Last year, Tim rode his bike a total of 50 3/8 miles. This year, he rode his bike a total of 258 3/4 miles.
Which of the following explains about how much farther Tim rode his bike this year than last year?

A. About 200 times farther; Subtract last year's distance from this year's distance to get 208 3/8. Then round to the nearest hundred to get 200.

B. About 50 times farther; Round each distance to the nearest whole number.
Then multiply last year's distance by 50 to see that 259 is close to 50 x 5.

C. About 10 times farther: 258 is about 5 times 50,and 3/4 is 2 times 3/8, so multiply 5 x 2 to get 10.

D. About 5 times farther, Round each distance to the nearest whole number.
Then multiply last year's distance by 5 to see that 259 is close to 50 x 5.

what is the answer?

{x = -1/2 ,   y = -1

step-by-step explanation:

solve the following system:

{2 x + y = -2

{10 x - 3 y = -2

in the first equation, look to solve for y:

{2 x + y = -2

{10 x - 3 y = -2

subtract 2 x from both sides:

{y = -2 x - 2

{10 x - 3 y = -2

substitute y = -2 x - 2 into the second equation:

{y = -2 x - 2

{10 x - 3 (-2 x - 2) = -2

10 x - 3 (-2 x - 2) = (6 x + 6) + 10 x = 16 x + 6:

{y = -2 x - 2

{16 x + 6 = -2

in the second equation, look to solve for x:

{y = -2 x - 2

{16 x + 6 = -2

subtract 6 from both sides:

{y = -2 x - 2

{16 x = -8

divide both sides by 16:

{y = -2 x - 2

{x = -1/2

substitute x = -1/2 into the first equation:

{y = -1

{x = -1/2

collect results in alphabetical order:

answer:   {x = -1/2 ,   y = -1

i think it will be zero as slope has a formula of difference between initial and final distance divided by itz time interval