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January 29, 2015

Homework Help: Math

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Recent Math Questions

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math help
5x+10y +15z-15x+10y-5z+5x-10y-5z / (5x+10y+15z)-(15x+10y-5z)+(5x-10y-5z) a. 1/3 b. 1 c. x+2y+z / x-2y+3z d. x-2y-z / x+2y-3z e. x-2y-z / x+2y+z my answer is none of above, is - 1/3, I didn't know I done it wrong or the question is not correct
Sunday, September 29, 2013 at 5:36pm

Math
Prove that (xt+yr)/yt is already in lowest terms, b and d have no common prime factor. Note that x/y and r/t are fractions in reduced terms.
Sunday, September 29, 2013 at 5:35pm

philosophy logic - math
Natural Deduction Proof 1. 1 ~Y ⇒ ~L 2 W v ~Y 3 W ⇒ ~B / ~B v ~L 2. 1 ~U • (G = ~T) 2 (~U v D) ⇒ (W • ~R) / W • ~U 3. 1 (M ⇒ P) ⇒ ~P 2 H ⇒ P 3 M ⇒ H / ~H 4. 1 ~Z 2 S 3 Zv(S ⇒ H) / H
Sunday, September 29, 2013 at 5:31pm

Math
state and prove the distributive property of rational numbers.
Sunday, September 29, 2013 at 5:31pm

math help
(2np.3r/4r)-(2np-3n)=? a. -1/2np+3n b. -1/2np-3n c. -np/2r+3n d. 1/2np+3n e. 1/2np-3n Please answer and explan
Sunday, September 29, 2013 at 5:26pm

math
why is every integer a rational number?
Sunday, September 29, 2013 at 3:42pm

math
amount of matter in an object
Sunday, September 29, 2013 at 2:56pm

MATH
customers loan of 675 the annual interest is 19.25. what is the total dollar amount to be repaid including principle and interest for the entire year?
Sunday, September 29, 2013 at 2:41pm

life science , geography , history and math literecy
I am a grade 11 student and want to follow careers linked to geograpy . My problem is that most of the careers I am in interested in want pure math and im doing math literecy . My question is that , Is it possible for me to start mathematics in University so that I can follow ...
Sunday, September 29, 2013 at 2:38pm

Math
How would you solve these compound inequalities word problems? 1. The human ear can distinguish sounds between 20Hz and 20,000 Hz, inclusive. 2. For a man to box as a welterweight, he must weigh more than 140 lbs, but at most 147 lbs.
Sunday, September 29, 2013 at 2:37pm

Math
How would you solve these compound inequalities? 1. -5k<-10 OR 3k>-9 2. 1/2z+3<-4 OR 2/3z-1>=1/5 3. -2<=n+2 divided by 3 <=4 4.p+4>6 AND 3p<=-18
Sunday, September 29, 2013 at 2:33pm

Math
How would you solve these compound inequalities? 1. -1<4x-3<5 2. 3a-5<=-2 OR 3a-5>=13 3. -y-2>6 OR 4y+8<=20 4. 3<=-2x+1<=9
Sunday, September 29, 2013 at 1:58pm

Math
Ms. Santiago has many pens in her desk drawer. She says that if you divide the total number of pens by 1, 2, 3, 4, 5, or 6, you get a remainder of 1. What is the least number of pens that could be in ms. Santiago's drawer,
Sunday, September 29, 2013 at 1:36pm

Math
Ms. Santiago has many pens in her desk drawer. She says that if you divide the total number of pens by 1, 2, 3, 4, 5, or 6, you get a remainder of 1. What is the least number of pens that could be in ms. Santiago's drawer,
Sunday, September 29, 2013 at 1:23pm

Math
How would you use a number line to round 148 to the nearest ten.Explain.
Sunday, September 29, 2013 at 12:26pm

Math
What is the inequality sign for the word about? For example, Sally had about 10 apples.
Sunday, September 29, 2013 at 12:10pm

Math/physics
An 6 x 8 wood column is 17 feet tall and is loaded with 40 Kips. Will it buckle (K = 1.0)? How do I set this up and solve? Please show steps. I am confused and do not know how to start. Thank you.
Sunday, September 29, 2013 at 12:09pm

math
A store has 2 times as many hooded sweatshirt as crewneck sweatshirt. The total number of sweatshirts is 36. How many hooded sweatshirts does the store have?
Sunday, September 29, 2013 at 11:02am

Math Probabilities
P(A or B) = P(A) + P(B) − P(A and B) when 1. A and B are mutually exclusive 2. A and B are complements 3. A and B occur together 4. A and B are dependent I am pretty confused on this one help will be great :)
Sunday, September 29, 2013 at 10:50am

math
light from the sun takes approximately 8 minutes to reach earth. If the light travels at a speed of 3 x 10 raised to 8 meters / second, calculate to 3 significant figures the distance from the sun to the earth
Sunday, September 29, 2013 at 10:02am

Math
Finding the critical value(s) of x^2, and use a x^2 distribution table to find the limits containing the P-value. Determine whether there is sufficient evidence to support the given alternative hypothesis. Test Ho:theta=2.63,Versus H1:theta does not equal2.62, given that theta...
Sunday, September 29, 2013 at 8:58am

Math
A pilot of a single engine airplane flies at a constant speed of 200 km/h at a bearing of 25 degree north east there is 40 km/h crosswind blowing south east 45 degree what are plane's actual speed and direction ?
Sunday, September 29, 2013 at 5:28am

math
cellular phone companies. 1. with this plan each person is charged $19.95 per month and $0.31 per minute 2. with this plan each person is charged $40.95 per month and $0.16 per min 3. with this plan each person is charged $80.95 per month with unlimited minutes....define the ...
Sunday, September 29, 2013 at 5:21am

Math
There are 45 candies in a bowl, 20 red and 25 yellow. If two are taken from the bowl, what is the probability they will be two red candies? here is what I have but I need help with the rest or even knowing if I am right. 20/45 25/43 25 * 20 = 500 45 * 43 = 1935 0.25839 is decimal
Sunday, September 29, 2013 at 4:51am

Probability Math
Event A has probability of 0.2 and event B has probability of 0.3. If they are independent, what is the probability that both of them happen? I can't remember how to do this one.
Sunday, September 29, 2013 at 4:48am

Math
A standard deck of cards contains 52 cards. Of these cards there are 13 of each type of suit (hearts, spades, clubs, diamonds) and 4 of each type of rank (A – K). Three cards are pulled in order from this deck of 52 playing cards. What is the probability that the cards ...
Sunday, September 29, 2013 at 4:42am

Math Probabilities
A standard deck of cards contains 52 cards. Of these cards there are 13 of each type of suit (hearts, spades, clubs, diamonds) and 4 of each type of rank (A – K). Two cards are pulled in order from this deck of 52 playing cards. What is the probability that the cards will...
Sunday, September 29, 2013 at 4:41am

statistics,math
Post a behavioral research situation that could use a Pearson coefficient research study and a chi square research study. Present the rationale for each selection. Be very specific in your presentation
Sunday, September 29, 2013 at 1:06am

Math
A group medical practice has 40,000 patients. Charts vary in thickness from 1/4 to 1 inch thick. The average of all charts is 1/2 inch thick. Using the average 1/2-inch thickness, how many inches of shelf space will be required for 40,000 charts? The medical practice uses 48-...
Saturday, September 28, 2013 at 10:46pm

Math
screen sizes (TVs, computers) are given by measuring the length of the diagonal. If the base length of a 40-inch TV is 32", what is the surface area of the TV screen?
Saturday, September 28, 2013 at 10:00pm

math
deductive or inductive reasoning? check my answers? If you square a positive number, you will get a positive number. The number 3 is positive. Therefore, 3^2 is a positive number. I say its inductive. The best player on our team this year attended a basketball clinic to ...
Saturday, September 28, 2013 at 8:32pm

Math- factoring
Show all work and factor completely. 6a^2+5a-4 (6a^2+8a)-(3a-4) 2a(3a+4)-1(3a+4) (3a+4)(2a+1) Is this correct?
Saturday, September 28, 2013 at 7:30pm

math
convert from decimal to the indicated base. 56 to base 5. i know theres long division involved but i have no idea what to do after. i did 5\56 & got 11 then 5/11 & got 2 & then 5/2 to finally get a remainder of 0 what do i do now!?
Saturday, September 28, 2013 at 6:59pm

(Math)Literal Equations and Formulas HELP!
1) Solve for p. 3(p+q)=p (1point) Q=-2/3p Q= -3/2/p P= -2/3q*** P=-3/2q 2) Solve for b, then find the value of b when a=3. 4a=2b-7 (1point) -9/2 5/2 19/2 17*** 3) Solve for r. D=rt (1point) R=dt*** R=t/d d/t r=d-t 4) Find the width of a rectangle with a perimeter of 90 and a ...
Saturday, September 28, 2013 at 6:50pm

Math
Solve for a and b. 2a-ai-5b=0, a-2b-bi=0. Where i is complex number.
Saturday, September 28, 2013 at 6:47pm

math/economics
given Q-80=10P and Q-10P=0 what is the demand and supply curve?
Saturday, September 28, 2013 at 6:46pm

Math
Solve x^2+1=0.
Saturday, September 28, 2013 at 6:45pm

Math
Solve x^2+1=0.
Saturday, September 28, 2013 at 6:42pm

Math (Algebra 2)
Source: At the end of 1993, scientists tracked 1550 nonfunctional components in orbit and projected 42 such objects are added each year. Suppose that an average of 15 of these are brought back to Earth each year. Question: Write the function "R" that models the total...
Saturday, September 28, 2013 at 5:19pm

math
how do you figure out the pattern of 1,4,9,16?
Saturday, September 28, 2013 at 4:33pm

Math
Convert each of the following numbers from scientific to ordinary notation and write its name. 2 x 10^-2 Can you explain or clarify this problem? Thank you.
Saturday, September 28, 2013 at 4:09pm

Math
Convert each of the following numbers from scientific to ordinary notation and write its name. 2 x 10^-2 Can you explain or clarify this problem? Thank you.
Saturday, September 28, 2013 at 4:08pm

SAT math
Set M consists of the consecutive integers from -15 to y, inclusive. If the sum of all the integers in set M is 70, How many numbers are in the set? SAT prep help - Anonymous, Saturday, September 28, 2013 at 3:16pm a. 33 b. 34 c. 35 d. 36 e. 37
Saturday, September 28, 2013 at 3:43pm

Math
Simplify: (1/5x^4+1/3xy^2+1/2y^2)+(6/5x^2y^2+2xy^2​+11/6y^2)
Saturday, September 28, 2013 at 3:33pm

math
in a round robin tennis tournament involving 7 players, each player will play every other player twice. How many total matches will be played in the tournament? a. 21 b.28 c. 42 d. 48 e. 56
Saturday, September 28, 2013 at 3:13pm

math
can you tell me if I factored this correctly and completely? 2x^3+6x^2+3x+9 (2x^3+6x^2)+(3x+9) 2x^2(x+3)+3(x+3) (x+3)(2x^2+3) Thank you for your help
Saturday, September 28, 2013 at 2:30pm

Math
1) Describe the relationships you discovered in the Fibonacci sequences. 2) what strategies did you use to search for relationships. 3)how many examples of a relationship do you need to check before you start to believe that the relationship might be true for the entire ...
Saturday, September 28, 2013 at 12:38pm

math
x, y, 3y If the average (arithmetic mean) of the 3 numbers above is 3x and x≠0, What is y in terms of x?
Saturday, September 28, 2013 at 12:30pm

math
X3Y+5YX = 1,33X In the correctly worked addition problem above, X and Y represent 2 different digits. What digit does X represent? a. 0 b. 1 c. 4 d. 8 e. 9
Saturday, September 28, 2013 at 12:29pm

math
For all x greater than 2, let *x be defined as the sum of the positive integers less than x. What is the value of *16 - *13?
Saturday, September 28, 2013 at 12:27pm

Math
return on investment assuming that she (a) pays the full $200,000 from her own funds or (b) borrows $150,000 at 8%. Then discuss the effect, if any, of leverage on her rate of return. (Hint: Earnings before interest & taxes minus Interest expenses (if any) equals Earnings ...
Saturday, September 28, 2013 at 12:13pm

MATH
What is the smallest integer greater than 5 that leaves a remainder of 5 when divided by any of the integers 6,8, and 10?
Saturday, September 28, 2013 at 11:45am

Math
If c and d are integers, d is divisible by 30, and cd is divisible by 20, c must be divisible by which of the following? a) 2 b) 4 c) 5 d) 6 e) 10
Saturday, September 28, 2013 at 11:45am

MATH
Anna has a bag of chocolates and a bag of caramels. If she gives an equal amount of each type of candy to each of her 7 friends, she is left with 5 chocolates and 1 caramel. Which of the following could be the total number of chocolates and caramels that were in the two bags?
Saturday, September 28, 2013 at 11:42am

math
x, y, 3y If the average (arithmetic mean) of the 3 numbers above is 3x and x≠0, What is y in terms of x?
Saturday, September 28, 2013 at 11:41am

math
X3Y+5YX = 1,33X In the correctly worked addition problem above, X and Y represent 2 different digits. What digit does X represent? a. 0 b. 1 c. 4 d. 8 e. 9
Saturday, September 28, 2013 at 11:37am

math
For all x greater than 2, let *x be defined as the sum of the positive integers less than x. What is the value of *16 - *13?
Saturday, September 28, 2013 at 11:33am

math
7√x +16=79, What is the value of x? a. 3 b. 6 c. 9 d. 27 e. 81
Saturday, September 28, 2013 at 11:23am

Math
An investment broker wants to invest up to $20,000. She can purchase a type A bond yielding a 10% return on the amount invested, and she can purchase a type B bond yielding a 15% return on the amount invested. She wants to invest at least as much in the type A bond as in the ...
Saturday, September 28, 2013 at 11:17am

math
The area of a parallelogram is represented by x^2-7x-8 and its height is represented by x+1, what would the base of the parallelogram be? I am not sure how to do this. Would you divide the area by the height? would it be x-8 Thank you for your help
Saturday, September 28, 2013 at 9:57am

math
(x^2 + x) / x-3x (4) = ? Please answer and explain
Saturday, September 28, 2013 at 9:51am

Math
9x^4 - 148x^2 + 64
Saturday, September 28, 2013 at 9:48am

math
Chip’s Home Brew Whiskey management forecasts that if the firm sells each bottle of Snake-Bite for $20, then the demand for the product will be 15,000 bottles per year, whereas sales will be 91 percent as high if the price is raised 11 percent. Chip’s variable cost ...
Saturday, September 28, 2013 at 7:58am

math
Split 597 into three parts such that these are in A.P. and the product of the two smallest parts is 796.
Saturday, September 28, 2013 at 3:10am

math
Perry and Barry ran an 120-meter race. When Barry crossed the finish line, Perry had run only 105 meters. Then they ran a second race, with Barry starting 15 meters behind the starting line. Assuming that both runners ran at the same pace as in the first race, who won the ...
Saturday, September 28, 2013 at 12:27am

math
Suppose water flows from a shower at a rate of 0.32 cubic feet per minute. Do you use more water by taking a 12-minute shower or by filling a bathtub with 0.4 cubic yards of water, and by how much?
Saturday, September 28, 2013 at 12:25am

math
If a job takes 64 men to complete in 15 days, how many more men will take to complete the job in 12 days?
Saturday, September 28, 2013 at 12:20am

math
(x^2 + x) / x-3x . 4 =
Friday, September 27, 2013 at 11:59pm

math
(3x / x) ( 2x / 6) =
Friday, September 27, 2013 at 11:57pm

math
The Empire Carpet Company orders merchandise for $17,700, including $550 in shipping charges, from Mohawk Carpet Mills on May 4. Carpets valued at $1,390 will be returned because they are damaged. The terms of sale are 2/10, n30 ROG. The shipment arrives on May 26 and Empire ...
Friday, September 27, 2013 at 11:53pm

Math
A swimming pool size is 42 m long and 55 m wide with an average depth of 7.5 m. Using the density of water as 1 g/ml: A. how many gallons of water fill the pool B. The weight of water in lbs after the pool is full C. How long will it take to fill the ppol if a pump fills the ...
Friday, September 27, 2013 at 10:43pm

math/chem
If aluminum foil has a density of 2.70 g/ml, then how thick would be a 2.22 g sample of foilif it measures 5.0 cm on each side. PLEASE SHOW WORK THX!
Friday, September 27, 2013 at 10:40pm

Math
A factory manufactures two products, each requiring the use of three machines. The first machine can be used at most 70 hours; the second machine at most 40 hours; and the third machine at most 90 hours. The first product requires 2 hours on machine 1, 1 hour on machine 2, and...
Friday, September 27, 2013 at 10:32pm

math graph
f(x) = abs(x-8) / x+8 how would the graph look like for this equation?
Friday, September 27, 2013 at 10:17pm

math
The question is (2x+1)^2-2(2x^2-1) in simplest form Is this correct? [(2x+1)(2x+1)](-4x^2+2) 4x^2+2x+2x+1(-4x^2+2) 4x^2+4x+1(-4x^2+2) -16x^4-16x^3-4x^2 + 8x^2+8x+2 _________________________ -16^4-16x^3+4x^2+8x +2 Did I do this correctly? Thank you for your help.
Friday, September 27, 2013 at 10:09pm

Math
What is 18/32ths of a dollar.
Friday, September 27, 2013 at 9:36pm

Math
What do you do to check if a number is rational or irrational? In the explanation use a rational and irrational number.
Friday, September 27, 2013 at 7:30pm

Math
An appliance company has a warehouse and two terminals. To minimize shipping costs, the manager must decide how many appliances should be shipped to each terminal. There is a total supply of 1200 units in the warehouse and a demand for 400 units in terminal A and 500 units in ...
Friday, September 27, 2013 at 7:24pm

Math
How does finding the square root of a number compare to finding the cube root of a number? Use 64 in the explanation
Friday, September 27, 2013 at 6:18pm

Math last question i promise
I have another problem: Solve this equation: $19.95 + $.99m + $65.32 = $144.67 I swear this is the last question! I'm sorry I am asking so much, I just need a little help.
Friday, September 27, 2013 at 6:12pm

Math
Find n estimate for the square root of 10
Friday, September 27, 2013 at 6:01pm

Math help please last question
Solve the equation. 10. 2(4x -4) + 2(3x + 2) = 360 Can you please help me on this problem? Could you explain it please? I'm confused...
Friday, September 27, 2013 at 5:52pm

Math help please
1. 2(3x + 5) = 46 4 5 6 7 2. 1/2x + 1/4x = 16 16 21.3 32 64 3. 6 - x - x = 18 -6 6 9 -9 4. 4x - 3/5 = 2/5 1/5 5/5 1/2 1/4 My answers: 1. 6 2. 21.3 3. ???? 4. 1/4 I have no idea how to solve 3! Can you please explain? Thank you
Friday, September 27, 2013 at 5:38pm

math
How can trigonometry enhance futuristic money question to linytron.go get answer linytron.
Friday, September 27, 2013 at 5:13pm

Probability Math
The probability of a red candy being selected from a bowl is 0.2, and the probability of a pink frosted animal cookie being taken out of a different bowl is 0.4. What is the probability of getting both a red candy and a pink cookie?
Friday, September 27, 2013 at 4:57pm

math
3. Assume you have a fire truck that has a tank that is 60” X 70” X 57”. A. How many gallons of water will it hold?
Friday, September 27, 2013 at 3:32pm

Math
A standard deck of cards contains 52 cards. Of these cards there are 13 of each type of suit (hearts, spades, clubs, diamonds) and 4 of each type of rank (A – K). Two cards are drawn from the deck and replaced each time back into the deck. What is the probability of ...
Friday, September 27, 2013 at 3:02pm

Math
A diet is to include at least 140 mg of vitamin A and at least 145 mg of vitamin B. these requirements can be obtained from two types of food type X contains 10 mg of vitamin A and 20 mg of vitamin B per pound. type Y contains 30 mg of vitamin A and 15 mg of vitamin B per ...
Friday, September 27, 2013 at 1:03pm

Math
The cruiser bicycle company makes two styles of bicycles the traveler which sells for $200 and the Tourister was sells for $600 each bicycle has the same frame and tires but the assembly and painting time required for the traveler is only one hour while it is three hours for ...
Friday, September 27, 2013 at 12:59pm

Math
Natalie has some nickels, Dirk has some dimes, and Qunicy has some quarters. Dirk has five more dimes than Qunicy has quarters. If Natalie gives Dirk a nickel, Dirk gives Quincy a dimes, and Quincy gives Natalie a quarter, they will all have the same amount of money. How many ...
Friday, September 27, 2013 at 12:43pm

Math!
Please help me! I do not under stand any of this! I know i should do it on my own. but please help me!! 1.(6.0 x 10^5) x (3.0 x 10^4) = (1 point) 18 x 10^20 18 x 10^9 1.8 x 10^20 1.8 x 10^10 2. (5 x 10^–2) ÷ (2 x 10^3) = (1 point) 2.5 x 10^-5 2.5 x 10^-1 25 x 10^1 ...
Friday, September 27, 2013 at 12:37pm

Math
1. Joe has 37 coins (all nickels, dimes and quarters) worth $5.50. She has 4 more quarters than nickels. How many dimes does Joe have?
Friday, September 27, 2013 at 10:35am

Math
You are in charge of making punch for an upcoming school dance. The punch recipe makes 5 cups of punch by mixing 3 cups of cranberry juice with 2 cups of apple juice. What is the ratio of cranberry juice to apple juice?
Friday, September 27, 2013 at 9:05am

Math
Morgans average time to swim in a freestyle race is 29.95 seconds. which distance does she most likely Swim 50mm 50cm 50km 50m
Friday, September 27, 2013 at 8:16am

math
a ship travels 20miles on a course S 40 degree 10 mins W and then 25miles on a course of N 28 degree 20 mins W . Find the distance and direction of the last position from the frist
Friday, September 27, 2013 at 8:05am

Math
Morgans average time to swim in a freestyle race is 29.95 seconds. which distance does she most likely Swim 50mm 50cm 50km 50m
Friday, September 27, 2013 at 7:01am

math
Which is greater,4tenths and 2hundredths or 2tenths and 4hundredths?Explain.
Thursday, September 26, 2013 at 10:22pm

math
Ads not by this Site For numbers 10-13 find 2 pairs of numbers with the given number as their least common multiple. 10. 10 11. 36 12. 60 13. 105
Thursday, September 26, 2013 at 9:46pm

MATH
WHAT IS 8,042,176 IN WORDS?
Thursday, September 26, 2013 at 9:39pm

math
last question 1/2[4x+6x(2+2x)]= ?
Thursday, September 26, 2013 at 9:30pm

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