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Numeric_Fractions/645540: Hi, i cannot get the correct answer to this by my own:
9-6 3/5
the book's answer key state that the correct answer is 2 2/5 but i get 3 2/5. Please help
1 solutions

Answer 405519 by Alan3354(30983) About Me  on 2012-09-04 15:07:52 (Show Source):
You can put this solution on YOUR website!
9-6 3/5
------------
9 = 8 5/5
---
8 5/5
6 3/5
------ Subtract
2 2/5
===========
Or,
9 - 6.6 = 2.4
= 2 2/5


Average/645542: i am looking to get to problems for my Algebraic connections class and i am a sub so i need questions and answers so i can give it to them ....
Like one step x+3=10 and show your work...also i need 2 step like 3x+4=16 and show your work... Can you help me out the more i have the better i will like it so my class will stay busy and in their seats...
Thanks so much
Durinda Willard
1 solutions

Answer 405516 by Alan3354(30983) About Me  on 2012-09-04 15:03:36 (Show Source):
You can put this solution on YOUR website!
I would check the solved problems, there are 1000s of them.


logarithm/645447: could you please help me find the value of :
9 3log4 + 16 1/2log6
note: it's half-log-six
1 solutions

Answer 405477 by Alan3354(30983) About Me  on 2012-09-04 11:52:48 (Show Source):
You can put this solution on YOUR website!
could you please help me find the value of :
9 3log4 + 16 1/2log6
note: it's half-log-six
================
??? Is it 9*3log(4)? = 27log(4)?


Divisibility_and_Prime_Numbers/645461: Read and answer each question.
1. What is the product of 5 and the sum of all the prime numbers that are less than 10?
2.What is the difference between the greatest prime number that is less than 60 and the least prime number?
3. Add all the prime numbers between 60 and 70. what is the sum?
4.What number represents the prime factorization. 2.2.2.7.3.3.3.5?
5.What is the prime factorization of the sum of all prime numbers between 40 and 50?

1 solutions

Answer 405475 by Alan3354(30983) About Me  on 2012-09-04 11:51:23 (Show Source):
You can put this solution on YOUR website!
duplicate
=============
If you email via the Thank You note I'll help you if you need it.
These are problems you just "grind out," tho, and I don't need the practice.


Quadratic_Equations/645451: sketch the graphs of hte line and the parabola on a single set of axes. find the coordinates of any points of interstctions by solving algebraically.
2x+y=10, y=9-x^2
1 solutions

Answer 405473 by Alan3354(30983) About Me  on 2012-09-04 11:48:57 (Show Source):
You can put this solution on YOUR website!
sketch the graphs of hte line and the parabola on a single set of axes. find the coordinates of any points of interstctions by solving algebraically.
------------
dl the FREE graph software at
http://www.padowan.dk
==================
2x+y=10, y=9-x^2
---
2x + (9-x^2) = 10
x^2 - 2x + 1 = 0
x = 1, x = 1
-----------
--> (1,8) the only intersection point.
The line is tangent to the parabola


Travel_Word_Problems/645452: If a car was to travel a distance of 180km at a speed of 60km/h, how long would this take? I know the formula is Time = Distance divided by Speed, but i did this and i got 3 minutes...surely this can't be right?...
1 solutions

Answer 405469 by Alan3354(30983) About Me  on 2012-09-04 11:20:26 (Show Source):
You can put this solution on YOUR website!
If a car was to travel a distance of 180km at a speed of 60km/h, how long would this take? I know the formula is Time = Distance divided by Speed, but i did this and i got 3 minutes...surely this can't be right?...
-------------
The speed is km/hr, not km/minute
--> 3 hours.
==================
t = d/r = 180 km/60 km/hr
t = 3/(1/hr) = 3 hrs
Include the units in your calculations, it will improve the chances of getting it right.


Inequalities/645419: 54.000/12=4500
8%=0.08
0.08*4500=360
360-100=260
How do I write this as an inequality? Car payments. As a rule of thumb, debt payments (other than mortgages) should be less than 8% of a consumer’s monthly gross income. Oliver makes $54,000 a year and has a $100 student-loan payment every month. What size car payment can he afford?
Divide 54,000 by 12 which will =4,500 Take 8%turn it into a decimal 0.08and multiply 4500=$360 then subtract the student loan $360-$100=$260
Oliver can afford a $260 car payment.
1 solutions

Answer 405467 by Alan3354(30983) About Me  on 2012-09-04 11:17:17 (Show Source):
You can put this solution on YOUR website!
54.000/12=4500
8%=0.08
0.08*4500=360
360-100=260
How do I write this as an inequality? Car payments. As a rule of thumb, debt payments (other than mortgages) should be less than 8% of a consumer’s monthly gross income. Oliver makes $54,000 a year and has a $100 student-loan payment every month. What size car payment can he afford?
Divide 54,000 by 12 which will =4,500 Take 8%turn it into a decimal 0.08and multiply 4500=$360 then subtract the student loan $360-$100=$260
Oliver can afford a $260 car payment.
-----------
You have it right, unless Oliver has other debts he didn't disclose.


Quadratic_Equations/645410: You're getting paid, right? :I
1 solutions

Answer 405461 by Alan3354(30983) About Me  on 2012-09-04 10:40:40 (Show Source):
You can put this solution on YOUR website!
You're getting paid, right? :I
-------------
Not so far, but there's always hope.


Triangles/645439: if one acute angle in a right angled triangle is double the other then prove that the hypotenuse is double the shortest side
1 solutions

Answer 405460 by Alan3354(30983) About Me  on 2012-09-04 10:35:12 (Show Source):
You can put this solution on YOUR website!
if one acute angle in a right angled triangle is double the other then prove that the hypotenuse is double the shortest side
-------------
It's the 30-60-90 triangle.
sin(30) = 0.5 --> a/c = 0.5
c = 2a


Mixture_Word_Problems/645436: how many gallons of gasoline do cars use each year in the united states?

1 solutions

Answer 405458 by Alan3354(30983) About Me  on 2012-09-04 10:31:18 (Show Source):
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how many gallons of gasoline do cars use each year in the united states?
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Many gallons.
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That's not a problem anyone can calculate, that's something you have to look up somewhere.


Travel_Word_Problems/645403: I have 900 pieces to inpsect, it take 15 minutes to inspect, how long would this take?

1 solutions

Answer 405453 by Alan3354(30983) About Me  on 2012-09-04 10:11:59 (Show Source):
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I have 900 pieces to inpsect, it take 15 minutes to inspect, how long would this take?
===============
15 minutes.
That's what you said.


Polynomials-and-rational-expressions/645440: Don't remember how to do these word problems. But the height is also giving me a trouble.
If a stone is tossed from the top of a 350 meter building, the height of the stone as a function of time is given by h(t) = -9.8t2 – 10t + 350, where t is in seconds, and height is in meters. After how many seconds will the stone hit the ground? Round to the nearest hundredth’s place; include units in your answer.
1 solutions

Answer 405452 by Alan3354(30983) About Me  on 2012-09-04 10:09:51 (Show Source):
You can put this solution on YOUR website!
If a stone is tossed from the top of a 350 meter building, the height of the stone as a function of time is given by h(t) = -9.8t2 – 10t + 350, where t is in seconds, and height is in meters. After how many seconds will the stone hit the ground? Round to the nearest hundredth’s place; include units in your answer.
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h(t) = -9.8t2 – 10t + 350
At impact, h(t) = 0
-9.8t2 – 10t + 350 = 0
Solve for t, ignore the negative solution.
==========================================
h(t) = -9.8t2 – 10t + 350 might be true somewhere, but on Earth it's
h(t) = -4.9t^2 – 10t + 350, not -9.8


Travel_Word_Problems/645418: A train covers a distance of 51km in 45minutes.how long will it take to run 221km?
1 solutions

Answer 405451 by Alan3354(30983) About Me  on 2012-09-04 10:07:16 (Show Source):
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A train covers a distance of 51km in 45minutes.how long will it take to run 221km?
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51/45 = 221/t, t in minutes


Exponents-negative-and-fractional/645428: How do I solve -3/8y = -6?
1 solutions

Answer 405450 by Alan3354(30983) About Me  on 2012-09-04 10:03:30 (Show Source):
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How do I solve -3/8y = -6?
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If it's (-3/8)y = -6
Multiply by 8
Divide by 3
Multiply by -1
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Do those 3 things in any order.


Circles/645433: given C(6,1) x-intercept is 2 find the equation of a circle
1 solutions

Answer 405448 by Alan3354(30983) About Me  on 2012-09-04 09:59:26 (Show Source):
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given C(6,1) x-intercept is 2 find the equation of a circle
===============
Find the distance from C to (2,0), that's the radius.
%28x-6%29%5E2+%2B+%28y-1%29%5E2+=+r%5E2 is the circle.


percentage/645435: 135% of 147,500
1 solutions

Answer 405447 by Alan3354(30983) About Me  on 2012-09-04 09:46:34 (Show Source):
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135% of 147,500
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= 1.35*147500


Polynomials-and-rational-expressions/645268: can someone show me how to go about graphing this parabola y=3/4x^2. i do know that is will open upward.
1 solutions

Answer 405413 by Alan3354(30983) About Me  on 2012-09-03 21:56:12 (Show Source):
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can someone show me how to go about graphing this parabola y=3/4x^2
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Same as most.
Pick values for x and find y.
Plot the points.
Draw a curve thru them.
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y+=+3x%5E2%2F4
x = 0, y = 0 --> (0,0)
x = 1, y = 0.75 --> (1,0.75)
Notice that +x and -x give the same y.
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Use Excel to make a table of points.
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Even better,
dl the FREE graph software at
http://www.padowan.dk
Click Insert, enter 3x^2/4


Square-cubic-other-roots/645227: what is w if the square root of 79 is divided by 3?
1 solutions

Answer 405401 by Alan3354(30983) About Me  on 2012-09-03 21:17:39 (Show Source):
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what is w if the square root of 79 is divided by 3?
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sqrt%2879%29%2F3
=~ 2.96273
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I don't know how that's related to w


Travel_Word_Problems/645229: Micheal drove to a friends house at a rate of 40 mi/h. He returned by the same route at a rate of 45 mi/h. The driving time for the round trip was 4 h. What is the distance Michael traveled.
1 solutions

Answer 405399 by Alan3354(30983) About Me  on 2012-09-03 21:13:10 (Show Source):
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Micheal drove to a friends house at a rate of 40 mi/h. He returned by the same route at a rate of 45 mi/h. The driving time for the round trip was 4 h. What is the distance Michael traveled.
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Avg speed for the round trip = 2*40*45/(40+45) = 3600/85 mi/hr
Avg speed = 720/17 mi/hr
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d = r*t
d = (720/17)*4 = 2880/17 miles round trip


Travel_Word_Problems/645232: For the first 5 miles of a 10-mile race, Joshua's rate was 10 mph. for the last 5 miles, his rte slowed to 8 mph. How long it take for Joshua to complete the race?
1 solutions

Answer 405398 by Alan3354(30983) About Me  on 2012-09-03 21:10:04 (Show Source):
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For the first 5 miles of a 10-mile race, Joshua's rate was 10 mph. for the last 5 miles, his rte slowed to 8 mph. How long it take for Joshua to complete the race?
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His avg speed for the 10 miles = 2*10*8/(10+8) = 80/9 mi/hr
d = r*t
t = d/r = 10/(80/9) = 9/8
t = 1.125 hours


Percentage-and-ratio-word-problems/645205: what is 2 3/4 as a percent

1 solutions

Answer 405395 by Alan3354(30983) About Me  on 2012-09-03 21:04:23 (Show Source):
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what is 2 3/4 as a percent
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275%


Linear-systems/645170: Can you help me solve this problem, please?
X-y =1
Y= 5
1 solutions

Answer 405391 by Alan3354(30983) About Me  on 2012-09-03 20:05:02 (Show Source):
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X-y =1
Y= 5
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y = 5
---
x - 5 = 1
x = 6


Trigonometry-basics/645035: A tire is rotating 900times per min. Through how many degrees does a point on the edge of a tire move in 1/3 seconds?

