CPhill

−9x+4y=55

−11x+7y=82

Multiply the top equation  through by  7  and the bottom equation through by  -4   and we get

-63x + 28y  =  385     (1)

44x  - 28y   = -328     (2)

Add (1)  and (2)  and we have

-19x   = 57    divide both sides by  -19

x  = -3

And using   -9x + 4y  =  55   we can find y  as

-9(-3) + 4y  = 55

27 + 4y  = 55   subtract 27 from both sides

4y  = 28   divide both sides by 4

y  =  7

So  ....(x,y)  = ( -3, 7)

I would say  →  A

Automatically debiting your account  is the same as an immediate payment  of cash

$325  is between  $300 and $400

Go down to this row and  look  under the "0" column  for no exemptions   →   $7

Now go over to the  "2"  column for 2 exemptions  and note that the amount is  →  $2

So....his weekly withholdings will be  [ $7  - $2 ]   =  $5  more → "C"

If she saves 7%.....this is  .07 * 60,530  = $4237.10

The company matches 1/2  of this=  4237.10 * 1/2 =  $ 2118.55

Well...50  is the closest.....but it's still not correct....

50 * 10   =  $500   

time and a half  = 1.5

Total earnings  =     40 hours * $6.20   +  2.5 hours  *  ( 6.20 * 1.5)   =

40 (6.20)  + 2.5(6.20* 1.5)   =  $271.25

None of those answers, NSS  !!!!

If the employee makes $10 per hr....he/she will need to  work 60 hrs to earn $600  →  60 * 10   = 600

This is essentially the same as  finding the slope....Let  x be the minutes and y be the  miles

So  we  have the following  (x, y)  points  [ we only need two ]  ...(3,36)  and ( 5 , 60 )

Slope  =  change in  miles /  change in  minutes  =    (  60 -36 )  /  5 - 3 )   =   24 / 2  =   12  (miles per minute)  →  D

I assume that we want to find the slope...pick any two  points....I'll choose (0,2)  and ( 5,0)

Slope =   [ 2 - 0 ] / [ 0 - 5 ]  =  2  / -5   =   -2/5  →  A

Pick any two points on the graph...let's say  (0 , 300)  and (4,0)

To find the rate of change....Find the slope between these points :    [ 300 - 0 ] / [ 0 - 4 ]  =  300 / -4  =  -75

This is in 100s....so  the rate of change  =   -75 (100)  = -$7500  → the value drops $7500 per year