Which two lines are perpendicular? A
2x−6y=−12

and

3x−y=−5

B
6x−15y=−60

and

2x−5y=10

C
2x+5y=7

and

−6x−15y=−21

D
y=2

and

2x−3y=10

E
2x−3y=12

and

3x+2y=10

Mary spent a total of $323.14 for a party.she spent a total of $200.22 on food,plus an additional $30.73 for each hour of the party.how long was the party?

In the diagram, the ratios of two pairs of corresponding sides are equal to prove that almn - axyz by the sas similarity theorem, it also needs to be shown that x 6 z un z zz un = 2x zləzz lezy

Find the magnitude, correct to two decimal places, made by each of the following with positive direction of the x axis a) y= x the answer is 45° but i don’t know how