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October 25, 2014

Homework Help: Math

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Recent Math Questions

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Math
1. Find the sum of the sequence: 32, -16, 8, -4, 2, .... My answer is 64/3. Am I correct?
Friday, October 17, 2014 at 6:44pm

MATH HELP PLEASE
Which of these numbers can be classified as both real and irrational? a. 5.85 b. 63.4 c. square root 21 d. square root 36 Is the answer D?
Friday, October 17, 2014 at 6:37pm

Math
[R] = [4/5 -3/5] and [S] = [-3/5 4/5] [-3/5 -4/5] and [4/5 3/5] are reflection matrices. Calculate [R·S] and verify that it can be identified as the matrix of rotation. Determine the angle of the rotation.
Friday, October 17, 2014 at 6:10pm

Math
Find the limit as h approaches 0 for ln(1+h)/h
Friday, October 17, 2014 at 5:38pm

math
Which of these numbers can be classified as both real and irrational? a. 5.85 b. 63.4 c. square root 21 d. square root 36 Is the answer D?
Friday, October 17, 2014 at 5:20pm

Math
Which statement is false? A. The number zero is a rational number. B. Some irrational are also rational numbers. C. Every irrational number is a real number. D. Every integer is a rational number Is the answer C?
Friday, October 17, 2014 at 5:13pm

Math
Which of these numbers is classified as a rational number? A. Square root 17 B. Square root 23 C. Square root 9 D. Square root 2 Is the answer C? Thanks
Friday, October 17, 2014 at 5:09pm

Math
Solve P=P(base 0)e^kt Solve for t? I have no idea how to solve this
Friday, October 17, 2014 at 5:07pm

Math
Which is an integer? A. 23 B. 1/4 C. Square root 27 D. 3.402538 Is the answer A? Thanks
Friday, October 17, 2014 at 5:03pm

MATH HELP PLEASE
Which of these numbers can be classified as both real and irrational? a. 5.85 b. 63.4 c. square root 21 d. square root 36 Is the answer D?
Friday, October 17, 2014 at 4:53pm

Math
1.What is the smallest possible value of 2x^4+(8/x^4) over all real nonzero values of x? To find the minimum value you have to factor it, but I am not sure how to factor this. 2.What is the maximum value of c such that the graph of the parabola y=1/3x^2 has at most one point ...
Friday, October 17, 2014 at 3:37pm

Math
1. Find all values of p such that 2(x+4)(x-2p) has a minimum value of -18. I know that y is the minimum value,I know x is -4. But, I am not sure how to find p. 2.The temperature of a point (x,y) in the plane is given by the expression x^2+ y^2 - 4x + 2y.What is the temperature...
Friday, October 17, 2014 at 3:29pm

Math
I just wanted to double check that I am correct. 1.Find the zeros for the function: f(x)= 4(x-3)(x+2)(x-4)^2 Zeros are: 3,-2, 4(multiplicity 2) 2.Find the zeros for the function: f(x)= x^3-9x Zeros are: 0, 3, -3
Friday, October 17, 2014 at 3:06pm

Math
Hi, I need help with figuring out how I calculated this question because my math teacher is asking "But my question is how do you get √2/2 How did you come up with that calculation?" Here's the question and my work for it: Chang is participating in a ...
Friday, October 17, 2014 at 2:20pm

Math
Suppose cosA = 12/13 with 0º≤A≤90º. Suppose also that sinB = 8/17 with 90º≤B≤180º. Find cos(A - B).
Friday, October 17, 2014 at 1:41pm

Math
why would I have uarrived at square root 2 over 2 in this question Chang is participating in a charity bicycle road race. The route starts at Centreville and travels east for 13 km to Eastdale. He then makes a 135° turn and heads northwest for another 18 km, arriving at ...
Friday, October 17, 2014 at 1:13pm

math
Find the angle, in degrees, between two adjacent sides of the pyramid. P(2, 0, 0), Q(2, 2, 0), R(0, 2, 0), (base points) S(1, 1, 7) (tip point)
Friday, October 17, 2014 at 12:31pm

math
Find the distance between the point and the plane. (2, 5, 3) 3x + 2y – 3z = –6
Friday, October 17, 2014 at 12:28pm

Math
Please help me! I know I am not showing my work but I don't even know how to solve these! Please help me! Tell whether the given equation has the ordered pair as a solution. 1. y = 6x; (3,16) 2. y = -4x; (-2,8) 3. y = x - 3/4; (2,1 1/4) PLease help me understand how to do ...
Friday, October 17, 2014 at 11:49am

math
Katarina made 6 book covers in each color: red, green, yellow, and purple. She gave 5 book covers to each of her 3 best friends, then she gave 2 book covers to her cousin. How many book covers does Katarina have now?
Friday, October 17, 2014 at 11:16am

Math
A theatre company allows a group of 10 people to buy theatre tickets at a price of $28 per person. For each person in excess of 10, the price is decreased by $2 per person for everyone down to a minimum of $10 per person. What number of people will produce the maximum revenue ...
Friday, October 17, 2014 at 10:40am

7th grade math
Not sure how to solve this: Suppose your school is selling magazine subscriptions. Each subscription cost $20. the company pays the school half of the total sales in dollars. The school must also pay a one-time fee of $18. What is the fewest number of subscriptions that can be...
Friday, October 17, 2014 at 8:05am

math
a car goes to 10km due south,then it turns west and goes 5 km.Now it turns back and goes 10km due north.Where is the car from starting point?
Friday, October 17, 2014 at 1:27am

math
Solve the initial value problem 3(y-1)^2 = y'', with y(0) = 3 and y'(0) = 4. Assume y does not equal 1.
Friday, October 17, 2014 at 1:20am

math
lori recently rode her bike to her friend's house, 8 miles away. On her way back she rode 15mph faster than on her way there. She spent a total of 2 hours biking. What was her average speed each way?
Friday, October 17, 2014 at 12:45am

math
how many different combinations can you make using pennies, nickels, dimes, quarters, and the half dollar that equal 60 cents?
Thursday, October 16, 2014 at 11:53pm

math
determine the number of zeros at the end of 50! using prime factorization
Thursday, October 16, 2014 at 11:20pm

Math
How many different combinations using pennies, nickels, dimes, quarters, and half dollar pieces can you make to equal 60 cents
Thursday, October 16, 2014 at 10:34pm

math
A woman owns stock in two companies, company A and company B. She owns 79 shares of stock in company A. Each share of stock in company A is worth $12. Each share of stock in company B is worth $19. Write three equations to represent the total number of shares of stock the ...
Thursday, October 16, 2014 at 10:21pm

Math
Which group names all the whole number factors of a composite number? A. 1, 2, 3, 6, 9, 36 B. 1, 3, 5, 9, 45 C. 1, 3 D. 1, 2, 3, 4, 6, 8, 12, 24
Thursday, October 16, 2014 at 10:19pm

Math
What is the sum of the geometric sequence 4/3, 2/3, 1/3, 1/6, ....? I got 8/3, am I right?
Thursday, October 16, 2014 at 9:41pm

Math
What is the value of x in the sequence x+1, 2x+2, 5x+1, .....
Thursday, October 16, 2014 at 9:39pm

Math
Joelle works a part time at a grocery store to earn extra money to buy a furniture set that costs 1200 dollars She currently has 750 saved and wants to add 35 dollars each week from her paycheck Write an inequality that could be used to determine w the number of weeks she will...
Thursday, October 16, 2014 at 8:41pm

math
From a box containing 5 blue marbles,10 red marbles,and 8 yellow marbles,Lisa removed 3 marble,one of which was blue.f she removes one more marble at random,what is the probability that it will be blur? a. 1/4 b. 5/21 c. 1/5 d. 2/7 e. 1/6 please answer and explain
Thursday, October 16, 2014 at 8:38pm

math
Equivalent of five thousandths
Thursday, October 16, 2014 at 8:28pm

math
Thank you Ms. Sue.
Thursday, October 16, 2014 at 7:50pm

math
A cooked steak weighs 6 tenths of a pound, Mario eats 9/10 of the steak. How much did the portion that he ate weigh?
Thursday, October 16, 2014 at 7:27pm

math
what is the ratio of the circumference of circle to its radius?
Thursday, October 16, 2014 at 7:07pm

math
jills fish weighs 8 times as much as her parakeet. together the pets weigh 63 ounces. how much does the fish weigh
Thursday, October 16, 2014 at 6:28pm

math
segment A'B is the image of segment A'B after a translation up by 6 units
Thursday, October 16, 2014 at 6:08pm

Math
Samantha wants to find the height of a pine tree on her yard.she measures the heigth of the mailbox at tree feet and it shadow at 4.8 feet. Then she measures the shadow of the tree at 56 feet . How tall is the tree?
Thursday, October 16, 2014 at 6:06pm

Math
Joel works part time at a grocery store to earn extra money to buy a furniture set that costs 1200 She currently has 750 saved and wants to add 35 dollars each week from per paycheck Write an inequality that could be used to determine w the number of weeks she will have to ...
Thursday, October 16, 2014 at 5:55pm

Math
Solve the following equation for y 1/2y-2=1/3x
Thursday, October 16, 2014 at 5:46pm

Math
Felix wants to get at least one hour of exercise each day Today he has run for 40 minutes. Write and solve an inequality that shows how much longer he needs to exercise to reach his goal x=hour x>40
Thursday, October 16, 2014 at 5:43pm

Math
Susan has a balance of 110 dollars in her school lunch account and she spends 6 dollars per day for lunch. Her sister Evelyn has $83 in her account and she spends 4 dollar per day for lunch. Write and solve an inequality that shows in how many days will Susans lunch account ...
Thursday, October 16, 2014 at 5:42pm

Math
AV needs to raise 700 dollars for their field trip. They have already raised 315 dollars by selling cookies in the Library. If there are 2 weeks (schol days only) to raise their remaining money how much money will need to be made daily
Thursday, October 16, 2014 at 5:38pm

Math
What is the negative square root to 90 to the nearest integer? A. 3 B. -5 C. 7 D. -9 Is the answer D? Thanks
Thursday, October 16, 2014 at 5:24pm

Math algebra Help please
A right triangle has an area of 24 ft^2 the dimensions of the triangle are increased by a scale factor of 6 A.48ft^2 B.72ft^2 C.144ft^2 D.864ft^2
Thursday, October 16, 2014 at 5:14pm

Math
What is the solution to the square root 8 to the nearest integer? A. 3 B. 5 C. 7 D. 9 Is the answer A? Thanks
Thursday, October 16, 2014 at 5:11pm

Math
Should the phrase (the product of 2 plus a number divided by 3 and a number minus 4) be expressed as 2 + (n/3)+(a-4) Thank You
Thursday, October 16, 2014 at 5:09pm

Math
estimate the area of the rectangles 5 7/9 by 3 1/5 7 7/8 by 1 1/3 Estimate each product. 3/8 X 4
Thursday, October 16, 2014 at 4:33pm

General Math I
Hi Ms. Sue this is Shayna here. I am writing you this time, because I am very confused in a question of a test I just took this was the question Susan wants to buy a paddle boat for $840. She will pay 20% down and pay the rest in six monthly installments. What will be the ...
Thursday, October 16, 2014 at 4:21pm

Math
Would this phrase the quotient of 2 and the sum of a number and 5 be expressed as (4 / 2) + (x + 5)? Any help would be appreciated. Thank You
Thursday, October 16, 2014 at 4:20pm

math
each rabbit costume needs one and one half yards of white fur fabric,a yard of blue striped fabric,and a quarter of a yard of pink felt for the ears.
Thursday, October 16, 2014 at 4:13pm

2nd grade math
It is greater than 43 and less than 52. If you add the digits, the sum is 8. Write the number word
Thursday, October 16, 2014 at 4:07pm

Math
there are some nickels and dimes in a jar. the number of nickels is one less than twice the number of dimes.if the total value of coins is 8 dollars and 55 cents, then find the numbers of dimes? explain?
Thursday, October 16, 2014 at 3:36pm

Math
Find all solutions to 7cosθ - 1 = 9cosθ.
Thursday, October 16, 2014 at 1:33pm

Math
Find all solutions to 5cosθ = 3cosθ - 1.
Thursday, October 16, 2014 at 1:31pm

math
Of 320 consumers polled, some purchase Blu-ray movies, some only purchase movies on DVD, and some do both. If 300 people polled purchase Blu-ray discs and 280 purchase DVDs and Blu-ray discs, how many people only buy DVDs?
Thursday, October 16, 2014 at 12:59pm

Advanced math
Find the original generating function in closed form for (1,2,3,4,5,...).
Thursday, October 16, 2014 at 12:53pm

Math
Find all solutions to the equation 1 = 2cos θ.
Thursday, October 16, 2014 at 12:35pm

Advanced math
Show the number of partitions of n in which only odd parts may be repeated equals the number of partitions of n in which no part appears more than three times
Thursday, October 16, 2014 at 12:07pm

Algebra
Find the 20th term of the following sequence. -6, -4, -2, 0, ... 32 44 46 I did the math but I don't know if it's correct, I'm not very good in math.
Thursday, October 16, 2014 at 11:12am

Math
A={w|w<1} B={w|w >or= 6} Please explain this to me I am lost.
Thursday, October 16, 2014 at 10:06am

Math
Is this a geometric sequence? x + 1, 2x + 2, 5x + 1 .....
Thursday, October 16, 2014 at 9:08am

math
Ralph bought 4 books for k dollars each. Iris bought 5 books for k dollars each. If together they spend 90 dollars, how much is each book? 4k+5k=90 so 9k=90 90/9=10 so $10 each
Thursday, October 16, 2014 at 8:41am

math
what the difference of 13 over 32 and 1 over 2
Thursday, October 16, 2014 at 8:28am

math
Rhonda bakes p pies. Mary bakes 3p pies. If together they bake 20 pies, how many pies does Mary bake?Rhonda bakes p pies. Mary bakes 3p pies. If together they bake 20 pies, how many pies does Mary bake? I would've thought p+3=20 so 20-3=17 making it p=17 but not sure that ...
Thursday, October 16, 2014 at 8:24am

math
solve this equation a divided into 7=20 the actual problem has the divide sign. I got a=20*7 so a=140
Thursday, October 16, 2014 at 8:11am

Math
Do you need to regroup to find 73-35? Explain your answer.
Thursday, October 16, 2014 at 6:44am

Math
1. Find the sum of the first five terms of the sequence 2/3, 2, 6, 18, ..... 2. Is this a geometric sequence? 2x, (4x-2), (6x-4), ..... 3. Show the equivalent values of the decimal 0.7575757575..... in fraction form. 4. What is the sum of the geometric sequence 4/3, 2/3, 1/3, ...
Thursday, October 16, 2014 at 5:25am

math
-2/5x - 9 < 9/10
Thursday, October 16, 2014 at 3:05am

Advanced math
use integration to find the volume of a pyramid with heighs and square base witht of 6 unit and square base with sides of 4 units
Thursday, October 16, 2014 at 1:47am

7th grade math
Not sure how to solve this: Suppose your school is selling magazine subscriptions. Each subscription cost $20. the company pays the school half of the total sales in dollars. The school must also pay a one-time fee of $18. What is the fewest number of subscriptions that can be...
Thursday, October 16, 2014 at 12:15am

Math
Which of these two form a geometric sequence? 1. 2x, 4x - 2, 6x - 4 ..... 2. x + 1, 2x + 2, 5x + 1 .....
Wednesday, October 15, 2014 at 11:56pm

4th grade math
mrs jacksin bought 6 gallons of juice for a party. each gallon has 16 cups. if 3 cups of juice were left over, how many cups did people drink at the party? Please help
Wednesday, October 15, 2014 at 11:28pm

math
Simplify 3√45x-√27x+17√3x-9W​30;125x^3
Wednesday, October 15, 2014 at 11:25pm

Analytical Chem
The following electrochemical cell can be used to calculate the formation constant Kf for a metal and EDTA. The cell has a voltage of -0.262V. The right half cell contains a metal (M^2+) with a standard reduction potential of -0.236V. Calculate the Kf for the metal EDTA ...
Wednesday, October 15, 2014 at 11:15pm

math
A pair of blocks of the mass M =30.7 kg, and 2 M are dragged over a rough, horizontal surface by two constant forces of magnitude F=98.0 N. The angle α = 22.7 ° . The blocks are displaced 7.5 m, and the coefficient of kinetic friction is 0.258. *for the normal force ...
Wednesday, October 15, 2014 at 10:56pm

Math
a car is 48 times bigger than a model that you are building if the tires are 27 inches tall how tall will the tires on the model be
Wednesday, October 15, 2014 at 10:54pm

Math
Estimate then record the product $53 times 4
Wednesday, October 15, 2014 at 10:32pm

math
The number 199,557 contains two sets of digits in which one digit is ten times as great as the other. What are the values of the digits in each set?
Wednesday, October 15, 2014 at 10:23pm

math
Data were recorded for the demand and revenue of a given product. Find the linear regression line which represents the revenue function. Find the quadratic regression curve which represents the revenue function. Data Demand x Revenue y 1 0 100 2 4 139.2 3 8 176.8 4 12 212.8 5 ...
Wednesday, October 15, 2014 at 9:55pm

Math
True or false: as then number in the sample becomes larger and larger (assuming it means as the sample gets larger and larger), then the mean of the sampling distribution is equal to the population distribution for any normal population. Is it false? That it would be ...
Wednesday, October 15, 2014 at 9:53pm

math
A board is two thirds yard long cut into six equal pieces how long is each piece
Wednesday, October 15, 2014 at 8:58pm

Math
Is there another way to write this equation? y=35.15e^1.04x
Wednesday, October 15, 2014 at 8:52pm

Math
the amount of simple interest earned in a savings account varies directly with the amount of money in the savings account with the amount of money in the account. A certain bank offers a 2% savings rate write a direct variation equation for the amount of interest, y earned on ...
Wednesday, October 15, 2014 at 8:39pm

Math
A plane takes off from a local airport. It travels due north at a speed of 400km/h. The wind blows the plane due east at a speed of 50 km/h. How far is the plane from the airport after 1h. Give your answer to one decimal place
Wednesday, October 15, 2014 at 8:38pm

math
Martha is covering kitchen shelves with shelving paper. She has 6 shelves that are each 1 ¾ feet long. She buys 13 ¼ feet of shelving paper of the correct width. Which equation can be used to determine how much paper she will have left over? would that equation ...
Wednesday, October 15, 2014 at 8:33pm

Math
y=4x-10
Wednesday, October 15, 2014 at 8:32pm

Math 112
On your first two exams, your grades are 86% and 88% x=86 and y=88 What must you get on the third exam to have an average of 90%?
Wednesday, October 15, 2014 at 8:31pm

Math check
Add and simplify 9 ft 6in 8ft 8in 8ft 5in 7ft 11in 6ft 7 in _______ 38ft 37in
Wednesday, October 15, 2014 at 8:27pm

Quick math help
I'm on the topic of "Algebra proofs". Is this statement an example of a transitive property?: If CD=AB and AB=8 then CD=8 Here's another problem I want you to check& note that I only have 4 blanks per side of the table (statements and reasons) Given: 2(x+3)=...
Wednesday, October 15, 2014 at 8:23pm

math
Write three decimals that are equivalent
Wednesday, October 15, 2014 at 8:22pm

math
What is AB x BC?
Wednesday, October 15, 2014 at 8:15pm

math
Marcus Has 5 sticks, He gave away 0.75 of each stick away. How Many Did He He Give Away
Wednesday, October 15, 2014 at 8:11pm

Math
Please check 2/5 + (-7/8) = -6
Wednesday, October 15, 2014 at 8:09pm

Math
Please check 15/16 x 2/3 = 5/8
Wednesday, October 15, 2014 at 7:59pm

Math
3/4 of a puzzle in 7/8 hours What's the unit rate?
Wednesday, October 15, 2014 at 7:57pm

Math
What's 4.32(3.7 + 1.65) I have 5.35 so far. And I'm just making sure what the answer is for 4.32 x 5.35
Wednesday, October 15, 2014 at 7:24pm

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