my daughter needs your help ............. she has to make the equasion to the following question.
if the elm tree was 3m in height and reached a height of 4.2m in 6 years calculate the growth height per year?
we know the answer is 0.2m but we don't know how to express this as an equasion i.e x=
any help would be appreciated
2006-08-23 08:04:03 · 16 answers · asked by fraser 2 in Education & Reference ➔ Homework Help
apparently she has just said that the equasion must be expressed in the following way ....... this one she could answer
if you bought 3 coffee & 4 Teas and coffee costs 10pence more than tea. if the bill was £3.10 what is the price of a cup of tea ??
she set out her answer as follows
tea = 4x
coffee = 3x +30
7x + 30 =310
7x = 280(divided by 7)
x= 40
tea = 40p
coffee = 50p
can you help by applying the same logic to the original question
2006-08-23 08:25:01 · update #1
it could be
x = 0.2 x 6
ps think its graet that your helping mine parents dont
2006-08-23 08:06:36 · answer #1 · answered by Anonymous · 1⤊ 0⤋
the original height is 3m and the final height is 4.2m so it grew 1.2m in 6 years; 1.2 divided by 6 is 0.2
x = (original height - final height) divided by the number of years
or
x = (4.2 - 3) / 6
2006-08-23 08:07:38 · answer #2 · answered by Eddie 1 · 1⤊ 0⤋
New height = 4.2 metres
Old height = 3.0 metres
Time = 6 years
Growth per year = x
Equation = new height minus old height divided by time
X = (4.2 - 3.0) divided by 6
X = 1.2 divided by 6
X = 0.2 metres per year
2006-08-23 08:27:54 · answer #3 · answered by Anonymous · 1⤊ 0⤋
Growth per year (G) = increase in height (h)/number of years (t)
ie G=h/t
in this case G = (4.2 - 3)/6 or 0.2m/year
2006-08-23 08:21:41 · answer #4 · answered by migelito 5 · 1⤊ 0⤋
Let x represent the growth height of the tree per year, then:
4.2=3+6x
Isolate for x, and solve.
2006-08-23 08:07:11 · answer #5 · answered by Taha T 2 · 1⤊ 0⤋
4.2 = 3 + 6(x)
4.2-3=6(x)
1.2=6(x)
x=1.2/6
x=0.2
where x is the growth height per year.
You have an arithmetic series here. That means each year, you would add another height, x, to your tree.
2006-08-23 08:05:37 · answer #6 · answered by starr 3 · 2⤊ 0⤋
Try this:
x = tree growth in meters
6x = total growth in 6 years
4.2 - 3 = 6x
4.2 - 3 / 6 = x
1.2 / 6 = x
0.2 = x
2006-08-23 09:24:34 · answer #7 · answered by sappergary 2 · 1⤊ 0⤋
x = (4.2 - 3) / 6
It should be (4.2 - 3) underlined, with the 6 under the line but no matter how I try to format it, the underline does not remain in the correct place when I preview the answer.
P.S. the word is equation
2006-08-23 08:19:03 · answer #8 · answered by Anonymous · 1⤊ 0⤋
X=the final height-starting height/number of years of growth. Call it : x = (f-N)/Y
2006-08-23 08:09:30 · answer #9 · answered by Anonymous · 1⤊ 0⤋
groweth for 6 years = 4.2-3
therefore groweth rate for one year = (4.2-3)/6
u can use the equation (4.2-3)/6 =X
(Answers posted by our frinds involving .2 is wrong. u cannot know the answer while creating the equation)
2006-08-23 08:15:03 · answer #10 · answered by Nalin S 2 · 1⤊ 0⤋
initial height =H=3
final height=F=4.2
time for growth = T =6
rate=(F-H)/T=(4.2-3)/6=1.2/6=0.2
2006-08-23 08:11:58 · answer #11 · answered by doctor ross 2 · 1⤊ 0⤋