- enrico
- dondilaboy
- francisrwd
- priscillax
- daisyrql
Find a polynomial function or equation that represents the perimeter of a rectangle
Submitted by francisrwd on Fri, 05/17/2013 - 17:32
Find a polynomial function or equation that represents the perimeter of a rectangle that has a length of 2x - 3 and a width of x + 2.
Duration:
4 days 21 hours
When a plane flies with the wind it can travel 4200 miles in 6 hours.
Submitted by francisrwd on Wed, 05/01/2013 - 12:50When a plane flies with the wind it can travel 4200 miles in 6 hours. When the plane flies in the opposite direction, or against the wind, it takes 7 hours.
Find the speed or rate of the plane and the speed or rate of the wind.
Duration:
expired
Suppose that in 2003 ,certain groups contributed $273 million to federal candidates
Submitted by antonietta on Mon, 04/22/2013 - 10:29Suppose that in 2003, certain groups contributed USD273 million to federal candidates. In 2008, the figure rose to USD386.4 million. Assume that A(t) represent the amount of contributions, in millions, and t the number of years since 2000.
Find a liner function that models the data.
Duration:
expired
The sum of three numbers is 134. If the third number is 4 times the first
Submitted by priscillax on Mon, 04/01/2013 - 22:29
Here is a number problem.
If the sum of three numbers is 134, and the third number is 4 times the first, and the first number is 8 less than the second, what are the numbers?
Please explain the answer.
Number:
Assumptions:
x = the second number
x - 8 = the first number
4(x - 8) = third number
Given: Total is 134
first + second + third = 134
x - 8 + x + 4(x - 8) = 134
Simplifying gives:
x - 8 + x + 4x - 32 = 134
Adding like terms:
6x - 40 = 134
6x = 134 + 40
6x = 174
x = 29 => second number
First number => x - 8
29 - 8 = 21
Third number => 4(x - 8)
4(29 - 8) = 4(21) = 84
Therefore:
First number => 21
Second number => 29
Third number => 84
TOTAL = 21 + 29 + 84 = 134
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Adding polynomials
Submitted by francisrwd on Fri, 03/15/2013 - 00:00Add: \[ (-9 + 3n^6 + 3n^5) + (2n^6 + 5n^5 + 6) \]
Number:
=> (−9+3n6+3n5)+(2n6+5n5+6)
−9+6 +3n5 +5n5 + 2n6+3n6(grouping like terms)
( −9+6) +(3n5 +5n5 ) + (2n6+3n6)
(-3 ) + (8n5) + (5n6) (combining LIKE terms)
-3 + 8n5 + 5n6 (Answer)
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- 281 reads
