Friday
May 29, 2015

Homework Help: Math

Branches of Math

Recent Math Questions

math
the perimeter of a paved area being built at a playground it's going to be 46 meters is the land and went are each a whole number of meters what should the length and width of the area be to cover the greatest possible area draw a picture and make an organized list to solve
Wednesday, March 18, 2015 at 2:42pm

MATH
How do I write one equations in slope-intercept form, and three other lines in slope-intercept form that are perpendicular to the first line ?? for ex. If I pick the equation y=2/3x+4 for the first equation. and for the second line , the slope -2/3x +4 , how about the 3rd and ...
Wednesday, March 18, 2015 at 2:08pm

math
This is a continuous from my last question Let g be a function that is defined for all x, x ≠ 2, such that g(3) = 4 and the derivative of g is g′(x)=(x^2–16)/(x−2) with x ≠ 2. On what intervals is the graph of g concave down? Justify your answer. ...
Wednesday, March 18, 2015 at 2:06pm

math
How do you solve? what is the area if it is 32. times smaller that 3003.014cm?
Wednesday, March 18, 2015 at 1:45pm

math
Mary invested $3,750 for 42 months at a simple interest rate of 3.85%. How much interest did she earn?
Wednesday, March 18, 2015 at 1:31pm

math
Berkley has 10 pieces of ribbon that are 2 yards each. She uses 8 pieces that are 3 feet long. How many feet of ribbon does Berkley have?
Wednesday, March 18, 2015 at 12:13pm

Math
Jane collected 53 dollar notes for the competition of which x are $2 notes and y is $10 notes. The total value of the dollar notes is $394. Form 2 equations in terms of x and y. Solve the equations and hence find the number of $2 notes
Wednesday, March 18, 2015 at 11:19am

Math
A painter bought some paint for $500. He paid $x for each litre of paint. He accidentally spilt 5 liters of paint and sold the remainder of the psint for $2/litre more than he paid for it. If he made a profit of $40, find the amount he paid for each litre of paint.
Wednesday, March 18, 2015 at 11:16am

Math
3x^2+5xy-2y^2=0, where y is not the same as 0. Find the possible values of x/y
Wednesday, March 18, 2015 at 11:13am

math
what is set-up for three dollars less than half of $128. ?
Wednesday, March 18, 2015 at 10:42am

EDUC2120
Treena is a personable student in Mr. Jordan’s math class. Mr. Jordan can see that Treena is popular with her peers. He regularly sees her conversing animatedly with her friends in the cafeteria and before and after school. She does well in class also. Her homework is ...
Wednesday, March 18, 2015 at 10:25am

math
25 % of a class of 40 students are girls. When some new girls joined the class, the percentage of girls increased to 40 %. How many new girls are joined the class
Wednesday, March 18, 2015 at 10:05am

Math
Find the future value of an ordinary annuity that calls for depositing $100 at the end of every 6 months for 15 years into an account that earns 7% interest compounded semiannually. (Round your answer to the nearest cent.)
Wednesday, March 18, 2015 at 9:42am

Math
The concentration (in milligrams per liter) of an antibiotic in the blood is given by the geometric series A + Aekt + Ae2kt + + Ae(n − 1)kt where A is the number of milligrams in one dose of the antibiotic, n is the number of doses, t is the time between doses, and k is ...
Wednesday, March 18, 2015 at 9:32am

math
Limx-0 sinx/tanx+tanx.sinx
Wednesday, March 18, 2015 at 8:41am

Math
An agent receives a monthly salary of 1500 plus a 4% commission on every home sold what amount of monthly sales will he earn at least 5000
Wednesday, March 18, 2015 at 7:53am

Math - 7th grade (repost)
Can someone please help? I'm given a box and whisker plot that represents the cost, in dollars, of 12 CDs. How can I determine how many CD's cost between $14.60 (Q1 value) and $26 (Q3 value) and how many CD's cost less than $14.60?
Wednesday, March 18, 2015 at 7:08am

Math
Solve the simultaneous equation 1/p minus 1/q = 3/2 1/p plus 1/q = 4
Wednesday, March 18, 2015 at 6:36am

Math
y is directly proportional to the cube of x. If x is increased by 50% show that the percentage increase in y is 237.5%
Wednesday, March 18, 2015 at 6:30am

math
a person's heart may beat at 75 beats per minute. how many beats would that translate into a day?
Wednesday, March 18, 2015 at 5:03am

Math
Show that log base b [(x + (sqrt x^2-5))/5] is equal to -log base b (x-(sqrt x^2-5))
Wednesday, March 18, 2015 at 4:08am

Math
If m ≥ n > 1, what is the largest possible value of log base m (m/n) + log base n (n/m)?
Wednesday, March 18, 2015 at 4:07am

math
Limx-0 sinx/tanxsecx+tanx.sinx
Wednesday, March 18, 2015 at 2:02am

math
Let f(x) = −3x + 5. For what value of x does function f have the given value? f(x) = −1
Wednesday, March 18, 2015 at 1:34am

math
Suppose you borrowed $15000 to buy a car at an interest rate 7.2% compounded monthly. What will the monthly payments be on loans of 36, 48 and 60 months if you do not have to put any money down on the financing?
Wednesday, March 18, 2015 at 1:09am

math
Aisha invests twice the amount invested the previous month. If she invested $26.25 during the 1st month, how much did she invest during the 6th month?
Wednesday, March 18, 2015 at 12:49am

math
Evaluate using L'Hopital Rule? lim as x approaches x from left (1-x)^(3/x)
Wednesday, March 18, 2015 at 12:14am

math
in a spin circle are numbers 10, 2, 4,6, 2, 8, what is the probability of spinning a 2 at first spin.
Wednesday, March 18, 2015 at 12:06am

math.
y=2/5x+c, determine the value of c if the line passes through the point P(-2,-4). answer: c=-16/5 ?
Tuesday, March 17, 2015 at 11:42pm

Math - 7th grade
I'm given a box and whisker plot that represents the cost, in dollars, of 12 CDs. How can I determine how many CD's cost between $14.60 (Q1 value) and $26 (Q3 value) and how many CD's cost less than $14.60?
Tuesday, March 17, 2015 at 11:36pm

Math
order of operation (100-7 x 2+3) /10
Tuesday, March 17, 2015 at 11:25pm

Math
Theo made the table below to show the number of middle school students who attended the last football game. If the data were displayed in a circle graph, how many degrees would be in the sector representing the eigth graders? Grade 6 Number of students in attendance 375. Grade...
Tuesday, March 17, 2015 at 11:10pm

Math
The circle graph shows data on the suitability of land for farming. Which three categories together account for exactly half of the land? The percetage for Too Shallow is 13% The percentage for Chemical Problems is 25% The percentage for Too Dry is 30% The percentage for ...
Tuesday, March 17, 2015 at 11:02pm

Math
Explain how you could write 35% as the sum of two benchmark prevents or as a multiple of a percent.
Tuesday, March 17, 2015 at 10:50pm

math
Kibet left school by bicycle at 8:00 a.m. and took 1 ½ hours to reach the market 20 km away. Akinyi left the school for the market by car at 8:30 a.m. The average speed of the car was 80 km /h. What was the difference between their arrival times?
Tuesday, March 17, 2015 at 10:45pm

Math
Grade 7 students were surveyed to determine how many hours per day they spent on various activities. The results are shown in the circle graph below. About how many hours per day altogether were spent on watching TV and homework? The percentage for watching TV is 13% The ...
Tuesday, March 17, 2015 at 10:44pm

Math
a basketball tournament starts with 64 teams. after one loss the team is out. how many games does the team that wins the tournament have to play? 64/2=32 32/2=16 16/2=8 8/2=4 4/2=2 2/2=1 The answer is 6 games. How would I write the number sentence?
Tuesday, March 17, 2015 at 10:19pm

math
3y-6=20
Tuesday, March 17, 2015 at 10:12pm

Math
Plane A leaves the airport. One hour later, Plane B leaves the same airport on the same course. It catches up to Plane A in 2.5 hours. The average speed of Plane B is 300km/h faster than Plane A. Find the speed of each plane.
Tuesday, March 17, 2015 at 10:12pm

Math
The cash in the school canteen contains x quarters and (30-x) dimes. If the total value of the coins is $5.85, how many of each kind of coins are there?
Tuesday, March 17, 2015 at 10:06pm

math
Evaluate this expression: (30-5) + (-7) this what I did (25) + (-7) is 18.
Tuesday, March 17, 2015 at 9:52pm

math
Nolan practices the piano for 1 2/5 hours every Saturday and Sunday. How long does he practice each weekend? Express your answer in hours and minutes.
Tuesday, March 17, 2015 at 9:37pm

math
An 18 ounce box of cereal sells for $2.88. What is the unit cost of the cereal?
Tuesday, March 17, 2015 at 9:33pm

math
Christina Dwyer is searching for a new job. She lives in Shreveport, Louisiana, and has interviews in Barrow, Alaska; Tucson, Arizona; and Rochester, New York. The cost of one-way flights between these four cities is as follows: Shreveport to Barrow costs $855, Shreveport to ...
Tuesday, March 17, 2015 at 9:24pm

Math
An object is launched at 9.8 meters per second from a 73.5-meter tall platform. The object's height s (in meters) after t seconds is given by the equation s(t)= -4.9t(-4.9t) - 9.8t = 73.5. When does the object strike the ground? I literally have no idea where to start
Tuesday, March 17, 2015 at 8:44pm

math
Eric and Frank want to equally share 4/3 feet of rope. What length of rope should each friend get? Explain how to use a drawing to help solve the problem.
Tuesday, March 17, 2015 at 8:19pm

Math
How do you write 4/9 as a decimal? Thanks for the help.
Tuesday, March 17, 2015 at 8:00pm

math
The low temperature in one city was -4 degrees F. The low temperature in another city was 8 degrees F. Write an inequality to compare the temperature. HELP!
Tuesday, March 17, 2015 at 7:57pm

math
The area of a square plot of land is 1156m2. The plot is to be fenced with three strands of wire. What is the length of the wire that is needed? Area = S2 √1156 = S S=34 P = 4s = 136 = 136(3) = 408
Tuesday, March 17, 2015 at 7:52pm

Math
Q. On Friday night 2,950 people attended the rodeo, and 3,159 people attended Saturday night, if the stadium seats 4,000 people, how many seats were there for the two nights? - A. So do I subtract 3,159 - 4,000 = 951 & add 951 + 3,159 ?
Tuesday, March 17, 2015 at 7:50pm

math
A tank contained 22.5m^3 of water. More water was poured into the tank at the rate of 1.45m^3 per minutes. The tank was full at the end of 30 minutes. What is the capacity of the tank in tank? =22.5 + 1.45(30) =22.5 +43.5 = 66 = 66 * 1000 = 66000 liters
Tuesday, March 17, 2015 at 7:48pm

math
David and John shared some money in the ratio 5:2 John received $30 less than David. How much money did John get?
Tuesday, March 17, 2015 at 7:40pm

math
Kool Klothes has determined that the revenue function for selling x thousand pairs of shorts is R(x) =-5x^2 + 21x. The cost function C(x) = 2x + 10 is the cost of producing the shorts. How many pairs of shorts must the company sell in order to break even
Tuesday, March 17, 2015 at 7:39pm

Math
A rectangular park has an area of 2_3 square mile. The length of the park is 22_3 the width of the park. What is the width of the park? this is the example of how they want them solving it The width of the room is 5/6 the length of the room. What are the dimensions of Kamal&#...
Tuesday, March 17, 2015 at 7:38pm

Math
How can you tell which fractions represent a umber that is less than 1% without doing any computation? .02/5, .2/5, 2/5, 2/50, 2/500. I know the numbers less than 1% are .02/5 and 2/500, but how do you know without doing the computation
Tuesday, March 17, 2015 at 7:01pm

math
For questions 4–5, use the following two ways to display the test scores recieved on Mr. Alexander's math test. Use these displays to solve each problem. Stem | Leaf 6 | 8 9 7 | 0 3 5 8 9 8 | 1 2 2 5 7 8 8 9 9 | 0 2 3 Pie Chart: 80-89= 44.4% 90-99=16.6% 70-79=27.7% 60...
Tuesday, March 17, 2015 at 6:46pm

Math, HELP PLEASE!
is the sequence 2,3,5,8,12 geometric? please explain why
Tuesday, March 17, 2015 at 6:21pm

C. MATH
I have tried and tried to get the answer but am still confused; please help, thank you... The “Limited Plan” offers a 15% discount for power usage between 7pm – 9am if most of your usage happens during that time. If not, then you lose your discount and you pay a...
Tuesday, March 17, 2015 at 6:14pm

math
Q1.Two dozen eggs and a loaf of bread cost K4.82.Half a dozen eggs and two loaves of bread cost K2.29.What is the cost of a loaf of bread?
Tuesday, March 17, 2015 at 6:14pm

math
Q1.Two dozen eggs and a loaf of bread cost K4.82.Half a dozen eggs and two loaves of bread cost K2.29.Find the cost of a loaf of bread.
Tuesday, March 17, 2015 at 6:05pm

Math (ASAP)
Solve the following inequalities. 1.) 3x + 2y < 6 2.) 2x^2 + y ≥ 2
Tuesday, March 17, 2015 at 5:56pm

math
How many square yards of carpeting are needed to cover the floor of a rectangular room that is 21 ft. long and 12 ft. wide?
Tuesday, March 17, 2015 at 5:39pm

Math
The opposite sides of a square, a rectangle, a parallelogram, and a rhombus are what type of triangle?
Tuesday, March 17, 2015 at 5:23pm

math
275l=ml
Tuesday, March 17, 2015 at 5:21pm

math
a rectangle with a length of 60mm and a perimeter of 200mm
Tuesday, March 17, 2015 at 5:17pm

Math
How can you tell which fractions represent a number that is less than 1% without doing any computation? 0.02/5, 0.2/5, 2/5, 2/50, 2/500
Tuesday, March 17, 2015 at 4:58pm

math
A woman spent 2/5 of her money. She lost 2/3 of the remaining and then she had $8 left. With how much money did she start?
Tuesday, March 17, 2015 at 4:57pm

Math
A box of greeting cards contains 7 graduation cards, 4 thank you, 3 blank cards. What is the ratio of blank cards to thank you cards?
Tuesday, March 17, 2015 at 4:03pm

Math
Directions: Solve the following system of inequalities. 1.) 3x + 2y < 6 x > 0 y > 0 2.) 2x^2 + y ≥ 2 x ≤ 2 y ≤ 1
Tuesday, March 17, 2015 at 4:00pm

math
Today 4% of employees vat Super Toys were absent,how many employees are there in all?
Tuesday, March 17, 2015 at 3:55pm

Math Help Me Please
4 Determine which ordered pair is not a solution of y= -5x – 4 A (10, -52) B (7, -39) C (-7, 31) D (8, -44) I don't know how to solve it?
Tuesday, March 17, 2015 at 3:42pm

Math
The “Limited Plan” offers a 15% discount for power usage between 7pm – 9am if most of your usage happens during that time. If not, then you lose your discount and you pay a 20% premium on the usage outside of that time. The cost per kilowatt hour is $0.05432. ...
Tuesday, March 17, 2015 at 3:06pm

Math Quick Help Please
Which of the following types of information is not suited for display on a double bar graph? populations of boys and girls at three different schools number of records versus compact discs sold each week during a one ­month period at The Music Den the weekly interest rate...
Tuesday, March 17, 2015 at 2:12pm

math
An open cylindrical tank has an internal diameter of 5.6 cm and an internal height of 4 cm. The inside of the tank was painted. What area of the tank in square centimeter, was painted?
Tuesday, March 17, 2015 at 1:59pm

math - slope-intercept
How do I write one equations in slope-intercept form, and three other lines in slope-intercept form that are perpendicular to the first line ?? for ex. If I pick the equation y=2/3x+4 for the first equation. and for the second line , the slope -2/3x +4 , how about the 3rd and ...
Tuesday, March 17, 2015 at 1:58pm

math
Kibet left school by bicycle at 8:00 a.m. and took 1 ½ hours to reach the market 20 km away. Akinyi left the school for the market by car at 8:30 a.m. The average speed of the car was 80 km /h. What was the difference between their arrival times?
Tuesday, March 17, 2015 at 1:57pm

Math!! Help ASAP
6. Which is the best measure of central tendency for the type of data below- the mean, the median, or the mode? Explain. Hours of sleep at night A. Median; there will be outliers B. Range; there are no outliers C. Mode; the data are non-numeric D. Mean; the outliers are ...
Tuesday, March 17, 2015 at 10:59am

Math!! Help ASAP
3. The Step-And-Leaf Plot below could NOT represent which of the following? 1 | 1 2 2 7 7 2 | 1 4 4 7 3 | 3 5 6 8 9 Ket: 3 | 5 means 3.5 A. The average number inches rain in june B. The height of plant seedlings, in inches C. The weight of phonebooks, in pounds d. The height ...
Tuesday, March 17, 2015 at 10:53am

math
a sphere of radius 3m is circumscribed about a regular triangular prism. if the base edge of the prism is 2m, find the volume of the prism
Tuesday, March 17, 2015 at 8:57am

math
Draw a picture that represents 3x50=150?
Tuesday, March 17, 2015 at 7:45am

Math
a simple Model (model 1)of distance,d meters,fallen in time t seconds by free-fall skydiver is d(t)=4.9t^2 a. sketch the model b. a different model (model 2) for the distance travelled by a skydiver is d(t)=4.9t^2-0.1t^2.sketch a graph of this function
Tuesday, March 17, 2015 at 5:43am

math
In a class, 3/4 of the pupils wore spectacles.1/3 of the pupils who did not wear spectacles were boys.What fraction of all the pupils were boys who did not wear spectacles?
Tuesday, March 17, 2015 at 3:38am

math
Ridwan work in a factory packing computers. He packed 1/3 of all the computers in the morning. 1/2 of the computers he packed were shipped out immediately after packing. What fraction of all computers in the factory was shipped out after packing?
Tuesday, March 17, 2015 at 2:10am

math
A bus left the bus station with 90% of the seats full. After six stops, a total of 26 passengers got of the bus and 4 passengers boarded the bus. Now, 35% of the seats are full, How many seats are there on the bus ? 35%*2= 70%= 2*22=44 seats.
Tuesday, March 17, 2015 at 1:25am

math
Find the point P on the curve y2 = 4ax which is nearest to the point (11a, 0).
Tuesday, March 17, 2015 at 1:05am

math
Find the unit vector perpendicular to the plane ABC where the position vectors of A, B and C are 2 ^i – ^j + ^ k , ^i + ^j + 2 ^ k and 2 ^i + 3 ^ k respectively.
Tuesday, March 17, 2015 at 1:03am

math
Shelby walks at a constant rate. the equation that represents this relationship is d=4t, where d is the distance in miles and t is the time in hours. What does the constant 4 tell you about shelby? Make use of structure. What question is answered by the equation d=4(32)?
Tuesday, March 17, 2015 at 12:58am

Math
A bag contains 22 1\2 cups of flour. A recipe for pancakes uses 1 1/4 cups of flour. How many batches of pancakes can be made with one bag of flour?
Tuesday, March 17, 2015 at 12:01am

Math
In this document... berkleyschools . org/NorthstarMedia/download/123084?token​=OCaRojCyVwc%3D Is A the correct answer to question 70?
Monday, March 16, 2015 at 11:37pm

math
Let g be a function that is defined for all x, x ≠ 2, such that g(3) = 4 and the derivative of g is g′(x)=(x^2–16)/(x−2) with x ≠ 2. Find all values of x where the graph of g has a critical value. For each critical value, state whether the graph of...
Monday, March 16, 2015 at 10:49pm

Math
Let AB be taken as unity, and let it be required to multiply BD by BC. I have only to join the points A and C, and draw DE parallel to CA; then BE is the product of BD and BC. Show that the length of BE is the product of the lengths BD and BC.
Monday, March 16, 2015 at 9:33pm

Math
John has 4 cups filled with fruit juice.He said that he has a gallon of fruit juice.Is his statements reasonable?explain why or why not.
Monday, March 16, 2015 at 9:19pm

MATH
DRIVING DOWN A 10% GRADE, THEN YOU DESCEND TO 20 FEET BELOW YOUR STARTING POINT. wHAT CONCEPT DOES THE GRADE RELATE TO?
Monday, March 16, 2015 at 9:05pm

math
8 friends attend a read a thon. They take turns reading aloud for a total of 3 hours. If each friend reads for the same amount of time, what fraction of each hour does each friend spend reading?
Monday, March 16, 2015 at 8:57pm

math
How do I write one equations in slope-intercept form, and three other lines in slope-intercept form that are perpendicular to the first line ?? -- one line: y=mx+b second line perpendicular y= -x/m + c of course, you have to know m, b, c. ----- for the second line ...
Monday, March 16, 2015 at 8:51pm

Math
The following circle graph was published in the Cane Country annual report. If there are 1,000 registered voters in Cane Country, how many 35-45 years old? On the graph 35-45 years old is graph at 30%. A. 150 voters B. 250 voters C. 300 voters D. 350 voters Is the answer C? ...
Monday, March 16, 2015 at 8:29pm

math
You receive a salary of $400 each week plus 12.5% commission on all sales. In on week you sold $2300 worth of merchandise. What is your total earnings for that week.
Monday, March 16, 2015 at 8:20pm

Math
Samuel, Thea, Ling, Jose, and Mark all want to go on the trip. How many different combinations are possible for the remaining 4 spots?
Monday, March 16, 2015 at 8:08pm

Math Problem
Mrs. Bond made a deposit of $100 into her checking account. Then she wrote checks for $97.54 and $48.27. If her previous balance was $320.39, what is her new balance? - I also need help with Mika bought two copies of the same book and a tape priced at $11.95. She gave the ...
Monday, March 16, 2015 at 8:02pm

Math
Q. The rondo stared 7 minutes late. It was scheduled to last 3 hours. But it ran 22 minutes longer. If the rodeo ended at 9:59 p.m, at what time did it begin? - A. So, do I mulpite 7 by 3 = 21, than muplite that answer by 22. than divide that by 9:59 p.m?
Monday, March 16, 2015 at 7:59pm

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