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March 31, 2015

Homework Help: Math

Branches of Math

Recent Math Questions

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math
Emma os using connecting cubes to make a rectangular model with a height of one connecting cube. With her cubes she can make the model in exactly 3 different ways. If Emma has more than 12 but fewer than 17 cubes how many cubes does she have
Thursday, February 19, 2015 at 10:01pm

Math
840 stickers were given to 42 children. ⅔ of the children were boys, and each of them received the same number of stickers. Each girl received twice as many stickers as each boy. How many stickers did each girl receive? Explain how you got your answer. Sorry I posted ...
Thursday, February 19, 2015 at 9:44pm

MAth
840 stickers were given to 42 children. ⅔ of the children were boys, and each of them received the same number of stickers. Each girl received twice as many stickers as each boy. How many stickers did each girl receive? Explain how you got your answer.
Thursday, February 19, 2015 at 9:32pm

math
A cylinder is rolled three complete revolutions to create a rectangular shape 32 inches long and 12 inches wide. Write an expression for the area of the rectangle in terms of the diameter of the cylinder. Show how you could use this expression to find a formula for the surface...
Thursday, February 19, 2015 at 8:46pm

Math
The movie mike watched lasted 1 hour 26 minutes.how many minutes did the movie last?
Thursday, February 19, 2015 at 8:45pm

math
a 10 foot ladder is leaning againts a wall the base of the ladder is 2 feet from the base of the building, how far up the building does the ladder fall?
Thursday, February 19, 2015 at 8:01pm

inequalities (math)
write an inequality for this sentence the roller coaster is less than 3 minutes
Thursday, February 19, 2015 at 7:55pm

math
There is a slide in the park that is 18 feet long. The ladder to the top of the slide is 7.5 feet long. If the ladder and the slide are perpendicular, what is d, the distance from the top of the slide to the ground? If necessary, round to the nearest tenth
Thursday, February 19, 2015 at 7:45pm

Math
kristen has saved $20 in cash to spend at the mall.if she has 8 bills, how many of each kind of bill does she have?
Thursday, February 19, 2015 at 7:42pm

Math
If Javier bought 48 sports cards and 3/8 are baseball cards. How many are baseball cards
Thursday, February 19, 2015 at 7:33pm

Math
How do you go about solving this? If you got paid $15 for 3 hours of work one day and $45 for 8 hours of work on another day, find your hourly rate of pay for the 2 days
Thursday, February 19, 2015 at 7:31pm

Math
Tell whether the difference between the two integers is always, sometimes, or never positive. 1)Two positive integers. Never 2)Two negative integers. Sometimes. 3)A positive integer and a negative integer. Sometimes. 4)A negative integer and positive integer. Sometimes. Is ...
Thursday, February 19, 2015 at 7:29pm

math
cody has five coins that total $1.10. what are the coins?
Thursday, February 19, 2015 at 7:26pm

Math
q. Scott has different chores depending on the season. During the 5 warm months he mows the lawn, which takes about 1 in a half each week. During the 7 cold months, he shovels the snow when needed. This winter he shoveled show for total of 6 hours. How many chores did he do ...
Thursday, February 19, 2015 at 7:22pm

math
explain comparing fractions 21/25?
Thursday, February 19, 2015 at 7:03pm

Math
Posted by Marissa on Thursday, February 19, 2015 at 6:32pm. I am having difficulties trying to do rational expressions. I have to use the words Domain, Excluded Value, Set, Factor, and Real Numbers to show how I got the answer. Can someone please help me solve this one? g^2-6g...
Thursday, February 19, 2015 at 6:58pm

math
If 3000 dollars is invested in a bank account at an interest rate of 9 per cent per year, find the amount in the bank after 5 years if interest is compounded annually
Thursday, February 19, 2015 at 6:35pm

Math 222
I am having difficulties trying to do rational expressions. I have to use the words Domain, Excluded Value, Set, Factor, and Real Numbers to show how I got the answer. Can someone please help me solve this one? g^2-6g-55 ___________ g
Thursday, February 19, 2015 at 6:32pm

math
a recipe calls for 2/3 cup of flour i am making a amount that is 3/7 of the recipe how much flour do i need
Thursday, February 19, 2015 at 6:28pm

Math
In the formula d = rt, the time t varies inversely with the rate r. A student running at 5 miles per hour runs one lap around the school campus in 8 minutes. If a second student takes 10 minutes to run one lap around the school, how fast is she running?
Thursday, February 19, 2015 at 6:19pm

Math
List the numbers in least to greatest: 1/2,0.4,30%
Thursday, February 19, 2015 at 6:13pm

math
After 5 years, marcels account earned $ 600 in interest. If the interest rate is 0.03, how much did marcel initially invest?
Thursday, February 19, 2015 at 6:13pm

math
find the unit rate and use it to write an equation relating the two quantities? 62 dollars to rent 14 video games 62/14?
Thursday, February 19, 2015 at 6:13pm

Math
In the formula d = rt, the time t varies inversely with the rate r. A student running at 5 miles per hour runs one lap around the school campus in 8 minutes. If a second student takes 10 minutes to run one lap around the school, how fast is she running?
Thursday, February 19, 2015 at 6:09pm

math
whats 9 plus 10 many people are saying 21? i dont get it is there another way? please answer me im really confused of the question i have no work to be shown
Thursday, February 19, 2015 at 6:07pm

Math
The math question is "in a piggy bank there is a total of $15.75. If the ratio of dimes to quarters is 5:7, find the total amount in quarters. My question is, what formula would I use to solve this?
Thursday, February 19, 2015 at 5:57pm

Math
Find the equation of the line that passes through (-5,4) and (6,4) My work: M= 4-4/6+5 = 0/11 y=mx+b 4= 0(6) + b 4=b Y=4 Therefore, the equation of the line that passes through (-5,4) And (6,4) is y=4 Was this done correctly?
Thursday, February 19, 2015 at 5:55pm

Math
In a piggy bank there is a total of $15.75. If the ratio of dimes to quarters is 5:7, find the total amount in quarters.
Thursday, February 19, 2015 at 5:50pm

Math
Humans usually have 20 baby teeth which are replaced by 32 adult teeth Raul said he has lost 6/20 of his baby teeth. Write two fraction equivalent to this number explain how you came up with the fraction
Thursday, February 19, 2015 at 5:43pm

business math
How do you know which rule to use when it doesn't specify? All it says is find the derivative of the function. I haven't had algebra/calculus in over 20 years, I'm completely lost. Please help.
Thursday, February 19, 2015 at 5:41pm

Math 12
a) How many different sums of money can be made from a toonie, a $5 bill and a $10 bill. I think this equals 2^3-1 b) How many different sums of money can be made from the money in (a) as well as one more $10 bill? This should equal 11. c) Why does the situation become much ...
Thursday, February 19, 2015 at 5:22pm

math please help
In a triangle, the lengths of the sides are 3,7,and 8. If the perimeter of a similar triangle is 54, what is the length of the longest side of the larger triangle? *Im not sure on how to begin solving*
Thursday, February 19, 2015 at 5:20pm

Math
"The conjugate of the sum of two complex numbers is equal to the sum of the conjugates of the two complex numbers." This is true right?
Thursday, February 19, 2015 at 4:53pm

Math
How would you write 5 less than twice the length equals 11 in algebraic equation?
Thursday, February 19, 2015 at 4:36pm

Math
Hi! Can someone help me with these? Thanks a bunch! :) 1.) Find the dot product. <0, 3> ∙ <4, -2> 2.) Find the dot product of u and v. u = <-4, 1> v = <2, -3>
Thursday, February 19, 2015 at 4:29pm

math
The spinner is decided into 8 equal sections.2-e,3-a,1 b,1c,1d.If the spinner is spun 120 times how many times will the arrow land on E?
Thursday, February 19, 2015 at 4:07pm

math
A. Of 300 games that were randomly checked,6 games were defective.what is the experimental probability that a game is defective. And B.If the trend continues at this rate what is the best prediction of the number of defective games if 1,800 games were produced by this company
Thursday, February 19, 2015 at 4:00pm

math
Solve the equation sin (5/2θ) = -1/2 for 0°≤0 ≤ 180° sin(5/2θ) = -1/2 5θ/2 = -30 θ = -12 78, 168
Thursday, February 19, 2015 at 3:46pm

math
Consider a slide shaped like a right triangle. The base of the slide is 45 feet away from the ladder. The top of the slide is 20 feet high. a) What is the slope of the slide. b) write an equation for the line that the slide would form. c) Lets say you were standing at the ...
Thursday, February 19, 2015 at 3:27pm

math
HOW do I solve this equation? 6X -5(-X - 13)=131. WHAT IS THE RULE OF ORDER TO DO THIS? THANK YOU
Thursday, February 19, 2015 at 3:21pm

Math
Could someone help with this problem, I have tried numerous of times to solve it. Thank you. Achieve $225,500 at 8.55% compounded continuously for 8 years, 125 days.
Thursday, February 19, 2015 at 3:10pm

math
358/3= Estimate with 1 digit divisor
Thursday, February 19, 2015 at 2:55pm

math
Hi, Im having trouble with this math equation.. if you can, can you please help me and explain. the equation is : 3/7d=5/4 You have to find the solution. Thank you
Thursday, February 19, 2015 at 2:41pm

MATH
determine the average savings balance on a particular day. error of tolerance is 50. what is the minimum number of accounts he must sample to construct a 95% confidence interval. the standard deviation is 350
Thursday, February 19, 2015 at 1:48pm

math
Pete is standing 2 feet away from a mirror on the ground. Pete is 5 feet tall and can just see the top of the tree in the mirror from where he is standing. The two triangles formed in the picture above are similar. If the mirror is 12 feet away from the base of the tree, how ...
Thursday, February 19, 2015 at 1:36pm

math
Consider a slide shaped like a right triangle. The base of the slide is 45 feet away from the ladder. The top of the slide is 20 feet high. a) What is the slope of the slide. b) write an equation for the line that the slide would form. c) Lets say you were standing at the ...
Thursday, February 19, 2015 at 1:21pm

math
A basket contained 75 brown eggs and some white eggs. Salima found that 15% of the total number of eggs were rotten. Of the rotten eggs,2/3 were white and the remaining 6 were brown. a) How many white eggs were there altogether? b) How many eggs were not rotten?
Thursday, February 19, 2015 at 12:42pm

math
1.. Write the decimal three and four thousandths. 2.. the ratio of apples to bananas is 4:1.
Thursday, February 19, 2015 at 12:20pm

math
A group of 148 people is spending five days at a summer camp. The cook ordered 12 pounds of food for each adult and 9 pounds of food for each child. A total of 1410 pounds of food was ordered. Write a system of equations that describes this situation, and define your variables...
Thursday, February 19, 2015 at 11:11am

math
Jamal wants to put a rectangular frame on the above picture of the snowboarder. He has 18 cm of string to make the frame. Does he have enough for the frame? Explain why your answer is correct.
Thursday, February 19, 2015 at 10:06am

Math/Compound Interest
1. Use the compound interest table to find the compound amount earned on a $5,900 deposit for 10 years at 10% compounded semiannually. _____________________________________ A. 9,610.45 b. 15,654.47 c. 3,710.45 d. 12,375.66 2. Megan deposited $6,000 in an account that pays 4% ...
Thursday, February 19, 2015 at 9:56am

Math
Given the following information about a sample, calculate a z score for a test grade of 91. = 87, s = 4.01
Thursday, February 19, 2015 at 9:25am

Math
What is the total of 7 pieces of wire, each wire is 3/8 of a foot long?
Thursday, February 19, 2015 at 7:25am

math
How do prove without using a formula , that the sum of the series 3²+3³+3to the power of 6+...to 20 terms is given by S20 =9/8(9to the power of 20 -1)
Thursday, February 19, 2015 at 7:14am

MATH
In the arithmertic sequence series: a+(a+d)+(a+2d)+...+(l-d)+l,a is the first term,d the common difference and l the last term. how do prove that Sn=n/2[a+1]
Thursday, February 19, 2015 at 7:06am

MATH
A new sequence is formed by adding together the corresponding terms of a geometric sequence and an arithmetric sequence. the geometric sequence has a common ratio of 3 and the arthmetric sequence has a common difference of -2. The first two terms of the new sequence are 4 and ...
Thursday, February 19, 2015 at 6:55am

math
please explain #urgent the sum to infinity of a convergent series is 243. the sum of the first five terms is 242. how do you determine the values of the common ratio and the first term
Thursday, February 19, 2015 at 6:48am

math
Organisers for a polytechnic graduation has three sections of chairs to seat graduates, faculty and invited. 1120 chairs have been arranged for the graduatesm 1400 for the invited guests and 896 for the lecturers, if all the rows have the same number of chairs, calculate the ...
Thursday, February 19, 2015 at 5:19am

math
the 6th term of A.P. is 5 times the fifth term and the 11th term is exceeds twice the fifth term by three.find the 8th term
Thursday, February 19, 2015 at 1:26am

Math
I made graphs and th enext step is to create equations... Write the equation of each cycle in the form y=sin(bx+c). What is the Period and Phase Shift for the ophysical, emotional, and intellectual cycles? Feb. 13th, 2015 is at the origin. I dont' exactly get what a period...
Wednesday, February 18, 2015 at 11:37pm

math
The principal ordered four pizzas for the twelve students of the month. If each pizza has 8 pieces, what is the ratio of pieces of pizza to students of the month? Reduce your answer to lowest terms.
Wednesday, February 18, 2015 at 11:23pm

Math
How you know that 15/30 is greater than 1/3 but less 2/3
Wednesday, February 18, 2015 at 10:50pm

math
An equilateral hexagon has sides that are 2cm greater than those of a nearby square,if the perimeter of hexagon is 4 1/2times that of square what are sides lengths of them
Wednesday, February 18, 2015 at 10:24pm

math
a bicycle with a diameter of 24 inches is pedaled at a speed of 70 rotations per minute. find the distance the bike will travel in 48 mins
Wednesday, February 18, 2015 at 10:22pm

math help
The perimeter of triangle RXA is 39, PX=4 and AP=9.Find RX and RA.  P is at the middle.  I think it's under triangle bisector theorem. Help me answer this guys. Thanks
Wednesday, February 18, 2015 at 10:22pm

Math-Biorhythms
Write the equation of each cycle in the form y=sin(bx+c). What is the Period and Phase Shift for the ophysical, emotional, and intellectual cycles? Feb. 13th, 2015 is at the origin. I dont' exactly get what a period is and where you get the b and c values. Any help would ...
Wednesday, February 18, 2015 at 9:53pm

Math
There are 10,000 lockers. One person opens all the lockers. The second person closes every 2 doors. The third person counts every three locker and does the opposite to the locker. (Open/close it.) The fourth person counts every fourth locker and does the opposite to it. The ...
Wednesday, February 18, 2015 at 9:51pm

Math
There a rectangle fence the area is 635.4 square ft the width is 18ft what is the length of the fence
Wednesday, February 18, 2015 at 9:36pm

Math-percentages
The ratio of blueberries to blackberries in a fruit smoothie is 4:12. What percent of the drink is blueberry?
Wednesday, February 18, 2015 at 9:33pm

Math
There are 10,000 lockers. One person opens all the lockers. The second person closes every 2 doors. The third person counts every three locker and does the opposite to the locker. (Open/close it.) The fourth person counts every fourth locker and does the opposite to it. The ...
Wednesday, February 18, 2015 at 8:55pm

Math/algebra
9/55 8/62 5/37
Wednesday, February 18, 2015 at 8:55pm

Math Help Please
I can't solve this problem: 4x^3 + 5x^2 - 12 + 27/(x + 3) A. 4x^2 - 7x + 9 B. 4x^2 + 7x + 9 C. 4x^2 - 7x + 27 D. 4x^2 + 7x + 27 I can only get 4x^2 - 7x + 21 but obviously that isn't an answer..
Wednesday, February 18, 2015 at 8:13pm

math
Rafi is upgrading his cell phone and monthly service plan.Triax Cell offers a new phone for $50 and unlimited service for a monthly fee of $40.CellUR offers a new phone and unlimited service for a monthly fee of $50. After how many months will the cost of the two phones and ...
Wednesday, February 18, 2015 at 7:41pm

Math Help
Hi! Can someone please help me with these? Thanks! :) Directions: Look for the direction angle for vector v. If necessary, round your answer to the nearest tenth of a degree. 1.) v = 8i - 10j 2.) w = -4i - 3j
Wednesday, February 18, 2015 at 7:36pm

Math
u = <7, -3> and v = <-2, 4>. Find u + 3v.
Wednesday, February 18, 2015 at 7:34pm

Math
The ratio of oil to vinegar in a certain salad dressing is 8:5. How much oil must be blended with 7 liters of vinegar for that recipe?
Wednesday, February 18, 2015 at 7:30pm

Math
Q. Scott has different chores depending on the season. During the 5 warm months, he mows the yard which takes him about 1 in a half hours each week. During the 7 cold months, he shovels snow when needed. This winter he shoveled snow for a total of 6 hours. How many hours of ...
Wednesday, February 18, 2015 at 6:37pm

math
Alyssa estimates she needs 3 hours of repair work. She chooses the company that is less expensive for the 3 hour job. How much will Alyssa spend on the roof repair?
Wednesday, February 18, 2015 at 6:36pm

Math
Q. Timothy has to take out the trash every day at his house. There are 11 trash cans in his house and it takes him 14 seconds per trash can to empty them into the big trash can in the garbage. About how many minutes does he spend emptying the trash in a seven day week? - A. Do...
Wednesday, February 18, 2015 at 6:29pm

Math
47. For science class, Kyle needs to make a dilute solution of 12 ounces that is 30% vinegar. But he only has 20% vinegar 60^ vinegar. How many ounces of 20% vinegar should he use? A. 3 ounces B. 6 ounces C. 9 ounces D. 10 ounces
Wednesday, February 18, 2015 at 6:02pm

3rd grage math
marcel wants to make a mobile using only 3-dimensional solids with curved surfaces. based on this attribute, what figures will marcel use on his mobile
Wednesday, February 18, 2015 at 5:50pm

Geometry (math)
The 100-foot clock tower in Rome, Georgia is more than 100 feet tall. The minute hand is 4 feet, 3 inches long, and the hour hand is 3 feet, 6 inches long. How many inches farther does the tip of the minute hand travel than the tip of the hour hand in one day? I'm not ...
Wednesday, February 18, 2015 at 5:48pm

Math
The function f(x) = x^2 -2x + x^1/2 is: A. A polynomial because it is continuous. B. A polynomial because it is of the form axn. C. Not a polynomial because you are subtracting 2x. D. Not a polynomial because you can’t have any fractional exponents. Is the answer D?
Wednesday, February 18, 2015 at 5:34pm

