Debbie Said:

Algebra Homework Help?

We Answered:

This is indeed a ratio problem:
Put person/shadow = tree/shadow.

1.2 / 2 = x / 75

Cross multiply, or solve the equation so that:
x = (1.2)(75)/2
x = 90/2
x = 45.

Therefore, the tree is 45 meters high.
I hope this helps.

Jared Said:

Algebra Homework!?

We Answered:

sure but i have to have some details

Ruby Said:

Help on Algebra homework?

We Answered:

Let x= amount of money invested at 6%
$20,000 -x = amount of money invested at 9%

.06(x) + .09($20,000 -x) = $1440
.06x + $1,800 - .09x = $1440
-.03x = -$360
x = $12,000 invested at 6%
$20000 - $12,000= $8,000 invested at 9%

To check your answer:
.06($12,000) + .09($8,000) = $1440
$720 + $720 = $1440
$1440 = $1440

Jane Said:

ALGEBRA HOMEWORK???!?!?!??!?!?!?

We Answered:

There's slope-intercept form. (y=mx+b) there's point-slope form(y-ysub1=m(x-xsub1) and then there's the other one which i forgot the name of but it's ax+by=c

Rodney Said:

algebra homework?

We Answered:

The independent variable is the rainfall (the cause).
The dependent variable is the height of water in the lake (the result).

The domain contains all the values possible for the independent variable. For rainfall, you may consider it to be [0, infinity), but for practical purposes such as graphing you may decide to limit the range.

The range contains all the values possible for the dependent variable. For the depth of water, it is [0, depth of the lake], though again, flooding may occur to a higher level.