Which line contains the point (2,1)
4x-y=7
2x+5y=4
7x-y=15
x+5y=21

First option.

Step-by-step explanation:

To find which line contains the point (2,1), we can substitute the coordinates into each equation of the line provided in the options:

First option:

It contains the point (2,1)

Second option:

It does not contain the point (2,1)

Third option:

It does not contain the point (2,1)

Fourth option:

 It does not contain the point (2,1)

the anwser is d) 75°

step-by-step explanation:

8

step-by-step explanation:

just put √(2) * √(32) into a calculator. that will make the answer be 8.