Solve this system of equations using the graphing method

y=-1/3x+5
y=-2x

Suppose a least-squares regression line is given by modifyingabove y with caret equals 4.302 x minus 3.293. what is the mean value of the response variable if xequals20?

If 10 men take 18 days to mow 60 acres of grass, how long will 15 men take to mow 80 acres?

Write the rational number in lowest terms 99/-15