Word Problem

[hharris32]

Can anyone help me solve this:
The length of a rectangle is fixed at 23cm. What widths will make the perimeter greater 100cm?
I am so confused.
Also I have this word problem:
In 1994, the life expectancy of males in a certain country was 61.9 years. In 1999, it was 65.3 years.
Let E represent the life expectancy in years (E) and let (t) represent the number of years since 1994?
E(t)= ?t+?
Anyone's feedback or assistance would be greatly appreciated.
Hannah

 

[mmm4444bot]

The length of a rectangle is fixed at 23cm. What widths will make the perimeter greater 100cm?
I am so confused.

You need to solve:

perimeter > 100

2*L + 2*W > 100

2(23) + 2W > 100

Can you solve this inequality for W ?

Also I have this word problem:
In 1994, the life expectancy of males in a certain country was 61.9 years. In 1999, it was 65.3 years.
Let E represent the life expectancy in years (E) and let (t) represent the number of years since 1994?
E(t)= ?t+?

(It looks, to me, like somebody forgot to state an assumption: assume that life expectancy for these males is linear.)

Have you worked with linear equations?

y = mx + b

E(t) = mt + b

You have the coordinates for two points on the line.

t = 0 in 1994, and five years later t = 5 in 1999.

(0, 61.9)

(5, 65.3)

Can you use these two ordered pairs to find the slope m?

Can you find the intercept b?

 

[stapel]

Are these questions from the University of Phoenix online final, or the Axia online final?