ElectricPavlov

I'd say you got  A correct

B   (5500-1000x)   is the candy bars they will sell

        (5500-1000x)(.75 + .50 x )  is the profit

        4125 + 2750 x - 750x - 500x^2 = profit

         -500 x^2 + 2000x + 4125 = profit

C 1 dollar is   50 (2)    x= 2

       -500(2^2) + 2000(2) + 4125 = $6125

D This equation is an upside down parabola

        max = -b/(2a)  =  -2000/-1000  = 2 = x

E the profit will be as found for x = 2   in C

Here is the graph  :

35/3  * 8/8 =  280/24

63/8  * 3/3 = 189/24

GCF of 280 ND 189 IS ?   

    Answer ' 7'

so use 7/24  x 7/24 m tiles         280/24 x 189/24 = 91.875 sq m

                                                               91.875m^2/ (7/24 * 7.24)m^2/tile = 1080 tiles   (40 x 27 tiles)

-2/3  /  3 3/4

3 3/4 = 15/4

-2/3  /  15/4 ======   -2/3 * 4/15 = -8/45

Welllllll......here is a graph.....

16/(y/2) = 16 * 2/y = 32/y

56cl per 3 l water

12 l of water is 4 of these   (4 x 3 = 12)

12 l + 4 * 56cl

12l + 224 cl   = 12l + 2l + 24/100 l= 14.24 l

Let's write the equation we are looking for as

y= mx + b       the slope of the original equation is  -4

y=-4x + b        Substitute in the point 1,-2 to calc 'b'

-2 = -4(1) + b

2=b

so     y = -4x + 2

NOW this question makes sense......we had it posted yesterday as 140 pillows.

Number of pillows per row =  (2r-1)       r = number of rows

total pillows =     (2r-1)(r) = 120

2r^2-r-120 = 0        Use Quadratic Formula to find   r = 8   ( and -7.5 which we will toss out)

Pillows per row = 2r-1 = 15 pillows/row     8 rows

Square area of the whole framed picture = 32 x 29 = 928 in^2

928-550 = 378 in^2  = area of frame

32 x 29 -( (32-x) (29-x)) = area of frame= 378 in^2    where x = 2 times the width of the frame

928 - x^2 + 61x - 928 = 378

-x^2+61x-378 = 0     Use Quadratic Formula to find x = 54 or 7    (54 is too big...toss it out)

x = 7     width = 1/2 x = 3.5 inches

As a check....does the inside dimension of the frame = the picture size of 550 in^2 ?

(32-7)(29-7) = 550     Check!

Back in a few....making corrections to my calcs..