y is inversely proportional to xWhen y = 7, x = 9a) Work out an equation connecting y and xb) Work out the value of y when x = 21

Grandpa ernie is shrinking! over the past 4 years his height decreased by a total of 2.4 cm.it decreased by the same amount each year. what was the change in grandpa ernie's height each year

2f(x)= x+3 if 4 < x < 8 2x if x 28 2

This size running track is usually called a 400 meter track. however if a person ran as close to the inside as possible on the track they would run less than 400 meters in one lap. how far away from the inside border would someone have to run to make one lap equal exactly 400 meters