In 2017, the entire fleet of light‑duty vehicles sold in the united states by each manufacturer must emit an average of no more than 91 milligrams per mile (mg/mi) of nitrogen oxides (nox) and nonmethane organic gas (nmog) over the useful life (150,000 miles of driving) of the vehicle. nox ++ nmog emissions over the useful life for one car model vary normally with mean 88 mg/mi and standard deviation 4 mg/mi.(a) what is the probability that a single car of this model emits more than 91 mg/mi of nox ++ nmog? (enter your answer rounded to four decimal places.)probability - ? (b) a company has 16 cars of this model in its fleet. what is the probability that the average nox ++ nmog level x¯x¯ of these cars is above 92 mg/mi? (enter your answer rounded to four decimal places.)probability - ?

{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

0

step-by-step explanation:

equals the constant of proportionality.

solve for

so mark-up is 0.4 multiplied by 180 = 72

the unknown side length of the golden rectangle with the given side length l = 9 is s = 5.56  

i did this question today

step-by-step explanation: