Some friends are going on a coaster ride at an amusement park. They board their car on a platform that is 12 and one fourth
feet above the ground. The car starts by going up 100 and one fourth
feet. Then the car goes down 30 and one half
feet and comes to a stop. What is the change in height from where the friends started on the platform to where they are when the car stops?

80%

step-by-step explanation:

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step-by-step explanation:

step-by-step explanation:

2y+y=5

add 2y and y