I. 2a + 2b - c + d = -5 II. a + b + d = -2

III. 3a - b + 2c -d = 18

IV. 4b = -c

Hint:

Solve for c first in IV.

Solve for any variable in II next.

Solve I then.

Write an equation for the function that includes the points (1,4/5) and (2,2/3)

Write an equation of the line that passes through 9,2 and is parallel to the line y=5/3x+9

In dire need~! describe how to use area models to find the quotient 2/3 divided by 1/5. check your work by also finding the quotient 2/3 divided by 1/5 using numerical operations only.