Math
Nine friends share pumpkin pies equally. What fraction of a pumpkin pie does each friend get ?
Wednesday, February 18, 2015 at 4:48pm

math
it costs $12.50 to see a movie at a theater near jason's house. it only costs $1,95 to rent a dvd from an online service a dvd player costs $125 to the nearest whole number, how many movies must jason watch on dvd instead of at the theater before he recover the cost of the...
Wednesday, February 18, 2015 at 4:39pm

ms Sue
Thank You for site. she is a whiz in fractions but going in this now and no math book to bring home. Love the sites you give Karen
Wednesday, February 18, 2015 at 4:34pm

Math Ms Sue
Which expression would you use to find the area of a rectangle with a width of 4 inches and a length of 6 inches? 4+6 4x6 8x12 8+12 Ms Sue this is Karen you helped in College English so well I am trying to help my 3rd grade granddaughter with no math book just problems
Wednesday, February 18, 2015 at 4:21pm

3rd grade math
The lengths of the sides of a garden are 24 ft, 14 ft, and 35 ft. What is the gardens perimeter?
Wednesday, February 18, 2015 at 4:02pm

Math
1.) What is the sum of 5/6 + 2/3 A.) 1 1/3 *** B.) 1 1/2 C.) 1 2/3 D.) 1 3/4
Wednesday, February 18, 2015 at 3:59pm

math
The coordinates of point P are (-3, 5). Point R is a reflection of point P across the x-axis. Point S is a reflection of point P across the y-axis. Point R is located in quadrant . Point S is located in quadrant .
Wednesday, February 18, 2015 at 2:52pm

math
Mr. Howard wrote the following expressions on the board in order to determine which expressions are equivalent and how they are equivalent. 60x+24, 3(20x+8, 4(15x+6) Explain which of these expressions are equivalent using properties of operations, and then determine how other ...
Wednesday, February 18, 2015 at 2:27pm

math
Part A: Which two numbers represented by dots on the number line above are opposites? Part B: Explain how the numbers' relationship to 0 makes them opposites. the dots are -15, -5, 10, 15, 20, 25, and 35
Wednesday, February 18, 2015 at 2:21pm

math
Craig is creating gift baskets for the food pantry to give away. He has 91 canned food items and 52 boxed food items, giving him a total of 143 items. The sum is shown below. He wants to make sure that every gift basket has an equal amount of canned food items and an equal ...
Wednesday, February 18, 2015 at 2:19pm

Math
How do you find the component form AND the magnitude of the vector v with initial point (1, 11) and terminal point (9, 3)?
Wednesday, February 18, 2015 at 2:11pm

math
multiply and find the excluded value(s) d^2+1/d+7*5d/d-1d
Wednesday, February 18, 2015 at 2:03pm

math
The cost, C, in dollars for a health club membership depends on the number of whole months, m, that you join. There is a $49.00 enrollment fee and the membership costs $20.00 per month. This function can be expressed with the equation C
Wednesday, February 18, 2015 at 1:31pm

Discrete Math
So, the question I got was: ∀x,(x =/= 0) → (∃!y, xy = 1) I'm really confused about what the "∃!y" means in this context, because the way I'm interpreting the question is: "For all x (when x is not equal to 0), there does not exist...
Wednesday, February 18, 2015 at 1:15pm

math
Mr. Howard wrote the following expressions on the board in order to determine which expressions are equivalent and how they are equivalent. 60x+24, 3(20x+8, 4(15x+6) Explain which of these expressions are equivalent using properties of operations, and then determine how other ...
Wednesday, February 18, 2015 at 12:46pm

Math
Fin the value of Theta if sec theta=3 I inverted the value of sec theta to get cos theta=1/3 I then said Theta=cos-1 (1/3) Is thus correct? What is the answer rounded to the tenths place?
Wednesday, February 18, 2015 at 12:42pm

Math
1. Directions: Type your response in the box. Part A: Which two numbers represented by dots on the number line above are opposites? Part B: Explain how the numbers' relationship to 0 makes them opposites. the dots are -15, -5, 10, 15, 20, 25, and 35
Wednesday, February 18, 2015 at 12:36pm

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