Tuesday

March 31, 2015

March 31, 2015

**Branches of Math**

**Recent Math Questions**

Post a New Question | Current Questions

**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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