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Unit_Conversion_Word_Problems/503155: if an object accelerates for 3 seconds with a=6 m/s (meter/sec), how much does its velocity increase?
1 solutions

Answer 339149 by Alan3354(30993) About Me  on 2011-09-23 18:49:17 (Show Source):


Age_Word_Problems/503236: For question 261188 In 28 years, Mark will be 5 times as old as he is now. Find his present age. How did you come up with 4m. I would like to better understand the breakdown.

1 solutions

Answer 339148 by Alan3354(30993) About Me  on 2011-09-23 18:45:23 (Show Source):
You can put this solution on YOUR website!
For question 261188 In 28 years, Mark will be 5 times as old as he is now. Find his present age. How did you come up with 4m. I would like to better understand the breakdown.
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4 meters is an odd result.
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a = age now
a+28 = 5a
a = 7
---------
7 years, not meters


Mixture_Word_Problems/503232: how much water must be added to 300 L of a solution so that its concentration may change from 25% to 20%?
1 solutions

Answer 339147 by Alan3354(30993) About Me  on 2011-09-23 18:32:50 (Show Source):
You can put this solution on YOUR website!
Hint:
25% of 300 liters is 75 liters of product.
Add enough water that 75 liters is 20%.


Pythagorean-theorem/503234: What is the simple way of finding pythagoras theorem wihtout using a calculator
1 solutions

Answer 339146 by Alan3354(30993) About Me  on 2011-09-23 18:31:29 (Show Source):
You can put this solution on YOUR website!
??? Look in a book?
Ask someone?
-----------
How would a calculator help find the Pythagorean Theorem?


Square-cubic-other-roots/503231: root:2(3)*root:3(2)as a single radical expression
1 solutions

Answer 339145 by Alan3354(30993) About Me  on 2011-09-23 18:27:42 (Show Source):
You can put this solution on YOUR website!
root:2(3)*root:3(2)as a single radical expression
-------------
sqrt%283%29%2Aroot%283%2C2%29+=+root%286%2C27%29%2Aroot%286%2C4%29
= root%286%2C108%29


test/503220: Solve the system using substituion
4y+19=x
3y-x=-13
1 solutions

Answer 339144 by Alan3354(30993) About Me  on 2011-09-23 18:20:16 (Show Source):
You can put this solution on YOUR website!
4y+19=x
3y-x=-13
----------
3y-x=-13
3y - (4y+19) = -13
-y - 19 = -13
etc.


Travel_Word_Problems/503216: A coach calls a play from the sideline to a player. Assume the distance is 1.6 YARDS. If sound travels at 1080 FEET/second, how long will it take the sound to reach the player?
1 solutions

Answer 339135 by Alan3354(30993) About Me  on 2011-09-23 17:11:22 (Show Source):
You can put this solution on YOUR website!
1.6 yarde =4.8 feet
----------
d = r*t
t = d/r


Number-Line/503191: I am in Algebra 1A.(7th grade)....The problem is a face of a clock, and the question is; Draw a line segment across the clock so that the sums of the numbers on each side of the segment are the same?..Can you tell me why the sum on each half must be equal to 3x13????....HELP!!!! Thank you :-)
1 solutions

Answer 339130 by Alan3354(30993) About Me  on 2011-09-23 17:08:43 (Show Source):
You can put this solution on YOUR website!
Draw a line segment across the clock so that the sums of the numbers on each side of the segment are the same?..Can you tell me why the sum on each half must be equal to 3x13????
----------------------
If you draw a line the puts 4,5,6,7,8&9 on one side, and
1,2,3,10,11 & 12 on the other, both add to 39, which is 3*13.
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The line would go thru the 3:30 point, the center, and the 9:30 point.


Travel_Word_Problems/503190: Physical Science
How much work is done by a 60 newton force acting over a distance of 27 meters
1 solutions

Answer 339128 by Alan3354(30993) About Me  on 2011-09-23 17:05:05 (Show Source):


percentage/503198: The apartments in Brian's apartment house are numbered consecutively on each floor The sum of his number and his next door neighbor's number is 1419 What are the two number's?

1 solutions

Answer 339127 by Alan3354(30993) About Me  on 2011-09-23 17:04:40 (Show Source):
You can put this solution on YOUR website!
1419/2 = 709.5, the center or average
--> 709 & 710


Unit_Conversion_Word_Problems/503150: How much work is done by a 60 newton force acting over a distance of 27 meters?
1 solutions

Answer 339126 by Alan3354(30993) About Me  on 2011-09-23 17:03:23 (Show Source):
You can put this solution on YOUR website!
60*27 = 1620 newton-meters
= 1620 joules


Exponents/503193: hello i need help on integers i just dont get them at all like -2x=23 what are they talking about uhg...
1 solutions

Answer 339125 by Alan3354(30993) About Me  on 2011-09-23 17:01:09 (Show Source):
You can put this solution on YOUR website!
Integers are whole numbers, not fractions, not decimals.
5 is an integer
1137 is an integer
-------------
2.7 is not
6/11 is not
That's the whole story.


Unit_Conversion_Word_Problems/503145: combine units to make other units such as newtons of joules?
1 solutions

Answer 339123 by Alan3354(30993) About Me  on 2011-09-23 16:59:35 (Show Source):
You can put this solution on YOUR website!
Units can be "combined" by multiplication or division, but not otherwise.
eg, ft/sec * second --> feet
gm*cm/sec^2 = joules


Equations/503201: How do you solve two-step equations? I tried answering 8 - 5w= -37 and got w=5.8 but when I checked it, it was wrong.
1 solutions

Answer 339122 by Alan3354(30993) About Me  on 2011-09-23 16:56:36 (Show Source):
You can put this solution on YOUR website!
How do you solve two-step equations? I tried answering 8 - 5w= -37 and got w=5.8 but when I checked it, it was wrong.
--------------
8 - 5w= -37
Subtract 8
-5w = -45
5w = 45
w = 9


Equations/503207: How do you write this as an expression?
Tara scored 24 points in her first basketball game and n points in each of the next 4 games. Write an expression for Tara's average points scored.
Is it (24+5n)divided by 5?
1 solutions

Answer 339121 by Alan3354(30993) About Me  on 2011-09-23 16:55:03 (Show Source):
You can put this solution on YOUR website!
Tara scored 24 points in her first basketball game and n points in each of the next 4 games. Write an expression for Tara's average points scored.
Is it (24+5n)divided by 5?
------------------
You have the right idea, but it's
(24+4n)divided by 5?
Only 4 more games, for a total of 5.


Rectangles/503206: WHAT IS THE LENGH AND WIDTH OF 28.8 IF THE LENGH IS 2 TIMES THE WIDTH

1 solutions

Answer 339118 by Alan3354(30993) About Me  on 2011-09-23 16:43:00 (Show Source):
You can put this solution on YOUR website!
WHAT IS THE LENGH AND WIDTH OF 28.8
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That makes no sense, even assuming "LENGH" means length.


Linear-systems/503208: Solve the system, using elimination.
3x+2y=17
4x-2y=4
1 solutions

Answer 339117 by Alan3354(30993) About Me  on 2011-09-23 16:42:18 (Show Source):
You can put this solution on YOUR website!
3x+2y=17
4x-2y=4
----------- Add


Unit_Conversion_Word_Problems/503186: i asked the question wrong the first time Alan!!

If an object accelerates for 3 seconds with a=6 m/s^2 (meters/second^2), how much does the velocity increase?
1 solutions

Answer 339110 by Alan3354(30993) About Me  on 2011-09-23 15:46:04 (Show Source):
You can put this solution on YOUR website!
Your units weren't right, but that's the question I answered.
3 sec * 6 m/sec^2 = 18 m/sec increase.


Unit_Conversion_Word_Problems/503179: If an object accelerates for 3 seconds, with a=6 m/s (meters/seconds), how much does its velocity increase?
1 solutions

Answer 339103 by Alan3354(30993) About Me  on 2011-09-23 15:22:57 (Show Source):
You can put this solution on YOUR website!
3 sec * 6 m/sec/sec = 18 m/sec increase


Surface-area/503135: What is the area of this figure? Use 3.14 for pi.
8ft and 6ft
1 solutions

Answer 339101 by Alan3354(30993) About Me  on 2011-09-23 15:02:43 (Show Source):
You can put this solution on YOUR website!
No figure is shown.


