Sunday
December 4, 2016

Homework Help: Math

Branches of Math

Recent Math Questions

Finite Math
You deposit $5,000 in an account earning 7.5% interest compounded semiannually. How much will you have in the account after 9 years? (Note: Use n=12 for monthly compounding, n=4 for quarterly compounding, n=2 for semiannual compounding, and n=1 for annual compounding.)
Thursday, December 1, 2016 by LaDaniel

Math
Two sizes of concrete blocks are being used to build a raised garden bed for strawberries the first kind of block is 8 inches long and the second is 12 inches long a row of the shorter block is laid on the top of row of the longer blocks using only whole blocks what is the ...
Thursday, December 1, 2016 by Jenny

Math
An empty bathtub is filled with water at a of 2.5 liters per minute.How long will it take to fill the bathtub with 30 liters of water?
Thursday, December 1, 2016 by Zyhakia

Math
Two sizes of packing boxes are being stacked next to each other in a warehouse one type of the box is 12 inches high and the other is 16 inches high the heights of the stacks are to be equal what is the shortest possible height of a stack?
Thursday, December 1, 2016 by Jenny

Math/ Statistics
A group of data elements has a mean M and a standard deviation S. a) Find the new mean and the new standard deviation if a constant number C is added to each data element in the group? Explain thoroughly. b) Find the new mean and the new standard deviation if each data element...
Thursday, December 1, 2016 by Abigail

steve plz help me on my math
Find the perimeter of a rectangular area with a length of 13 inches and a width of 7 inches using distributive property and not using it.
Thursday, December 1, 2016 by Lucy

math algebra
A tax free municipal bond pays 4.75% compounded continuously. What is the value of a $2,000 bond after 30 years? Round your answer to the nearest cent. [Hint- A=P e^rt where P= present(initial) value, A= future value, r= annual rate, and t= number of years] P.S.The rt is an ...
Thursday, December 1, 2016 by caroline

math
The radioactive decay of a substance is expressed by A=A^0 e^ -kt, where the initial amount A^0, decays to an amount A after t years. The positive constant k differs for each substance. Strontium 90 decays such that k=.028. Find out how much of 1,000 mg of strontium 90 remains...
Thursday, December 1, 2016 by sara

Math
In math class, a student has an average grade of 85% for five tests so far. What grade must that student earn on the next test to reach an average grade of 90% for all six tests?
Thursday, December 1, 2016 by Sophia

math algebra
The amount A, of 70 grams of a certain radioactive material remaining after t years can be found by the equation A=70(0.62)^t. When will 10 grams remain?
Thursday, December 1, 2016 by laura

math
Find the perimeter of a rectangular area with a length of 13 inches and a width of 7 inches using distributive property and not using it.
Thursday, December 1, 2016 by ginger

Math adding fractions with distributive property
how do you do this problem using distributive property and not using it: 6(1/2+2/3+3/4)
Thursday, December 1, 2016 by ginger

Math
The weights of all one hundred (100) 9th graders at a school are measured, and it is found that the mean of all the measurements is 100 lbs., with a standard deviation of 15 lbs.   Explain how you would use this information to determine the percentage of students who...
Thursday, December 1, 2016 by Shannon

math
in a right triangle b =1 c= square root 20 what is a
Thursday, December 1, 2016 by does this

Math
quilt squares are cut on the diagonal to form triangle quilt pieces. the hypotenuse of the resulting triangles are 10 inches long, What is the side length of each piece?
Thursday, December 1, 2016 by PLEASE HELP!! URGENT

Math
On level ground, a 60-foot-tall vertical building casts a 10-foot shadow. at the same time, another vertical building casts a 25-foot shadow. how many feet tall is the second building?
Thursday, December 1, 2016 by Ray

Math
3/5 of the animals on the farm are cows. The rest are chickens. There are 18 cows. How many are chickens?
Thursday, December 1, 2016 by Peters

Math
The area of a rectangular photo is 35 square inches. If the width of the photo is 5 inches, how tall is the photo?
Thursday, December 1, 2016 by Logan

Math
I am less than 100 and greater than 90. If you add the digits, the sum is 17. What number am I?
Thursday, December 1, 2016 by Anonymous

Are All Right? Math
Use cross products to see if each pair of ratios forms a proportion. Replace each box with = or ?. 1. 7/5 ? 15/10 = ? <--- 2. 6/8 ? 15/20 = <--- ? Solve each problem. 3. 2/3 = 12/x x = 18 <--- x = 12 x = 36 x = 8 4. 6/11 = 84/x x = 40 x = 120 x = 254 x = 154 <--- 5...
Thursday, December 1, 2016 by Kelly

math
how man 3/7 cup sugar bowls can be filled from 6 cups of? sugar?
Thursday, December 1, 2016 by chyna

MATH
If the volume of a cylindrical block is equal to 800cm^3 prove that the total surface area is equal to 2(pi)x^2 + (1600)/x, where x cm is the radius of the base. hence obtain the value x which makes the surface area a minimum
Thursday, December 1, 2016 by Grace

Math
Find the unit rate. Round to the nearest tenth, if necessary. 344 miles in 11 hours 344 3,784 0.03 31.27 ** Find the unit rate. In 10 months, 62.6 gallons were used. 0.16 10 6.26 ** 626
Thursday, December 1, 2016 by Kelly

Astronomy, Math, Science
If the Sun is at 57 degrees altitude at 12:18 pm on Sept. 1, 2016 and I held a pen that is 7 inches long in the sky, how long would its shadow be?
Thursday, December 1, 2016 by Charlotte

Math
A block of mass 20kg rests on a smooth horizontal ground near to a fixed post, to which it is attached to a light, horizontal rod. The block is pulled away from the post by force PN inclined at 30 degrees to the horizontal. Find in terms of P, the tension of the rod and the ...
Thursday, December 1, 2016 by larry

Math
a particle, A of weight W, is suspended by two strings AB and AC. AB is inclined at 30 degrees to the vertical and AC at an angle theta to the vertical. The tensions in AB and AC are 40N and 60N respectively. Calculate the values of w and the angle.
Thursday, December 1, 2016 by Barry T

Math integer
what is the value of this integer expression: -2(3+-4+-8+7) I have to do it with distributive property and without and using distributive property I got 34 but I dont know if its correct and how to do the expression without distributive property help me.
Thursday, December 1, 2016 by ginger

math
Which department has the largest difference between the highest and lowest paid employee?
Thursday, December 1, 2016 by Anonymous

help with math
Which would represent proof of the Pythagorean Theorem? A. Right triangle with legs of 36 and 9, as well as the hypotenuse as 64. B. Right triangle with legs of 144 and 25, as well as the hypotenuse as 169. Is it B? I don't know...
Thursday, December 1, 2016 by manny

Math
The average score on a recent test was 75%. One of the students earned a grade of 93% while another student earned a grade of 78%. A total of 23 students took the test. Find the average grade of the remaining 21 students.
Thursday, December 1, 2016 by Emily

math
If the average of 4 numbers is 12, what is the sum of the 4 numbers?
Thursday, December 1, 2016 by Ron

Math
Mrs. Miller sells a house for $179,000. If she earns a commission of 6%, how much money does she earn? Write and proportion to show your work.
Thursday, December 1, 2016 by Sadie

Math check my answers
1. Evaluate. 8d - 10 for d = 4 A.32 B.22*** C.26 D.46 2. write an algebraic expression for the sum of 3 coins and c coins. A.c + 3*** B.c/3 C.3c D.c-3 3. Find the solution of the equation from the given numbers. x - 2 =16: 14, 18, 21, or 12 A.12 B.14 C.18*** D.21 4.use mental ...
Thursday, December 1, 2016 by Sid.V

Math
A cookie recipe calls for 2-3/4 cups of flour and 1-1/4 cups of sugar. If the amount of the ingredients are increased proportionally, and the amount of sugar is increased to 10 cups, how many cups of flour would be needed?
Thursday, December 1, 2016 by Angie

Math
Triangle ABC is reflected over the y-axis what are the coordinates of the reflected triangle describe in words what happens to the x coordinates and the y coordinates of the original triangle's vertices as a result of this reflection.
Thursday, December 1, 2016 by HELP!

math
A man is 20 years older than his son.if the sum of their ages is 50 years, find their ages ?
Thursday, December 1, 2016 by Lesiba

Math
The point C (x,y) is reflected over the x-axis. Write a translation rule to describe the original point and its reflection. (x,y) ---> (x,2y) (x,y) ---> (-x,y) (x,y) ---> (-x,-y) (x,y) ---> (x,-y)
Thursday, December 1, 2016 by HELP!

Math
Write a word problem in which the starting number is in hundreds and the answer is 4 tickets were left over.
Thursday, December 1, 2016 by May

Math
Which ordered pairs lie on the graph of the exponential function f(x)=128(0.5)^x ? Choose ALL correct answers. A. (0, 1) B. (1, 64) C. (3, 16) D. (8, 0.5) B and C? someone please help
Thursday, December 1, 2016 by Jay

Math
Ryan left. Gabby left 3 hrs later, she drove 42mph faste. In 2 hrs she caught up. What was Ryan speed
Thursday, December 1, 2016 by Anonymous

math
Item cost $6750 vat inclusive. If VAT was charged at 12.5% what was the cost of the item before VAT?
Thursday, December 1, 2016 by indira

Math
1 4 6 9...
Thursday, December 1, 2016 by Soroush

math
1. determine which order pair is a solution of y = -5x + 10 A. (-15,5) **** B. (2,0) C. ( -1 , -5 ) D. (3, 25 ) 2.on which of the following lines does the point ( 7,1 ) lie? A. y-5x = 4 B. y=x -10 C. y = -4x +3 *** D. y + -x +8 3.find the slope of the line through ( -9 , -10...
Thursday, December 1, 2016 by andrew

Business Math
You decided to join the partnership of august and april. August has a capital of 50,000 while april puts up a capital of 75,000. The three of you decided that your profit and loss ratio would be 1:2:3 for august,april and yourself, and you further agreed to make your ...
Thursday, December 1, 2016 by TRIS

Math
The sequence a(1), a(2), a(3),...,a(n-1), a(n) is such that a(r)= 7r-3. Show that 1/[?a(r) - ?a(r+1)] = k[?(7r-3) - ?(7r+4)]. The numbers/letters in brackets are subscript.
Thursday, December 1, 2016 by Jade

Math
In the triangle ABC, AC=2cm, AB=x cm and angle ABC=?/2 rad. 1. Given that angle BAC=? rad, and that ? is a sufficiently small angle, show that x? a + b?^2, where a and b are constants to be determined. 2. For this part, ? is not assumed to be a small angle. The point N lies on...
Thursday, December 1, 2016 by John

Math
At first the ratio of the number of boys to the number of girls in a Mathematics Club was I : 2 when 5 more boys joined the club , the ratio became 3 : 4 How many members were there in the club at first ?
Thursday, December 1, 2016 by !@#$%^&er

math
A girl found that her shadow was 4m long when the shadow of a flagpole was 12m long. If her height is 1.5m, what is the height of the flagpole?
Thursday, December 1, 2016 by Safin

math
Sin(20-30°)=?3÷2for0°<​0<180°
Thursday, December 1, 2016 by perminus

math
How long will it take an 8% simple interest rate for $850 to amount to $1000?
Thursday, December 1, 2016 by frank

math
Sarah bought 2 boxes of pencils. There were 58 pencils in each box. In the first box, 23 of the pencils were red, 18 were blue, and the rest were yellow.
Thursday, December 1, 2016 by jb

math
Quin has 28 state quarters collected. he wants to have a complete set of the 50 state quarters. How many more quarters does he need to collect?
Thursday, December 1, 2016 by mia

Math
Help me find p please. (X-3.15)^2=4p(y-219.7981936) Thanks!!!
Thursday, December 1, 2016 by Bobby

Math
12 friends share 8 sandwiches. How much does each child get. Answer is 2/3, but how is this shown in a number sentence?
Thursday, December 1, 2016 by Ivonne

Math
Can someone please help me find my maximum height. I have my distance which is 80ft and my angle of elevation is 70ft. PLEASE HELP ME!!
Thursday, December 1, 2016 by Patrick

math
it is a 3- digit odd number its hundreds digit is the greatest one digit odd number its ones digit is 2 less than the hundreds digit its tens digit is 1 more than the ones digit
Thursday, December 1, 2016 by shekhar

Math
If i rent a boat for 3.5 hours and the cost for 3 hours is 41 dollars and i split the cost with my friend how much will each person pay for the cost
Wednesday, November 30, 2016 by Jlast

math
ratio 1/3
Wednesday, November 30, 2016 by karla

Math
When a number is a multiple of 6,what are the possible values for the ones digit?
Wednesday, November 30, 2016 by Bryce

Math
Julio walks 3 1/2 miles in 1 1/4 hours
Wednesday, November 30, 2016 by Nicole Houston

Math Check
Which nonterminating decimal can be converted into a rational number? 0.818118111... 0.020304050... 0.010110111... 0.321321321... *** George has a square sandbox in the backyard. The sandbox has an area of 160 square feet. To the nearest foot, what is the length of one side of...
Wednesday, November 30, 2016 by Kimberly

Math: Creating a linear equation
Cooper claims he has already completed the job and is offered $141 as a one time payment. you have to write this as c = mt + b if c is the cost, m is the slope, t is the time(hours) and b is y-intercept!!! PLEASE HELP!
Wednesday, November 30, 2016 by Summer Johnson

Math
A car rental agency charges $44.12 per day plus mile for a certain type of car How much is the rental charge for a 3 days trip of 605 miles?
Wednesday, November 30, 2016 by Jenny

Math
A customer's bill for maintenance and repair at a service station showed 6 quarts of oil at $1.15 each an air filter at $3.75 an oil filter at $7.45 13 gallons of gasoline at $1.15 a gallon and 3 hours labor at $37.00 an hour What was the total bill?
Wednesday, November 30, 2016 by Jenny

math ( plane)
find the equation of the plane passes through the middle point of the join of the points (2,-3,1) and (4,5,-3) and is perpendicular to the line joning the points?
Wednesday, November 30, 2016 by help

Math
There are 12 more girls than boys in the class. 35 % of the class are boys. How many pupils are there in the class?
Wednesday, November 30, 2016 by Kay

Math: Creating a linear equation
Alex has been offered $50 to accept the job, plus, $13 per hour. Alex claims he will complete the job in 7 hours. How would you write this as a linear equation in the form of: c = mt + b if c is the cost and t is the time, m is the slope, and b is the y-intercept. Please help!!
Wednesday, November 30, 2016 by Avni Singh

Math
Joshua went on shopping spree. He bought a backpack,7 notebooks,4 games and a clock. The backpack cost $16.00, the notebooks cost $9.40 each the games cost $15 each and the clock cost $24.00. How much money did he spend?
Wednesday, November 30, 2016 by Jenny

Math
What is 105/2.1
Wednesday, November 30, 2016 by Jenny

math algebra
the product of two consecutive even numbers is 440. What is the sum of the numbers?
Wednesday, November 30, 2016 by laura

math
Complete the statement. Round to the nearest hundredth if necessary. 3 pt =? c
Wednesday, November 30, 2016 by Howard Yao

Math
How many bricks of size 20cm×10cm×5cm are required to Build the wall leaving 10%of the space for the cement work?
Wednesday, November 30, 2016 by Isha

Math
carlos can throw a ball 14 yards . His friend raul can throw 3/7 of that distance. Is rauls throw longer or shorter than 14 yards? Now find the exact length of Raul's throw.
Wednesday, November 30, 2016 by May

math
1/2 of a class play soccer, 1/4 of the team are girls, what fraction represents how many girls on the team
Wednesday, November 30, 2016 by Anonymous

Math
Elena has 15 more dimes than nickels. If she has $2.55, how many nickels does she have?
Wednesday, November 30, 2016 by Sam

Math -Calculus
Hi, I need help with the problem: "Use a definite integral to find the area of the region under the curve y=6-4x^2 and above the x-axis". I keep getting stuck at 6x-(4x^3/3). Thanks!!
Wednesday, November 30, 2016 by Gabby

math
Joan babysits for 6 dollars per hour.
Wednesday, November 30, 2016 by brandon

math
Water weighs about 8 pounds per gallon
Wednesday, November 30, 2016 by brandon

7th grade math
Lightning electronics charges $9.98 plus 0.75 per pound to ship electronic purchases. Write and solve an equation to find the weight in pounds of a dvd player for which the shipping charge is $18.23. I thin k it is 9.98 +.75p = 18.23 the answer being 11....thank you again
Wednesday, November 30, 2016 by one more please check my work

Math (Geometry)
Linerar Equations Hourly rate of $8.00 an hour for a guaranteed 40 hours
Wednesday, November 30, 2016 by Frank

Math
How do you find the missing number? 4/5 > 2/x
Wednesday, November 30, 2016 by Me

7th grade math
Allison earns a $40,000 base salary plus a commission equal to 15% of her total sales. What expression represents what she earns in total? I think it is : 40,000 + 0.15s thank you
Wednesday, November 30, 2016 by please check my work

Math 6A unit test
What is the value of the blank in this question? 6/5 divided by ______ = 6
Wednesday, November 30, 2016 by Abby

6th grade math
stephanie ran 1 lap in 6 minutes. At this rate how far would she run in 30 minutes?
Wednesday, November 30, 2016 by Kaye

Math - Aglebra One (Ratios)
my grandfather has a huge coin collection of silver dollars and 50-cent pieces. He promised to give one fourth if his collection to the first of his grandchildren who can figure put the total value of his coins. The only cares he will give are these: There are 133 more silver ...
Wednesday, November 30, 2016 by Christine

math
Mileys music has a sale on music cds. All music Cds are discounTed 15%. mariana's receipt indicates that she saved $3 on her cd purchase. What is the full price of her music cd before discount
Wednesday, November 30, 2016 by Taylor

Math
What does it mean for an equation to be balanced and why must you keep an equation in balance? Can someone explain in there own words please
Wednesday, November 30, 2016 by Sid.V

Math
0.23 decimal as a fraction.
Wednesday, November 30, 2016 by Mahlet

Math
A rectangular playground has an area of 2,996 square yards.if the width of the rectangle is 28,what is the length? Part#1 What is the area of the rectangle in square feet? Part#2
Wednesday, November 30, 2016 by Heaven

Math
B) Noralie used 22 Gallons of Gas to go 682 miles. 1)What are the two unit rates that she might compute? 2)Compute each unit rate and tell what it means. 3) Which way is the most useful? Why?
Wednesday, November 30, 2016 by Siren

Math
My younger sister needs help with this problem: You have an 8 inch stack of dimes, each dimes is a half inch, how many dimes are there? I know the answer is 17, but I need to help her show her work
Wednesday, November 30, 2016 by Palmer

Super Hard Math
What multiplication fact can be found by using the arrays 2 times 9 and 5 times 9
Wednesday, November 30, 2016 by Markeyvion

Math
In a circus a tightrope is stretched from the top of a 10 ft. pole to the top of a 25 ft pole. The poles are 36 feet apart and vertical. How long is the tightrope? Show your work.
Wednesday, November 30, 2016 by Amy

Math
One half of a number plus three is eighteen. Find the number
Wednesday, November 30, 2016 by Anonymous

math
i need help with a problem wanting me to explain the differences between silver and gold using the terms atom and elements
Wednesday, November 30, 2016 by Tyler

math
Find the initial amount given an exponential function. Given the equation y = 24(0.77)^t, what is the initial amount? To find the initial amount, I need to replace t with 0. When I do that, I get y = 24(0.77)^0 which is y = 24(1), so y = 24 In doing other problems, that first ...
Wednesday, November 30, 2016 by Carly

Math
Evaluate the expression when a = 6. a-24 A.-30*** B.-18 C.18 D.22
Wednesday, November 30, 2016 by Sid.V

Math
1. Suppose y varies directly with x and, y=15 and x=5. Write a direct variation equation that relates x and y. What is the value of y when x=9? I need a little help on how to figure out how to write this out. Any help will be appreciated. Thank you
Wednesday, November 30, 2016 by Anonymous

math
I have ten,ones and tenths.My digits are next door numbers and they add up to 9. What number am I?
Wednesday, November 30, 2016 by Owen

Math
1.The difference of a number and sixteen A.n + 16 B.n - 16 C.16n*** D.n/16
Wednesday, November 30, 2016 by Sid.V

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