Subset tab, which gives a subset of randomly chosen data from the
first tab. Go to your Math Tools and open the Graph tool. Plot the data of
weight (carat) versus price in this tab using the +Data button (Note that you
can copy two columns of data and use "paste table data"). Export an image of
the plot, and paste it in the space below. Find the equation of the regression
line (using a Best Fit Linear relationship) and the value of the correlation
coefficient (0)

b mark me branliest thx

step-by-step explanation:

if you was gonna solve for a, a is a   < -12

step-by-step explanation: so we look at the formula un = a + (n-1)d

un is the amount of seats

n is the nth term aka row number

a is the original sequence/row number

d is the difference between each term

so in this a=22 d=6 and n can remain as n because we are simply formjng a rule

lets put these in the equation

un=22+(n-1)(6)

this is your answer to part a

however

lets double check that this is correct, we'll try putting it into the second term

un=a+(n-1)d

u2=22+(2-1)(6)

u2=22+6

u2=28

as the question said the second row has 28 seats so now we know the formula we made is correct.

as for part b

un=a+(n-1)

its asking us to find a row with 100 seats.

remember un was the amount of seata so all we do is substitute this in.

un=100 a=22 d=6

un=a+(n-1)d

100=22+(n-1)(6)

so now we simplify to find n which is the row number.

100-22=22+(n-1)(6)-22

78=(n-1)(6)

78/6=(n-1)(6)/6

13=n-1

13+1=n-1+1

14=n

so now we know that in the 14th row there is 100 seats.

hope this and that you understood! its my first time using the app or anyone out on here : p its also me to revise so a bunch! ask more questions if you dont understand ☺

x² + 11x + 18 < 0  

[-11 ± sqrt(121 - 72)]/2 = (-11 ± 7)/2  

solution: (-9, -2)

step-by-step explanation: