Eliminate y's
mulitply 2nd equation by 2 and add to first
7x-2y=-6
<u>16x+2y=6 +</u>
25x+0y=0
25x=0
x=0
huh
subsitute
8x+y=3
8(0)+y=3
y=3
(x,y)
(0,3) is soltuion
Answer:
x=11, y=10
Step-by-step explanation:
x= 6+ (1/2)y
x+y=21
substitute the first equation into the second equation:
(6+ (1/2y)) + y =21
to get:
y=10
then to find x:
x+ 10 = 21
x=11
Answer:
12
Step-by-step explanation:
yes right anwser
Answer:
See below
Step-by-step explanation:
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 ...
