Monday
September 26, 2016

Homework Help: Math

Branches of Math

Recent Math Questions

Math Help needed quickly
In a mixture of alcohol and water the concentration of alcohol is 55%. Water is 20 ml less than alcohol in the mixture. There should be _____ ml of alcohol and ____ ml of water to make up ____ ml of mixture
Friday, September 9, 2016 by Quang

Math
A 75% alcohol concentration mixture of water and alcohol and was made by mixing 30 ml of pure alcohol with 150 ml of original mixture
Friday, September 9, 2016 by Jordan

math
Sum of 2 numbers =14 Difference of the numbers =40 Find the numbers. What is their difference?(show work)
Friday, September 9, 2016 by I REMAIN ANONYMOUS

Math
The GCF of two numbers is 5. The LCM is 60. One of the numbers is 20. What is the other number?
Friday, September 9, 2016 by Devan

Math
The function f relates state variables f:Q↦S according to a power function f(x)=Axp. For each state, give the corresponding equation involving the parameters A and p. (Q,S)=(6,11) implies ____=_____ (Q,S)=(5,19) implies ______=_____
Friday, September 9, 2016 by Terrance

Math
Machine A was able to finish copying a set of document in 36 minutes. Machine B was brought in to work together with machine A to finish copying the document in 20 minutes. How long would it take machine B to finish copying the document by itself
Friday, September 9, 2016 by John

Math
You bought a new car for $26,500 in 2005, and the value of the car depreciates by $900 each year. Find a formula for V, the value of the car, in terms of t, the number of years since 2005.
Friday, September 9, 2016 by Billy

Math HELP!
Richard paid $80 per hour plus $55 for parts to get his computer fixed. If Richard paid a total of $175, how many hours did he pay for?
Friday, September 9, 2016 by Amanda

Math
The population of a town in 1920 was 3500 people. The town's population decreased linearly, and in 1927 the population was 3185. Find a formula for P, the town's population, in terms of t, the number of years since 1920.
Friday, September 9, 2016 by Sarah

Math
The following equation relates u and t. 3t=(1)/(7+u) Solve for u as an explicit function of t.
Friday, September 9, 2016 by Sarah

Math
In a class of 35 students 29 play droughts,16 play chess and 10 play both droughts and chess what's the number of students who play droughts only and chess only???
Friday, September 9, 2016 by Rhonda

Math
A function f is defined by the equation f(x)=4x−8. Suppose that the state variables T and Q are related by this function according to the mapping f:Q↦T. Suppose that T=3. Use the equation of the function to find the value of Q.
Friday, September 9, 2016 by Zach

math
which property is illustrated by the equation 5/6(-11)=-11(5/8)
Friday, September 9, 2016 by ellen

Math
The cost for 3 dinners plus a 15% tip is $27.60. Write an equation representing the situation if p is the price of the dinner in dollars. You may asssume there is no tax.
Friday, September 9, 2016 by Bobby

Math
A circle has a radius of 8cm . Find the length s of the arc intercepted by a central angle of 110° .
Friday, September 9, 2016 by Ange

math
If the difference between the exterior regular polygon and an (n+1) sided regular polygon is 12 find the value of n.
Friday, September 9, 2016 by poonam

Math
A bag contains 8 white, 6 black and 4 red discs. They are selected at random and not replaced. What is the probability that there is at least one black disc in the first four discs drawn out of the bag?
Friday, September 9, 2016 by Grace

Math
27 marbles in a bag containing 9 black, 5 white, and 13 clear what is the percent of getting a white.
Friday, September 9, 2016 by Cody ragland

MATH
IF ALPHA +BETA=PI/2 THEN SIN ALPHA =1/3 THEN SIN BETA =?
Friday, September 9, 2016 by R.SURYA PRAKASH

math
1. Give an example of an open equation. 2. How can you use an equation to make a prediction from a pattern ?
Friday, September 9, 2016 by oto

math
you have 8 different flavors of ice cram and 10 diff toppings how many different desserts could you make
Friday, September 9, 2016 by Anonymous

math
The perimeter of a rectangular garden is 46. The length is 7 less than 4 times the width. What are the dimensions of the garden?
Friday, September 9, 2016 by stacy

math
innthe expression 17-4x=67-9x, what is the value of x? please show me the steps.
Friday, September 9, 2016 by Arvee

Math
x-y=5 x+y=7
Friday, September 9, 2016 by Usman

math 101
8 janitors can clean the college grounds in 3 hours. how long will it take 6 janitors to clean the college grounds?
Friday, September 9, 2016 by Arvee

Math
Which table shows a function whose range has exactly three elements? x |f(x) 1 | 4 2 | 4 3 | 4 /////// x |f(x) 3 | 8 4 | 6 5 | 12 6 | 8 /////// x |f(x) 0 | 5 2 | 9 0 | 15 /////// x |f(x) 1 | 4 3 | 2 5 | 1 3 | 4 Is the answer C? I was also thinking A since the f(x) values are 4...
Friday, September 9, 2016 by Sandy East Ward

Math
Increase the quotient of 1/2 and 2 by 1
Friday, September 9, 2016 by Tata

Math
Find the area of the largest square that can be cut from a circle whose radius 4 mm?
Friday, September 9, 2016 by Anonymous

Math
Two spheres of copper, of radii is 1 cm. and 2 cm. respectively, are melted in to a cylinder of radius 1 cm. Find the altitude of the cylinder.
Friday, September 9, 2016 by Anonymous

Math
first five number of: a) Palindromic numbers b) Triangular numbers c) Square numbers
Friday, September 9, 2016 by Tula

math
Show the functions f= f(z); z=x+iy is nowhere di fferentiable f(z)=cosy -i siny how do i do this? heres my idea separate them into u(x,y) and v(x,y) then differentiate them and since the first derivative of u(x,y) and v(x,y) does not equal i can deduce that they are ...
Friday, September 9, 2016 by lim

Math.
Define quantum
Friday, September 9, 2016 by Jst

Math.
A shop was selling chocolates for rd.1and if you get return 3wrappers you get o e free.if so how many chocolates can you get for rd 45.
Friday, September 9, 2016 by Jst

Math
The least common multiple of two numbers is 60 and one of the numbers is seven less than the other number what are the numbers? justify your answer
Friday, September 9, 2016 by Ariana

MATH TRIGONOMETRY
refer to the polynomial function f(x)= -x(x-1)(x+2) in anwering the folloowing questions. 1.what is the y intercept? 2.what is the behavior of the left end of its graph? 3.will the graph pass through the origin? 4,what is the behavior of the left end of this graph? 5how many ...
Thursday, September 8, 2016 by skusta

Math
The sum of two numbers is 28 more than their difference. If their difference is 10, and 14 the less number, what is five times the greater?
Thursday, September 8, 2016 by Mike

Math
If f(x) = x^2 - 1, which of the following three choices are on the graph of f(x)? A:(0,1) B:(1,0) C:(3,5) D:(5,24) E:(-2,3) F:(-4,-17) I think it is A, C, and D.
Thursday, September 8, 2016 by Sandy East Ward

Math
Which table shows a function whose range has exactly three elements? x |f(x) 1 | 4 2 | 4 3 | 4 /////// x |f(x) 3 | 8 4 | 6 5 | 12 6 | 8 /////// x |f(x) 0 | 5 2 | 9 0 | 15 /////// x |f(x) 1 | 4 3 | 2 5 | 1 3 | 4 Is the answer D?
Thursday, September 8, 2016 by Sandy East Ward

Math
8(7-3*9)/8+245
Thursday, September 8, 2016 by Ellie

Math
Which of the following pairs could represent a function? Select three that apply. A: {(2,-5),(4,-5), (6,2), (8,3)}** B: {(-1,5),(3,5),(6,5), (9,5)}** C: {(3,-4),(5,2), (3,8), (6,7)} D: {(0,3), (4,2),(-1,7), (0,3)} E: {(-1,1),(-1,6),(-1,8), (-1,0)} F: {(-4, 2),(3,-2), (-4,-2...
Thursday, September 8, 2016 by Sandy East Ward

Math
Juan added a set of parentheses and a set of brackets in the expression below. Juan's expression has a value of 40. 15/3*5+4*8=
Thursday, September 8, 2016 by Carmen

Math
What types of problems can be solved using the greatest common factor what types of problems can be solved using the least common multiple
Thursday, September 8, 2016 by Natie

Math
Joe has 1/4 yard of wire that he wants to cut into 5 equal sized pieces. How many inches long will each piece be?
Thursday, September 8, 2016 by Fabian Rodriguez

Math
they have 25 feet of fencing to build the compost bin what is the area of the largest bin they can build? what are the dimensions of the bin with the largest area
Thursday, September 8, 2016 by Bella

Math
Using in a number sentence the numbers 2...6...and 8 have to equal 11
Thursday, September 8, 2016 by Austin

Math
Hello, I need help solving two systems of equations. I'm not sure how to solve them. They are: 7w+e=8 e+5=9 And the second one is: 7e=107-6d 7e+8d=117 Thanks!
Thursday, September 8, 2016 by Julie

math
Water contained by a dam exits a spill-way 685ft above the base of the dam. Determine the velocity of the water as it strikes the base of the dam if its initial velocity as it leaves the spillway is negligible.
Thursday, September 8, 2016 by Bob

Math
Explain how you know if a number can be divided by 10 evenly
Thursday, September 8, 2016 by Elizabeth

Math
Timmy has 12 watermelons and Tina has 14, each watermelon with 12.73 inches and 2.7 inches in hight. Then what is the total length of Tina's watermelon's how over Timmy's *Solve for x= the untold length of watermelon*
Thursday, September 8, 2016 by Anonymous

