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Surface-area/284644: Hi, my question is that what is the surface area of a box five feet long, three feet wide, and seven feet high?
1 solutions
Answer 206495 by richwmiller(9132)   on 2010-03-23 21:26:01 (Show Source):
You can put this solution on YOUR website!how would you find any surface area? How about the surface area of rectangle?
A box has 6 surfaces.
top bottom are the same
the ends are the same
and the sides are the same.
so that is three different surfaces twice each
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Linear-equations/284647: Write the variation, and find the quantity indicated. r varies directly as s. Find r when s = 13 and k = 14. The variation is ______ (Type k for the variation constant. Do not substitute in values)
1 solutions
Answer 206492 by richwmiller(9132) on 2010-03-23 21:20:39 (Show Source):
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Graphs/284652: Determine which ordered pairs are part of the solution set for each inequality.
y<3-2x,{(0,4),(-1,3),(6,-8),(-4,5)}
1 solutions
Answer 206490 by richwmiller(9132) on 2010-03-23 21:17:22 (Show Source):
You can put this solution on YOUR website!It is matter of testing them
better your time than mine.
just plug in the given x's and y's and see if the results fit the inequality
if they do then they are part of the solution set.
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Numbers_Word_Problems/284631: m-2 / 3m + 9 * m^2 + 6m + 9 / 2m^2 - 8 Please show all steps in solving this problem.
1 solutions
Answer 206486 by richwmiller(9132) on 2010-03-23 21:12:37 (Show Source):
You can put this solution on YOUR website!This problem has nothing to do with consecutive numbers little to do with numbers at all.
It is not a word problem and it is written poorly. Rewrite with many parentheses. It could have a million different meanings
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Triangles/284564: One angle of a triangle is a right angle. The third angle is three times the smallest angle. what are their measures?
I have tried setting up an equation:
180= 90 + 3x + x
--------
-90
90= 3x + x
-------
3
30= x
but it didn't work because if this answer is substituted back in it doesn't work. I'm not sure if i just solved the equation wrong or if it is the wrong equation all together.
If you can help me it will be greatly appreshiated:)
1 solutions
Answer 206480 by richwmiller(9132) on 2010-03-23 21:00:51 (Show Source):
You can put this solution on YOUR website!You were good up to
90=3x+x
you divided the 90 by 3 and 3x by 3 but you forgot the other x
anyways it was the wrong move
90=3x+x
add 3x+x to get 4x
90=4x
now divide by 4
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Linear_Algebra/284604: you can rent a car a day from company A for $49 plus $o.10 a mile or from company B for$29 plus$o.18 a mile. Formulate a systems of equation that can be used to help make a decision about which country to rent from. let x = number of miles and y= total cost of car.
1 solutions
Answer 206478 by richwmiller(9132) on 2010-03-23 20:48:35 (Show Source):
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Probability-and-statistics/284627: Suppose that an urn contains 3 green marbles, 11 black marbles, and 6 yellow marbles. If one marble is selected, determine the probability that it is black.
Here is my solution:
3 + 11 + 6 = 20
black marbles = 11
answer: 11/20.
1 solutions
Answer 206477 by richwmiller(9132) on 2010-03-23 20:47:06 (Show Source):
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Graphs/284586: Graph equation by determining the missing values needed to plot the ordered pairs y+x=4; (3, ), (4, ), (1, )
1 solutions
Answer 206475 by richwmiller(9132) on 2010-03-23 20:43:29 (Show Source):
You can put this solution on YOUR website!plug 3 in for x and find y
plug 4 in for x and find y
plug 1 in for x and find y
you actually only need two points to find your line so the third point is to check that you did all three correctly.
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Graphs/284625: Please Help Me;
The Directions are to write an equation for the linear function f with the given values.
f(0)= -1, F(3)= -10
Please Help Me, Thank You So Much,
♥
1 solutions
Answer 206472 by richwmiller(9132) on 2010-03-23 20:38:31 (Show Source):
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Volume/284596: Find the height of a cylinder with a radius of 8.4 inches and a volume of 3546.7in <-(that number has a little three above it) Round to the nearest tenth
1 solutions
Answer 206469 by richwmiller(9132) on 2010-03-23 20:30:04 (Show Source):
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Rate-of-work-word-problems/284590: John can type 2/3 of a manuscript in 12 hours. If Laura and John work together, they can type the entire manuscript in 2 hours. If Laura worked alone, how long would it take her to type the manuscript?
1 solutions
Answer 206467 by richwmiller(9132) on 2010-03-23 20:18:08 (Show Source):
You can put this solution on YOUR website!John is obviously not much of a typist and should just hire Laura to do it.
John will take 18 hours to type the thing by himself.
2/18+2/L=1
2L+36=18L
36=16L
9=4L
9/4=L
2 1/4=L
2.25=L
1/9+2/2.25=1
1/9+8/9=1
Laura does 8/9 of the work and John does 1/9 and most of his is probably errors.
Laura can do it alone in 2 hours 15 minutes.
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Linear_Equations_And_Systems_Word_Problems/284543:
Solve the problem.
After two years on the job, an engineer's salary was $45,000. After seven years on the job, her salary was $60,000. Let y represent her salary after x years on the job. Assuming that the change in her salary over time can be approximated by a straight line, give an equation for this line in the form y = mx + b.
1 solutions
Answer 206441 by richwmiller(9132) on 2010-03-23 18:24:06 (Show Source):
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Percentage-and-ratio-word-problems/284538: Hello! I would really like if you could help me with this problem. We have to turn 34/42 into a decimal then into a percent. I tried to multiply 42(the denominator) till i got 100, but 42 doesn't go into 100 so i tried multiplying till i got a number that can go into 200 300 400... but 42 doesn't go into those numbers either. Can you help? thanks for reading this -S
1 solutions
Answer 206439 by richwmiller(9132) on 2010-03-23 18:18:30 (Show Source):
You can put this solution on YOUR website!to get the decimal you divide 42 into 34 and no it doesn't go evenly
you could reduce 34/42=17/21 to make it a little easier (but not much) to divide 21 into 17
then take that decimal and multiply it by 100 to get percent.
it should be at least .xxx places
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Linear-equations/284532: this is a question in my 8th grade Pre algebra class that i don't understand: If an athlete runs 1 mile in 6 minutes, 2 miles in 12 minutes, and 3 miles in 18 minutes. Does the athlete run at a linear rate? Explain your reasoning.
1 solutions
Answer 206437 by richwmiller(9132) on 2010-03-23 18:13:14 (Show Source):
You can put this solution on YOUR website!first you have to understand what linear rate means.
Linear means it make a line.
If you plot (1,6) (2,12) (3,18) will it make a line.
Try it.
the formula for a line is y=mx+b
in this case b=0
and m =6
y=6x
try them
6=6*1
12=6*2
18=6*3
so yes it is linear
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Money_Word_Problems/284400: The revenue achieved by selling x graphing calculators is figured to be x(32-0.2x) dollars. The cost of each calculator is $16. How many graphing calculators must be sold to make a profit (revenue - cost) of at least $307.20?
1 solutions
Answer 206385 by richwmiller(9132) on 2010-03-23 12:59:09 (Show Source):
You can put this solution on YOUR website!revenue-cost=profit
x(32-.2x)-16x=307.20
x=32 and 48
the max will be at 40
There is obviously something wrong with the formula if the same profit is made at 32 and 48 pieces
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Functions/284399: if f(x)=X^2 and g(x)=3X-4, find (fog). The solution is shown as this 9x^2-24x+16. I just can't figure out where the 24x comes from??? I understand where everything else comes from except the 24x! lol.
1 solutions
Answer 206383 by richwmiller(9132) on 2010-03-23 12:50:17 (Show Source):
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Rectangles/284331: The area of a square exceeds the area of a rectangle by 4 square inches. The width of a rectangle is 5 inches and the length is 4 inches longer than the side of the square. Find the side of the square.
1 solutions
Answer 206381 by richwmiller(9132) on 2010-03-23 12:44:44 (Show Source):
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