Show the steps and solution explanations.
a. x+4y=6
x+4y=15

b. x+4y=7
3x +12y=21

c x-y=1
2x +y=4

Step-by-step explanation:

x+4y=6

x+4y=15

x+4y=6

-(x+4y)=-15

x+4y=6

-x-4y=-15

0=-9

no solution

No Solution

x+4y=7

3x+12y=21

simplify 3x+12y=21 into x+4y=7

Infinitely many solutions

x-y=1

2x+y=4

x=y+1

2(y+1)+y=4

2y+2+y=4

3y=4-2

3y=2

y=2/3

x-2/3=1

x=1+2/3

x=3/3+2/3=5/3

x=5/3, y=2/3. (5/3, 2/3).

step-by-step explanation:

the options are kind of confusing. i can tell you what i see going on here when i look at the graph.

the class and exam medians are closely related, and it looks like the low outlier on the exam did pull the median lower. [tex][/tex]

45

step-by-step explanation: