A cattle train left Berlin and traveled toward Las Vegas at an average speed of 45 km/h.
Some time later a diesel train left traveling
in the same direction but at an average
speed of 70 km/h. After traveling for nine
hours the diesel train caught up with the
cattle train. Find the number of hours the
cattle train traveled before the diesel train
caught up.

the answer to the question is a  

it has the same slope and the same y-intercept.

step-by-step explanation:

always plug in x. in this case, x equals 4.

i'm going to first solve 4(2+3x)

1) 4(2+3(4)) use pemdas to solve.

i'm going to multiply whats in the parenthesis first, so 3 times 4=12.

2)4 (2+12) i'm then going to multiply 4 by both numbers in the parenthesis (because multiplying comes before adding)

4 times 2= 8.   4 times 12= 48

4) (8+48)= 56 (answer)

i'm then going to solve 8+12x and plug in 4 for x.

1) 8 +12(4)

multiplying comes before adding, so i'm gonna multiply 12 and 4.

12 times 4= 48.

2) 8+48=56

both equal the same!

answer: evaluate the objective function at each vertex to determine which - and -values, if any, maximize or minimize the function. example: find the minimum value and maximum value of the objective function f ( x , y ) = 4 x + 5 y , subject to the following constraints

range is infinite on both x and y axis positive and negative

step-by-step explanation: