Question

Last spring,you brought a tree,and planted it in your front yard.When you planted it,the tree measured 3 feet in height.The tree is supposed to grow and additional 1.5 per year.
Write an equation to represent the height,h after y years.
Use your equation to find how tall the tree will be after 5 years.
write and solve an equation to find out how many years it will take for the tree to be over 400 feet tall.

Answer 1

@e.mccormick

Answer 2

@iGreen

Answer 3

@e.mccormick

Answer 4

@bloofoffiction

Answer 5

h= 1.5y+3

Answer 6

do you know why?

Answer 7

because your trying to figure out the years for the 1.5 feet @bloofoffiction

Answer 8

yes so it would be the number of years times 1.5 plus the original 3 feet,

Answer 9

thats it. and to figure out how tall the tree would be in 5 years i would put h=5y+3

Answer 10

@bloofoffiction

Answer 11

Correct!

Answer 12

oh thank you @bloofoffiction

Answer 13

but how do i solve it

Answer 14

ok so you would multiply the number of years by 1.5, in this case 5

Answer 15

what do you get?

Answer 16

7.5

Answer 17

yes. Now add 3

Answer 18

10.5

Answer 19

yes

Answer 20

oh that was simple,haha stupid me

Answer 21

now for the last part. you already know the answer but you need to solve for the decimal. \[400= 1.5y+3\]

Answer 22

you need to isolate the variable.

Answer 23

do you mean 40

Answer 24

up top it says 400

Answer 25

oh srry i meant to put 40 @bloofoffiction

Answer 26

but i get the idea of what to do

Answer 27

ok. so it would look like. \[40= 1.5y+3\]

Answer 28

you need to make it so the only thing on the right side is the y variable.

Answer 29

Do you know how to do that?

Answer 30

so i would multiply 1.5 by 5 years add it by 3 and divide it by 40

Answer 31

or i +3 to the 40 and the answer would be divided by 1.5

Answer 32

No, the five isn't included in this equation. Your trying to find the number of years.

Answer 33

or i +3 to the 40 and the answer would be divided by 1.5

Answer 34

you need to get rid of the 3, by eliminating it on both sides.

Answer 35

oh ok and 37=1.5 is the answer

Answer 36

not quite you need to isolate the y. It's not isolated yet, 1.5 is still attached.

Answer 37

divide both sides by 1.5 to isolate y

Answer 38

oh ok thank you

Answer 39

what did you get as your answer?

Answer 40

y=24.6

Answer 41

@bloofoffiction

Answer 42

yes, but it depends on if you have to round. technically it should be 24.7

Answer 43

ok

Answer 44

thank you so much @bloofoffiction

Answer 45

no problem! anything else?

Answer 46

no not for now

Answer 47

Quick question, what math level is this?

Answer 48

theres honors,intro to algebra,and advanced

Answer 49

last year i was in advanced but now this year im in intro to algebra @bloofoffiction

Answer 50

Ok, just wondering, because I covered this not to long ago. I;m in algebra as well

Answer 51

oh cool.