Ineed with setting up the equation, because i really don't understand how to set up word problems involving linear system equations, really could use the ,

1. (by hand) 0.3 + 0.2x = T

2. (machine) 0.4 + + 0.05x = T

Step-by-step explanation:

we are trying to solve for the amount of time (T) to milk Cows. so T will be our answer.

next we know that it takes 0.3 hours to setup for hand milking and 0.2 hour to milk each cow.

in order to find our total time (T) we add the time it takes to setup and the time it takes to milk all the cows.

however because we don't know how many cows there are, we use a variable (x) multiplied by the time it takes (0.2) to milk each to represent cow milking time.

so ultimately we get 0.3 + 0.2x = T

basically most linear equations boil down to an initial value, in this case 0.3 or 0.4, and a rate of change, + .2 hours per cow or + .005 hours per cow.

the rate of change is the one with the variable attached.

blue marble is 15 times out of 50 = 15/50 reduces to 3/10

landing on tails is 24 out of 50 = 24/50 reduces to 12/25

to find the probability of both multiply together:

3/10 x 12/25 = 3 x 12 / 10 x 25 = 36/250

if you multiplied the numerator and denominator by 10 you get 360/2500.

the answer is 360/2500

answer: 91

step-by-step explanation: