The values in the table change by $3.80 from one line to the next. Since each change from line to line changes in number of photos by 20, the average cost per photo is $3.80/20 = $0.19. There is apparently a $5.80 -3.80 = $2.00 shipping charge for numbers of photos in the range shown in the table.

Thus, the piecewise function has 3 pieces:

for x < 100: $2.00 + 0.19x

for x < 200: $4.50 + 0.17x

for x ≥ 200: $0.15x

This could be written as ...

$C(x)=\left\{\begin{array}{rcl}\$2.00+0.19x&\text{for}&0\le x$

8 0

3 years ago

Brandon drew a scale drawing of a hotel. a room in the hotel is 18 inches wide in the drawing. the actual room is 12 feet wide,

Contact [7]

3inches=1 1/2 feet I believe but I'm not to sure about it you will have to the math this is just my answer to you guys sorry if its wrong at least I tried

3 0

3 years ago

Can someone solve these simultaneous equations and explain the way to do this easily:

N76 [4]

The easiest way to solve this system of equations is by elimination. Both equations have a 3x term, so we can basically subtract the equations to cancel the 3x. Then we will be left with a single variable to solve for.

(3x + y = -4)
-(3x -4y = 6)

Distribute the negative:

(3x + y = -4)
(-3x + 4y = -6)

Now add the equations together term by term:

0x + 5y = -10

5y = -10

y = -2

Plug y = -2 into either equation to find x.

3x + (-2) = -4

3x = -2

x = -2/3

So the answer as an ordered pair is (-2/3, -2)

8 0

3 years ago

A polygon is 18 In, 9 in , 18 in, 36 in ,and 18 in what is the area​

A polygon is 18 In, 9 in , 18 in, 36 in ,and 18 in what is the area