1 solutions

Answer 405390 by Alan3354(30983) About Me  on 2012-09-03 20:02:19 (Show Source):
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A tire is rotating 900times per min. Through how many degrees does a point on the edge of a tire move in 1/3 seconds?
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900 rev/min = 15 rev/sec
--> 5 rev in 1/3 second
= 1800 degrees
=================
For all points on the tire (except the center), not just a point on the edge.


Exponents/645140: Simplify the expression. Write your answer without using negative exponents.
−1,331^ 2/3
1 solutions

Answer 405389 by Alan3354(30983) About Me  on 2012-09-03 19:55:44 (Show Source):


Functions/645076: what is the name of the function?
f(x)=10x
1 solutions

Answer 405355 by Alan3354(30983) About Me  on 2012-09-03 18:18:44 (Show Source):


Polynomials-and-rational-expressions/645094: Please show me the steps in solving the following equation:
3x^2 x 6X +5
1 solutions

Answer 405354 by Alan3354(30983) About Me  on 2012-09-03 18:18:06 (Show Source):
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Please show me the steps in solving the following equation:
3x^2 x 6X +5
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No equal sign --> not an equation.


Parallelograms/645045: can you please help me solve this problem
c(3,5) and d(7,5)

1 solutions

Answer 405353 by Alan3354(30983) About Me  on 2012-09-03 18:17:10 (Show Source):
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can you please help me solve this problem
c(3,5) and d(7,5)
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What is the problem?
2 points is not a problem.


Problems-with-consecutive-odd-even-integers/644996: Problem: "Using the numbers 9, 8, 7, 6, 5, and 4, once each. Find the smallest (positive) difference."
Through the guess and check method, I've tried every single combination possible. I even made a list of all the possible combinations and haven't found a solution. The answer to the problem (according to the textbook) is 47. The smallest I've found is 53 using 748-695.
Thanks!
1 solutions

Answer 405333 by Alan3354(30983) About Me  on 2012-09-03 15:35:58 (Show Source):
You can put this solution on YOUR website!
Problem: "Using the numbers 9, 8, 7, 6, 5, and 4, once each. Find the smallest (positive) difference."
Through the guess and check method, I've tried every single combination possible. I even made a list of all the possible combinations and haven't found a solution. The answer to the problem (according to the textbook) is 47. The smallest I've found is 53 using 748-695.
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745 - 698 = 47


test/644908: Simplify the radical. Assume that the variable represents a positive real number
(a^3/729)^1/3
9/a
a^1/3 /9
a^3/9
a/9
Is the answer a^3/9 right? Thank you
1 solutions

Answer 405313 by Alan3354(30983) About Me  on 2012-09-03 13:07:41 (Show Source):
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(a^3/729)^1/3
729 = 9^3
--> a/9
============


logarithm/644839: How to calculate log and anti - log of a number
1 solutions

Answer 405278 by Alan3354(30983) About Me  on 2012-09-03 11:09:03 (Show Source):
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How to calculate log and anti - log of a number
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google logs or series.
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Most of us use a calculator, tho.


Radicals/644851: compute the value of |-6-6i|
1 solutions

Answer 405277 by Alan3354(30983) About Me  on 2012-09-03 11:07:55 (Show Source):
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compute the value of |-6-6i|
--------
= sqrt%286%5E2+%2B+6%5E2%29
= 6sqrt%282%29