Ok so im in highschool and we started doing this thing called "multi - steps" i dont really get it so could you guys me. the equation is 2(7v-3)=-118

v=-8

Step-by-step explanation:

You first distribute.

(2*7v)+(2*-3)=-118

14v-6=-118

Then you add 6 on both sides of the equation so you cancel out the -6 and the equation becomes

14v=-112

then you divide 14 on both sides to get v by itself

14v/14= v

-112/14=-8

so you get v=-8

you can check if the answer is correct or not by plugging the v in.

x = -3

y = -18

step-by-step explanation:

to solve by substitution, substitute one variable and solve for the other. then substitute again to find the remaining variable.

x-1/3(3x-9) = -3 since y=3x-9 substittute y.

x-1/3(3x-9)=-3

x + x +3 = -3

2x+3=-3

2x+3-3= -3-3

2x=-6

x=-3

substitute again into y=3x-9

y=3(-3)-9

y=-9-9

y=-18

54 km / hours

step-by-step explanation:

we need to convert seconds to hours

60 seconds = 1 minutes

60 minutes = 1hour

15 m         60 second   60 minutes

  * *         = 54000 meters/ hour

second     1 minute             1 hour

now we need to convert meters to km

1000 m = 1 km

54000 m       1 km

*   = 54 km / hours

hour               1000m