Equations/503111: hi
I would like to know if I solved this equation correctly:
3x+y=25 where x-y=7 what is the value of y.
This is how I answered;
y=7-x
3x+ (7-x)=25
2x+7=25
2x+7=25
2x=18
x=9
y=7-9
y=-2
(x,y)= (9,-2)










1 solutions

Answer 339090 by Alan3354(30993) About Me  on 2011-09-23 13:09:46 (Show Source):
You can put this solution on YOUR website!
hi
I would like to know if I solved this equation correctly:
3x+y=25 where x-y=7 what is the value of y.
This is how I answered;
y=7-x
3x+ (7-x)=25
2x+7=25
2x+7=25
2x=18
x=9
y=7-9
y=-2
(x,y)= (9,-2)
---------------
You don't need to ask, just sub your answer into the equations.
----------
3x+y=25
3*9 - 2 = 25 That works.
-------------
x-y=7
9 - (-2) = 7
11 = 7 uhoh. It's not correct.


Travel_Word_Problems/503118: A car is traveling 65 mph how far is it going in 4 hours?
1 solutions

Answer 339088 by Alan3354(30993) About Me  on 2011-09-23 13:02:43 (Show Source):


Travel_Word_Problems/503074: What is the average speed in miles per hour of an object that travels 240 miles in 1 day?

1 solutions

Answer 339083 by Alan3354(30993) About Me  on 2011-09-23 11:16:30 (Show Source):
You can put this solution on YOUR website!
240 miles in 24 hours
-------
d = r*t
r = d/t


Linear-equations/503055: graph the linear equation x=8
1 solutions

Answer 339079 by Alan3354(30993) About Me  on 2011-09-23 10:11:45 (Show Source):
You can put this solution on YOUR website!
graph the linear equation x=8
-------------
It's a straight line, so you need 2 points.
x = 8 for all values of y, so pick 2 for y.
eg, y = 0 --> (8,0)
Pick any other y
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Plot the 2 points, draw a line thru them.


Angles/503052: the measure of an angle which is half of its supplementary

1 solutions

Answer 339078 by Alan3354(30993) About Me  on 2011-09-23 10:04:31 (Show Source):
You can put this solution on YOUR website!
the measure of an angle which is half of its supplement
------------------
A = (180 - A)/2
2A = 180 - A
A = 60 degs


Numbers_Word_Problems/503026: A number is decreased by 7 and twise this result is 34. What is the number?
1 solutions

Answer 339077 by Alan3354(30993) About Me  on 2011-09-23 10:00:42 (Show Source):
You can put this solution on YOUR website!
A number is decreased by 7 and twise this result is 34. What is the number?
------
n is the number
n - 7 is decreased by 7
2(n-7) = 34
Divide by 2
n-7 = 17
Add 7
n = 24


Numbers_Word_Problems/503000: The sum of two consecutive even integers is 122
1 solutions

Answer 339076 by Alan3354(30993) About Me  on 2011-09-23 09:56:57 (Show Source):
You can put this solution on YOUR website!
122/2 = 61, the center
--> 60 & 62


Geometry_Word_Problems/502991: a spherical tank has a capacity of 750 gallons. using the fact that 1 gallon is about 0.1337ft^3, find the radius of the tank( to the nearest hundreth of a foot)
1 solutions

Answer 339075 by Alan3354(30993) About Me  on 2011-09-23 09:54:39 (Show Source):
You can put this solution on YOUR website!
a spherical tank has a capacity of 750 gallons. using the fact that 1 gallon is about 0.1337ft^3, find the radius of the tank( to the nearest hundreth of a foot)
-------------
Vol = 750*0.1337 cf
Vol+=+4%2Api%2Ar%5E3%2F3


Travel_Word_Problems/503030: bob traveled 150 miles in 75 minutes. find his average speed during the trip in mph
1 solutions

Answer 339073 by Alan3354(30993) About Me  on 2011-09-23 09:51:53 (Show Source):
You can put this solution on YOUR website!
d = r*t
r = d/t


Travel_Word_Problems/502996: A CYCLIST TAKES 2 HOURS TO COVER A DISTANCE OF 24 KM.IF HE INCREASES HIS SPEED BY 4 KM/HR..HOW MUCH TIME WOULD HE TAKE TO COMPLETE THE SAME DISTANCE?
1 solutions

Answer 339072 by Alan3354(30993) About Me  on 2011-09-23 09:49:23 (Show Source):
You can put this solution on YOUR website!
d = r*t
t = d/r


Travel_Word_Problems/503022: a car covered a total distance of 105 km in 1.5 hours.find the average speed in km/ hrs
1 solutions

Answer 339071 by Alan3354(30993) About Me  on 2011-09-23 09:46:18 (Show Source):
You can put this solution on YOUR website!
d = r*t
r = d/t