ElectricPavlov

$15 x 40  x   1.10 = $660 /wk

C  1 and III  only

they both look like sine waves don't they?   Yah......

What do you want to do with that?  

Then just plot the whole numbers in the list.....and connect the dots as I explained....the lines will be the same....GLuck !

The dowel will be the hypotenuse of a right triangle with legs 180 and 195 mm

d^2 = 180^2 + 195^2        d = 265.38   is the amount of dowel in the paint     remainder out of the paint

    is equal to  270 - 265.38 =4.62 mm

40 -10 = 30 dollars      now he gets a 20% discount form 30 dollars

30 - .2(30) = $24    Final price

that is 16 dollars off full price     16/40 x 100% = 40% off

This was answered the other day.....

if the discriminant is less than zero it will not be a real number

x^2+bx+2 = -2

x^2+bx+4 = 0           discriminant is   b^2 - 4(ac)  =   b^2 - 4(1)(4)     if this is less than zero it will meet the requirements of your Q

b^2-16 <0

b^2 <16

b< +-4        so the interval is        (-4,4)

These are both equations of lines, with a common point at    3,-6      extend the blue line to the left.......and starting at the far right blue dot, extend the line through the red dots down and to the right

x will be the pages he needs to read in each of 7 days to complete the book..... he has read 55 pages of the book already....so he has 300- 55= 245 pages left to read in 7 days       245/7 = 35 pages a day to complete the book in 7 days:

7x+55 >=300      subtract the 55 pages he has read from both sides

7x>=245               now divide by 7 days

x >= 35         he has to read at least 35 pages each day to finish in seven days

Read your question......you left off the really important relationship between y  and z.