Friday
May 27, 2016

Homework Help: Math

Branches of Math

Recent Math Questions

math
The winning team's score in 13 high school basketball games was recorded. If the sample mean is 54.3 points and the sample standard deviation is 11.0 points, find the 98% confidence interval of the true mean.
Saturday, April 16, 2016 by alicia

Math
The tile store has three different brown tiles mr Jacobs can use. The tile prices are shown in the table. Which tile can he purchase to stay in his budget and meet the design for 38 tiles? His budget is $1200.00
Saturday, April 16, 2016 by Mary

Math
If n+1 is the largest of four consecutuve integers, represent the sum of four integers. A 4n+10 B 4n-2 C 4n-4 D 4n-5 E 4n-8 I really don`t understand this question so I can`t provide my work. Can someone please explain to me how to solve these types of problems. Thank you
Saturday, April 16, 2016 by Tamila

math
A student buys a pair of jean trousers at a 19% discount on the advertised price.if she wants to make a mark-up 20% after allowing a discount of 10%,by what percent should her marked price be greater than the original advertised price?
Saturday, April 16, 2016 by blodwick

Math
If three successive coefficients in the expansion of (1+x)n are 210,120 and 45 respectively, find n.
Saturday, April 16, 2016 by Olando

Math
What does a curved surface and a circle make? a. sphere b. cone *** c. cylinder d. The two shapes won't form a geometric solid.
Saturday, April 16, 2016 by Blake

Math
A circular water tank has a radius of 4 m. What expression describes the circumference of the tank in meters
Saturday, April 16, 2016 by Mary tran

Math
I'm horrible at word problems but Create a chart that has the following information for each of the three selected carriers: cost per month, base number of minutes, additional cost per minute (overage) Using the information from the chart you created, write the total ...
Saturday, April 16, 2016 by Jason

math
If the sum of n terms of the series 4+7+10+... is 209, find n
Saturday, April 16, 2016 by Ayomide

Math
In how many ways can 5 of 14 different sized and different colored beads be put on a string to form a necklace. would the answer be 14!/!9 ?
Saturday, April 16, 2016 by Stephanie

Math
Victoria is opening a pet store. She will start by making custom dog collars. If the collars cost her $3 each, the embellishments $2, and $0.15 per bag, what is her unit cost per collar?
Saturday, April 16, 2016 by Alaina

Math
ABC Game store sells new games, n, for $19 and used games, u, for $9. The store earned $7500 in revenue last month. The store sold 4 times as many used games as new games. Write a system of equations that represents this scenario.
Saturday, April 16, 2016 by Alaina

math
Write a matrix that represents the system of equations below. 7x – 3y = 21 5x – y = 85
Saturday, April 16, 2016 by Alaina

math
A trader bought two items of a total of R600. He sold one of them and realised a mark-up of 22% and from the other he realised a mark-up of 8%,and made no loss or profit in the end. Calculate the selling prices of the two items. [marks 9]
Saturday, April 16, 2016 by blodwick and kenny

Elementary Statistics
SAT math test scores for all students taking the test are approximately normally distributed with mean score of 514 and std. deviation of 118. What is the probability that a randomly chosen student will earn a score above 600 on their SAT math test? There's 19 students, ...
Saturday, April 16, 2016 by Leah

Math
The height of a triangular window is (x + 7) cm and the base measures (3x) cm. If the area of the window is 66 cm2, what is the height of the window?
Saturday, April 16, 2016 by Anonymous Girl

Math
Round 5,156 to the nearest ten.
Saturday, April 16, 2016 by Michele

Math
Xavier, Yessie, and Zorro each choose a different favorite positive fraction. Each fraction is in simplest form. Yessie's fraction is the reciprocal of Xavier's. Zorro multiplies his favorite fraction by Xavier's and finds a product of 12/35. Zorro then multiplies ...
Saturday, April 16, 2016 by Anonymous

Math (Geometry)
what is the exterior angle sum of a 500 gon? I got .72 but I'm not sure if this is right, help would be very grateful :)
Saturday, April 16, 2016 by Sue

Math
A set of 15 cards numbered 1 to 15. One card is drawn at random. What is the probability that it is a multiple of 3 of 5 or both?
Saturday, April 16, 2016 by Harikays

Further math
If the sum of the first n terms of the series 4 + 7 + 10 + ... is 209, find n.
Saturday, April 16, 2016 by Ayomide

math
Esme is going on a holiday with 13 friends. The total cost of the holiday is £5999.00 How much does Esme have to pay?
Saturday, April 16, 2016 by rebecca

math
Robert is going to cut seedling support stakes from a piece of wood measuring 175 centimeters. Each support stake will be 12 centimeters in length. How many support stakes can Robert cut?
Saturday, April 16, 2016 by rebecca

Math
A bucket holds 6 litres of water. A paddling pool is in the shape of a cuboid with dimensions 700mm x 1800mm x 3000mm. How many buckets of water would be required to fill the pool to the brim? 700mm=0.7m 3000mm= 3m 1800=1.8m 0.7 x 1.8 x 3 = 3.78m^3 37.8m^3 = 37,800L 37,800L &...
Saturday, April 16, 2016 by Anonymous

Math
Donations to an annual fundraiser are 15% greater this year than last year. Last year, donations were 10% greater than the year before. The amount raised this year was $10,120. How much was raised 2 years ago?
Saturday, April 16, 2016 by Laurie

math
Find all integers such that 3n+4/n+2 is also an integer.
Saturday, April 16, 2016 by ganesh pranav

math
Find the dimensions of an open topped box that can be made from 3600 cm^2 of cardboard, if the length of the base is three times as long as its width. What is the maximum volume?
Saturday, April 16, 2016 by Jim

Math
lola has 75$. she buys a pair of shoes on sale for one half off and a pair of socks for 6$. she has 32 left. which equation can be used to find x, the regular price of the shoes?
Friday, April 15, 2016 by Yanely

math
Find all x such that x^2+5x<6. Express your answer in interval notation. Thank you!
Friday, April 15, 2016 by Jane

Math
There is an expression some people use that says, “What you put into it is what you get out of it.” People might use this expression to describe your skills at a sport or activity and how that relates to the amount of time and effort you spend practicing that ...
Friday, April 15, 2016 by Sid.V

Math
There is an expression some people use that says, “What you put into it is what you get out of it.” People might use this expression to describe your skills at a sport or activity and how that relates to the amount of time and effort you spend practicing that ...
Friday, April 15, 2016 by Sid.V

math
how many 27 cubic inches fit into a 8ft crate?
Friday, April 15, 2016 by l

math
An equilateral triangle with a base of 20 cm and a height of 17.3 cm is divided into 4 smaller equilateral triangles. What is true about this figure? A. The total perimeter of all 4 triangles is 70 cm. B. The total area of all 4 small triangles is the same as the area of the ...
Friday, April 15, 2016 by mimirocks16

Math/Algebra
In the school election, votes were cast for Sam, Mary, and Bill in the ratio of 4:3:2. If a total of 2,178 votes were cast, how many votes did Mary receive?
Friday, April 15, 2016 by Noel

Algebra/Math
The difference of two numbers is 29. If five times the smaller number is twice the larger, the result will be one. What is the larger number ? Please help.. I need an answer in 10 days. Thank you, much appreciations.
Friday, April 15, 2016 by Wendy

Math
40 students are in the science club. 45% are girls. New girls enter the club and now the percentage of girls is 56%. How many new girls join the club?
Friday, April 15, 2016 by Laurie

math
The speed of a river current is 4 mph. IF a boat travels 20 miles downstream in the same time that it takes to travel 10 miles upstream, find the speed of the boat in still water.
Friday, April 15, 2016 by takeeyah

math
1 is 3, 2 is 3, 3 is 4, 4 is 4 and 5 is 4. How can this possible?(explain the rule)
Friday, April 15, 2016 by somay

Math--Parametric Equations
A hockey puck of diameter 3 inches is spinning around its center at a speed of 3 counterclockwise rotations per second. The center of the puck is traveling at a speed of 24 inches per second at an angle of 45 degrees to the positive x-axis. (a) At time t=0, the center of the ...
Friday, April 15, 2016 by Katie

math
Sound travels at 343 meters per second. You measured 3 seconds for sound travel from place A to place B. What is the distance between A and B? meters
Friday, April 15, 2016 by skyler

math
Which answer describes the calculations that could be used to solve this problem? Bonita brought 3 bags of apples and 2 pounds of grapes to the picnic. Each bag of apples weighed 4 pounds. How many pounds of apples and grapes did Bonita bring to the picnic? A. Add 2 + 3. Then ...
Friday, April 15, 2016 by diego

math.
1 is 3, 2 is 3, 3 is 4, 4 is 4 and 5 is 4. How can this possible?(explain the rule)
Friday, April 15, 2016 by somay

Math
The length of a pool is 8 times less than 5 times the width of the rectangular pool. The total distance around the pool is 140 feet. What is the actual length and width of the pool? what is the volume of the pool if the pool is 4 feet deep?
Friday, April 15, 2016 by Yvette

math
The difference between two numbers is 33. If three times, the larger number is subtracted from six times the smaller number, the difference is 18. Find the smaller number.
Friday, April 15, 2016 by Anonymous

math
Joe made 15 points in a basketball game, 3 points are given for a ''long shot,'' 2 points given for a field goal, and 1 point is given for a free throw. IN how many ways can Joe score 15 points?
Friday, April 15, 2016 by Anonymous

MAth
Claudia has test scores of 78, 88, 84, 92, 76, 98. If she wants to end up with a ''B'' average, what does she need to score on her next test?
Friday, April 15, 2016 by Anonymous

math
How is solving -4x=-4.8 different from solving -1/4x = -4.8? How are the solutions related?
Friday, April 15, 2016 by Veronica

math
For making lemonade, the correct ratio of lemon juice to water is 3 ounces of juice to 32 ounces of water. If you use different amounts in an equivalent ratio, the lemonade will still taste good. Which is an equivalent ratio
Friday, April 15, 2016 by rylee

Math
Which triangle is NOT possible to construct? Answers: A. A right isosceles triangle B. An acute equilateral triangle C. An Obtuse scalene triangle D. A right equilateral triangle My Answer: C. An Obtuse scalene triangle :) Thank you to anyone who helps. I appreciate it tons...
Friday, April 15, 2016 by Alyion

math
If I borrow Rs 700000@12%pa simple interest for 5 years. How much do I owe now? Rs 8000 been deducted from principal every month.
Friday, April 15, 2016 by bubu

Math
How do u find a rectangular prisms surface area? Please help c:
Friday, April 15, 2016 by LOVE

Math
simplify the expression x(5x – 4) 4x^2 – 5x –5x – 4x 5x + 4x –5x^2 + 4x
Friday, April 15, 2016 by Anonymous

Math
Which of the following expressions is true? A)8^3 • 8^2 < 8^4 B)4^4 • 4^4 = 4^16 C)2^2 • 2^6 < 2^8 D) 3^3 • 3^3 > 3^5 B?
Friday, April 15, 2016 by Anonymous

Math
For questions 15 and 16, multiply. Write the result in scientific notation. 15. (1.8 • 10^1)(7 • 10^5) 1.26 • 10^7 8.8 • 10^6 8.8 • 10^5 1.26 • 10^6 16. (2.2 ∙ 10^–3)(4 ∙ 10^–2) 2.2 ∙ 10^6 2.2 ∙ 10^–5 8.8 &#...
Friday, April 15, 2016 by Anonymous

math
Jose was 62 years old nineteen years ago. how old is he now?
Friday, April 15, 2016 by kaitlyn

math
Sister has 5 tops and 3 skirts. How many different ways can she dress?
Friday, April 15, 2016 by please explain how u work it out using tree diagra

Math
Which function models the number of mold spores on the bread after x days?
Friday, April 15, 2016 by Samantha

math
A 12-foot flagpole casts a nine-foot shadow. What is the measure from the top of the shadow to the top of the flag pole? 15 21 3 6
Friday, April 15, 2016 by trent

Percent error math
Julian's measurement was 105 percent of 50 pounds and Amanda's measurement was 95 percent of 50 pounds. How many pound off were each? Do they have the same percent error? I got 5 percent error for both even though Amanda was -5
Friday, April 15, 2016 by Robin

Math (Mrs. Sue, please help?)
Describe how you can make the line of best fit. Write the approximate slope and y-intercept of the line of best fit. Show your work. So, I know how to make a line of best fit-- how do I write the y-intercept or slope of it, though? Please, please help. The coordinate (tell me ...
Friday, April 15, 2016 by Reb

Math grade 7
The city treasury began with $1,100,000 at the beginning of the year. Each day since tax revenues have come in at a rate of 12,500 per day. Expenditures each day average 15,000 per day. The treasury now has less than1,000,000. How many days d has it been since the beginning of...
Friday, April 15, 2016 by Robin

Math
A particle moves along a straight line with a velocity, v ms/s, given by v = 4 - 8 sin 2t where t is the time in seconds after passing a fixed point O. 1. Determine the range of values of v.
Friday, April 15, 2016 by Johnson

Reverse math confused
Romita gets the sushi lunch special at Yoshi's. By using a coupon she receives $2.00 off the regular price p. Her total cost including 20 percent for tax and tip is $9.00. What is p the regular price of the lunch special?
Friday, April 15, 2016 by Lissette

Math Trig
use a double-angle formula to find the exact value of cos2u when sinu=5/13 , where pi/2<u<pi So far I went cos2u=1-sin^2 =1-2(25/169) =1-(50/169)
Thursday, April 14, 2016 by Larry

Math
A student cuts 1/3 of a coil of wire. He then cuts out another piece that was 8 meters long (I assume from the remaining coil). The two pieces of cut off wire are only half the total length of the wire. How long was the coil before the student cut it? I am getting 25, 50, to ...
Thursday, April 14, 2016 by Lulu

Math
Is this answer correct? What percent of .45 is .0015? the answer I got was 0.33%
Thursday, April 14, 2016 by Lea

Math
Genny babysits for two different families. One family paints her $6 an hour and a bonus of $20 at the end of the night. The other family pays her $3 every half hour and a bonus of $25 at the end of the night. Write and solve the system of equations that represent this ...
Thursday, April 14, 2016 by May

math
Martene got a small aquarium for her birthday. The aquarium is a right rectangular prism 18.5 cm long and 15cm wide.Martene put 3885 cm of water in the aquarium. How deep is the water in the aquarium?
Thursday, April 14, 2016 by rish

Math
Write the first trigonometric function in terms of the second for θ in the given quadrant. tan(θ), cos(θ); θ in Quadrant IV I believe to start this is 1/cos^2*theta. Am I write? If not, can you please help me?!
Thursday, April 14, 2016 by Jennifer

math
How do i find the radius of s circle with the circumference of 272.2 inches? can anyone help
Thursday, April 14, 2016 by Kailey

math
ty needs to cut strips of wrapping paper that are 9 inches wide. if ty has 2 rolls of wrapping paper that are each 15 feet long,how many 9 inch strips can he cut?
Thursday, April 14, 2016 by carson

math
Rewrite this formula using rational exponents. t = 2 pi sqrt 4/32 Thanks!!!
Thursday, April 14, 2016 by Jason

Math
An explorer descends to the deepest part of a cave. Then she ascends 25 feet per minute. After 3 minutes, she is at -195 feet. What is the depth of the cave?
Thursday, April 14, 2016 by A

Math
At the grocery store Mr and Mrs Bailey bought 24 apples and 18 pears. Write a ratio in simplest form to compare apples to pears
Thursday, April 14, 2016 by Melanie

Math
A farmer has 36 feet of fence to build a pigpen. He is going to use one of the sides of his barn as a side to the rectangular enclosure. Determine a function A that represents the total area of the enclosed region. What is the maximum area that can be enclosed?
Thursday, April 14, 2016 by Kate

math
to get ready for her 1 semester of school, brie spent a total of 7.92 dollars for eight identical notebooks. what was the cost of each notebook?
Thursday, April 14, 2016 by sckid30

math
in a school gym , 588 students were seated for an assembly in 21 equal rows. what number of students were stated in each row?
Thursday, April 14, 2016 by sckid30

Math
If the length of a rectangle is X and it's width is (X + 5) how does one determine it's area?
Thursday, April 14, 2016 by Greg Kuebler

Math
Okay, Nicole has tiles that are the same size and shape. *The probability of selecting a red tile is 25% and, *The probability of selecting a green tile is 40%. What is the probability that Nicole will randomly select a tile that is green, replace it, and then select a tile ...
Thursday, April 14, 2016 by Mindy

math
vernon spent $229.06 for groceries , and paid for his purchase five 50.00 bills. what amount of change should he have received
Thursday, April 14, 2016 by sckid30

math
Ricky's Pizza Parlor has three different sizes of pizza: a large (15 in. round), a medium (13 in round), and a small (10 in. round). A single-topping large pizza sells for $18. A single-topic medium pizza sells for $15 and a single-topping small pizza sells for $12. Which ...
Thursday, April 14, 2016 by Anonymous

math
X1, X2,...,X9 are nine points on the circumference of circle O. Line segments are drawn connecting each pair of points. What is the largest number of different points inside the circle at which at least two of these line segments intersect? (Remember that the points are not ...
Thursday, April 14, 2016 by AWESOMMEEE

math
7/8 of a pizza that have 12 slices how many left
Thursday, April 14, 2016 by carla

math
what dose this mean when you divide a decimal number by a whole number your estimate is 3.4 identify 3 possible pairs of numbers you might have been dividing ?
Thursday, April 14, 2016 by anonymous

math
Find p such that px^2-12x+4=0 has only one solution. Thank you!!!
Thursday, April 14, 2016 by Jane

Math - Please check!
1. Find the circumference of a circle with a diameter of 11 cm to the nearest hundredth. Measurement formula C = pi x diameter a. 34.54 cm *** b. 17.27 cm c. 5.5 cm d. 33 cm 2. Which of the following is an irrational number? a. square root 144 b. 0.25 c. square root 17 *** d. ...
Thursday, April 14, 2016 by Carlos

Math
1. The lengths of the three sides of a triangle are given. Classify each triangle as acute, right, or obtuse. NUMBERS: 30, 40, 50. I'm confused by this question, could someone help/explain what it is asking.
Thursday, April 14, 2016 by Tim

Math
an airplane is flying with an airspeed of 145 mph and a heading of 84.5 degrees. q wind of 24.6 omh is blowing at a heading of 68.4 degrees. find the ground speed and course of airplane
Thursday, April 14, 2016 by Ibrahim

math
What is the area of a rectangle with a width of (1)/(3) yd and a length of (9)/(10) yd
Thursday, April 14, 2016 by Bub

Math
One alloy is 2 parts iron to 3 parts silver and another alloy is 7 parts iron to 3 parts silver. How much of each should be combined to produce a 30 pound alloy that is 1 part iron to 1 part silver?Please show me how to do this
Thursday, April 14, 2016 by Bob

Math
Name the lengths of the sides of three rectangles with perimeters of 12 units. use only whole numbers
Thursday, April 14, 2016 by Mimi

math
What is the minimum value of the expression 2x^2+3y^2+8x-24y+62 for real x and y?
Thursday, April 14, 2016 by Lola

Math
Mary has 2/3 cup of chocolate chips. A cookie recipe calls for 1/2 cup of chocolate chips per batch. How many batches can bury make using all of her chocolate chips? Show your work and
Thursday, April 14, 2016 by Anonymous

Math
There are 10 purple, 5 yellow, 2 green, and 3 red jelly beans in a bowl. Write a sentence that explains how likely it is for a purple, red, or yellow to be chosen in one pick.
Thursday, April 14, 2016 by Camron

Math
The drama club is trying to raise $1428. On the first day they sell 12 tickets. They sell 4 more each day. Each ticket costs $3.50. Than how long is it going to take them to get to their goal?
Thursday, April 14, 2016 by Areej

Math - Help!
Which number is an irrational number? a. 0.12 b. 0.1257486… *** c. 0.12121212… d. 0.111111…
Thursday, April 14, 2016 by Carlos

Math
What is the domain of the function below? f(x) = (x + 4)^2 - 4 A. (-infinity sign, -4] B. [-4, infinity sign) C. [0, infinity sign) D. (-infinity sign, infinity sign) I believe the answer is either A or B, can someone please help me?
Thursday, April 14, 2016 by xxAnonymousxx

Math
Richard shot a homemade rocket from a field behind is house. The height of the rocket, in feet, t seconds after it left the ground is shown in the function below. r(t) = -30t + 390t What is the domain of the height function? A. (-infinity sign, infinity sign) B. (0,13) C. (0, ...
Thursday, April 14, 2016 by xxAnonymousxx

Math
A mixture of peanuts and walnuts sells for $3 per pound. How many pounds of peanuts at $1.50 per pound should be mixed with 12 pounds of walnuts at $4 per pound
Thursday, April 14, 2016 by Ty

math
A bucket holds somewhere between 100 and150 liters of water. If we fill as many as 3 liters containers we will be left with 1 liter of water, similarly is the case with 4 liters container and 5 liters container then what is the capacity of bucket
Thursday, April 14, 2016 by piyush

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