Andre and Elena are solving this system of equations: equation 1: y=3x
equation 2: y=9x - 30
Andre's first step is to write: 3x = 9x – 30
Elena's first step is to create a new system:
new equation 1: 3y = 9x
new equation 2: y= 9x - 30
Do you agree with either first step? Explain your
reasoning.

1,407.5 hours

step-by-step explanation:

we first convert all the time to hours and then sum them up.

there are 24 hours in 1 day, in 58 days, there are 24 x 58 = 1,392 hours.

there are 60 minutes in 1 hour, thus, 30 minutes will be equivalent to 30 / 60 = 0.5 hours.

therefore, the number of hours it will take mercury to complete a full rotation is 1,392 + 15 + 0.5 = 1,407.5 hours

i those same problems in math and dont know how to do them

-3.5 is the distance.

i've had this question so choose the one in the absolute value sign.

parallel lines have the same slope. so if the green line has a slope of -4, the slope of the red line is also -4.