ElectricPavlov

Slope = rise / run   for the two points given

          =(8-0)/(7-9) = -4

so the equation of the line looks like   y = -4x + b      to find 'b' sub in one of the given points

                                                            0 = -4(9) + b     b = 36

y = -4x + 36       y intercept occurs when x = 0       y = 36              Y-intercept + slope = 36 -4 = 32

First disc red   2 out of 6 chance     2/6       The disc is not returned , so there is only 5 left in the bag:

Second disc blue   4 out of 5 chance  4/5

2/6 * 4/5 = 8/30 = 4/15

Not positive about the second part but there are only 2 possibilities    red blue   (which we already calc'd above )  and  blue red 

First blue   4/6

Second red 2/5     4/6 * 2/5 = 8/30 = 4/15

 added to the first result   4/15 + 4/15 = 8/15  for  any order

Pretty straighforward:

2^n = 1 000 000 00

n log2 = 8

n = 26.57 months

https://web2.0calc.com/questions/for-each-problem-below-solve-algebraically-then-use_2#r1

(x+4)(x-3) = 0    expand

x^2 +x -12 = 0

Look at your Negative z-score table .....look for a number close to 16% (.16)

I find   .99 z score is .1611

.99 x  standard deviation = .99 x 4 ~~ 4           73 - 4 = 69 

This question was submitted earlier ....it has an error in it somewhere

If we use  1.6%    look for number    .016 -ish      z -score -2.14

73  - 2.14 x 4 = 64.44     so I would go with the answer    'Scores below 65'     if it really is 1.6%    and not 16%

Or as Rom points out ....maybe it is the opposite end of the spectrum...the TOP 16% (and we were looking at it from the wrong perspective)

100% -16% = 84     look at positive z-score table for   .84 -ish  approx 1.0 standard deviations ABOVE the mean

      73 + 1 Standard deviation = 73+4 = 77 --------> choice #3   

    Thanx Rom!

(x^2-5x+4) * (x^3-1)  =     x^5 -5x^4 +4 x^3  - x^2 + 5x -4

Where is the 'figure' ?

It is written in standard form as far as I can tell     a =  -3/4     b = 0    c = 2

Perhaps your standard form dictates a positive leading coefficient with no fractions

3x^2 -8 = 0       a = 3   b = 0     c = -8

Yep....that is it