michael duane johnson is a retired american sprinter who holds world records in the 200m, 400m, andx the 4x400 m relay. while setting his 200m world record, Johnson also reached the highest speed ever achieved by a human. he ran 200 meters in 19.32 seconds. how many miles per hour is this?

Answer is negative 2

The answer is (a) 12-2(-1)(6)2(6)=12

So the first thing we do is to multiply the top equation by 3. the reason i want to do this is i notice there will be a 6y on both equations and can possibly add/subtract them. so we get 6y = -3x + 27. adding that and the second equation we get 6x = 27-15 which is 12. divide by 6 and we get 2. ∴ x = 2. substituting 2 into the first equation we get 2y = -2 + 9 which is 7. divide by 2 and we get 7/2. ∴ y = 7/2, x = 2.

53 calories per serving