Question

Jen Planted a 7 ft tee, tree grows 3 ft each year. Now tree is 4times original height. How many year ago was tree planted.
Is the equation y=3x+7 right, where y= 7*4 and x= no of years
Yes


y = 3 x + 7 = 4 * 7 = 28

3 x + 7 = 28

3 x = 28 - 7 = 21

x = 21 / 3 = 7 yrs


7 ft + 7 * 3 ft = 7 ft + 21 ft = 28 ft = 4 * 7 ft

Related Questions

A tree grows 2.80 m during the first year since it was planted. During each subsequent year the tree... A person has a tree in his backyard. The tree grows 40 centimeters each year. Since the tree started... Earth has more than 60,000 tree species. Each look different and grows at a different rate. Pick a t... Mister more planted a tree in his backyard his tree with three and one third feet over 5 years if hi...