Geometry_Word_Problems/537035: a farmer has 500 feet of fence with which to enclose a rectangular field. a striaght river bank will be used as a part of fencing on one side of the field.prove that area of the field is greatest when the rectangle is square?
1 solutions

Answer 352707 by Alan3354(30993) on 2011-11-27 08:56:09 (Show Source):

You can put this solution on YOUR website!
It isn't.
Using 500 ft for 3 sides --> (500/3)^2 sq ft =~ 27,778 sq ft.
Making it 150 by 200 --> 30,000 sq ft.
-----------
So it's disproven.

Exponents/537029: what is the espression using exponents 7 to the 9th power
1 solutions

Answer 352704 by Alan3354(30993) on 2011-11-27 07:23:33 (Show Source):

You can put this solution on YOUR website!
7%5E9

Square-cubic-other-roots/537034: Find two consecutive whole numbers that square root 8 lies between
1 solutions

Answer 352703 by Alan3354(30993) on 2011-11-27 07:22:52 (Show Source):

You can put this solution on YOUR website!
2 & 3

Rectangles/537039: write all possible competitions of length and breadth for a rectangle with area 36 sq cm. also find perimeter in each case
1 solutions

Answer 352701 by Alan3354(30993) on 2011-11-27 07:19:28 (Show Source):

You can put this solution on YOUR website!
write all possible competitions of length and breadth for a rectangle with area 36 sq cm. also find perimeter in each case
--------------
Maybe you mean combinations.
-------
Area = L*W = 36
L = 36/W
--------
Perimeter = 2L + 2W
P = (72/W) + 2W

test/536981: How can u tell if the lunes is linar
1 solutions

Answer 352674 by Alan3354(30993) on 2011-11-26 22:30:45 (Show Source):

You can put this solution on YOUR website!
I can't.

Linear_Algebra/536944: How does the steepness of the line change the apperance of the graph when the scale is changed on both axes on a parabola?
1 solutions

Answer 352673 by Alan3354(30993) on 2011-11-26 22:18:51 (Show Source):

You can put this solution on YOUR website!
The steepness of what line?

Trigonometry-basics/536941: describe the difference between solving trigonometric identities and solving trigonometric equations?
1 solutions

Answer 352671 by Alan3354(30993) on 2011-11-26 22:10:01 (Show Source):

You can put this solution on YOUR website!
describe the difference between solving trigonometric identities and solving trigonometric equations?
------------------
Identities are not solved. Equations are solved.
An identity is a relationship that is true for all angles.
-----------
Equations are solved to find for what angle(s) they are true.

Travel_Word_Problems/536973: If you are doing 72 mph in a car, how quickly could you go to 35 mph?

1 solutions

Answer 352670 by Alan3354(30993) on 2011-11-26 22:05:39 (Show Source):

You can put this solution on YOUR website!
What do you mean?

Linear-equations/536948: A motorboat traveling with the current went 72 miles in 4 hours. Going against the current, it tool 6 hours to travel the same distance. Find the rate of the boat in calm water and the rate of the current. I came up with 15 mph for the rate of the boat and 3 mph for the rate of the current. Can someone tell me if these are correct?
1 solutions

Answer 352662 by Alan3354(30993) on 2011-11-26 21:05:47 (Show Source):

You can put this solution on YOUR website!
That's correct.

Problems-with-consecutive-odd-even-integers/536816: the product of two consecutive integers is 228 finmd the integers
1 solutions

Answer 352605 by Alan3354(30993) on 2011-11-26 16:19:27 (Show Source):

You can put this solution on YOUR website!
14*15 = 210
15*16 = 240
--> not possible

Numbers_Word_Problems/536765: The difference between two numbers is 19. Half the larger number plus twice the smaller number is 12. What are the numbers?

This is the equation I came up with but I can't make it work.
x-y=19
1/2x+2y=12
1 solutions

Answer 352567 by Alan3354(30993) on 2011-11-26 12:19:09 (Show Source):

You can put this solution on YOUR website!
The difference between two numbers is 19. Half the larger number plus twice the smaller number is 12. What are the numbers?

This is the equation I came up with but I can't make it work.
x-y=19
1/2x+2y=12 x2 --> x + 4y = 24
----------
x - y = 19
x +4y = 24
------------ Subtract
-5y = -5
y = 1
x = 20

Miscellaneous_Word_Problems/536739: Here’s my aggravation. I am taking a Math class online and we’re working on “Percent Word Problems.” Only thing is I am not sure when to divide or to multiply to find the answer. Is there a hint as to when to multiply or divide in these word problems. Help! I am stressed! (see below for example)
College graduation. To obtain his bachelor’s degree in nursing, Cody must complete 125 credit hours of instruction. If he has completed 60% of his requirement, how many credits did Cody complete?

1 solutions

Answer 352563 by Alan3354(30993) on 2011-11-26 10:39:19 (Show Source):

You can put this solution on YOUR website!
College graduation. To obtain his bachelor’s degree in nursing, Cody must complete 125 credit hours of instruction. If he has completed 60% of his requirement, how many credits did Cody complete?
-------------------------
100% is the whole thing, whatever it is.
If it's less than 100%, the amount will be smaller.
---------
60% = 60 out of 100, per cent means per hundred.
60/100 - 0.6
----------
125*0.6 = 75 credits

Equations/535101: I take any two numbers which I call a and b (lets say 2 and 3). These are my first 2 numbers. I then add them together to give my 3rd number (in this case 5), then to get my 4th number I add the second and third numbers (8). My 5th number is the sum of the third and forth numbers (5 + 8 = 13). My 6th is the sum of the forth and fifth etc until I have 10 numbers (if I start with 2 and 3 they would be 2, 3, 5, 8, 13, 21, 34, 55, 89, 144) Add these 10 numbers together.I can find the answer in my head before you can using a calculator using algebra. Please help me work out this question i have to find out how to use algebra to find the answer.Please help. thank you.
1 solutions

Answer 352555 by Alan3354(30993) on 2011-11-26 10:02:52 (Show Source):

You can put this solution on YOUR website!
Look up the Fibonacci Series.

Polynomials-and-rational-expressions/536703: Solve with a POSTIVE exponent answer.
(-1000)^(-2/3) I hope that this makes sense on your end. the problem has the -1000 inside of parenethesis with a -2/3 as the exponent
1 solutions

Answer 352554 by Alan3354(30993) on 2011-11-26 10:00:10 (Show Source):

You can put this solution on YOUR website!
%28-1000%29%5E%28-2%2F3%29

= 1/100

expressions/536727: how do you work this problem (T4)-2
1 solutions

Answer 352553 by Alan3354(30993) on 2011-11-26 09:58:11 (Show Source):

You can put this solution on YOUR website!
What do you mean by "work?"

Complex_Numbers/536729: (c+di)(C-di) Multiplication techniqu
e Foil
1 solutions

Answer 352552 by Alan3354(30993) on 2011-11-26 09:57:23 (Show Source):

You can put this solution on YOUR website!
(c+di)(C-di)
------------
It's the sum and difference
= c%5E2+-+d%5E2i%5E2

See tutors' answers!

Recent problems solved by 'Alan3354'