Math
Write the number in two other forms.
Thursday, September 8, 2016 by Xitlali

math
Sarah baked 78 cupcakes for the bake sale. Gabby baked 45 cupcakes for the bake sale. 93 cupcakes were sold at the bake sale. Which is a way to find the number of cupcakes NOT sold? A.Add 78,45,and 93. B. Find the sum of 78 and 45. Then subtract 93. C. Find the difference ...
Thursday, September 8, 2016 by Tommy

Math
Hi John. wants to receive a 96% average on 4 math tests .So far he has taken 3 tests.His grades are 94%, 98%, and 98%. Write an equation in terms of to find
Thursday, September 8, 2016 by Anonymous

Math
The area of a rectangular garden is 38 1/4 square meters. The width of the garden is 4 1/2 meters. Find the length of the garden. I am completely confused on this problem and desperately need step by step instruction on this one.
Thursday, September 8, 2016 by Matt

Math
Ron had 20 apples. He used 2/5 of the apples to make pies. How many apples did Ron use for pies? 2/5x20/1=40/5 40 divided 5=8 Answer: Ron used 8 apples for pies Can you please check this for me to make sure I am correct?
Thursday, September 8, 2016 by Matt

Math
I usually have big problems with word problems but here it goes: On his twelfth birthday, Ben was 4 3/4 feet tall. On his thirteenth birthday, Ben was 5 3/8 feet tall. How much did Ben grow between his twelfth and thirteenth birthdays? 5 3/8-4 3/4=3 feet Can you please tell me...
Thursday, September 8, 2016 by Matt

Math
12) 2 1/7 x 3 2/3= 15/7x11/3=165/21=55/7=7 6/7 13)Divide. Write the answer in simplest form 3/7 divided by 2/3=9/14 14)1/8 divided by 3/4=1/6 15)2 1/7 divided by 3 2/3=45/77 Can you please check to see if I got the above answers correct Thank you
Thursday, September 8, 2016 by Matt

math
Find the domain of the function algebraically and support the answer graphically h times x equal the square root of 4-x squared divided by x - 3
Thursday, September 8, 2016 by tee

Math
3/7 x 14/15=2/5 1 1/3x 5/8=5/6 1 2/9x 1 1/2=2 1/3 can you please check the above problems and let me know if I got the correct answers in simplest form.
Thursday, September 8, 2016 by Matt

Math
5/6x2/3= 10/18=5/9 Can you check this problem for me?
Thursday, September 8, 2016 by Matt

Math
7/8-5/12= 21/24-10/24=11/24 Can you check to see if I did this right and if not can you help me figure it out. Thank you for all your help.
Thursday, September 8, 2016 by Matt

Math
What number am I 14 hundreds 5 thousands 8 tens
Thursday, September 8, 2016 by Amber

Math
Subtract. Write the answer in simplest form. 1) 3/7-4/5=10/35-28/35 This is the part that I got too and I don't know if I did it correctly or not. Can you please tell me how to do this or show me.
Thursday, September 8, 2016 by Matt

math
How would you set up an equation to solve this problem? A clown weighs 60 lbs more than a trapeze artist. The trapeze artist weighs two thirds as much as the clown. How much does each weigh? Choices for the weight of the trapeze artist are: 110, 120, 125
Thursday, September 8, 2016 by kelley

Math
2/8 plus 6/12= 6/24 + 12/24=18/24=9/12=3/4 Can you please check the above answer and tell me if I got this correct?
Thursday, September 8, 2016 by Matt

Math
On an automobile assembly line, every third car is green. Every fourth car is a convertible. a) How many cars are out of the first 100 will be convertibles? b) Which number of car is First Green convertibles? Grade 7 Math Please answer, ASAP.
Thursday, September 8, 2016 by Vince

Math
What are the missing numbers between 10 22 34 46 58 on the number line
Thursday, September 8, 2016 by Anonymous

Math
Add. Write the answer in simplest form 1 9/10 plus 3/4 19/20 plus 3/4= 38/20 plus 15/20=53/20=2.65 Please let me know if I got the correct answer or if I am doing anything wrong.
Thursday, September 8, 2016 by Matt

Math
Add. Write the answer in simplest form. 1. 3/8 + 4/5= 3/8=15/40 4/5=32/40 15/40 plus 32/40=47/40 47/40=1.175 Please let me know if I got the correct answer or if I did something wrong.
Thursday, September 8, 2016 by Matt

Math
Two spheres of copper, of radii is 1cm and 2cm respectively, are melted into a cylinder of radius 1cm. Find the altitude of the cylinder.
Thursday, September 8, 2016 by Anonymous

Math
Find the area of the largest square that can be cut from a circle whose radius 4 mm
Thursday, September 8, 2016 by Anonymous

Math
The formula for the perimeter of a rectangle is P = 2l + 2w. The length of a rectangle is 3 times its width. Which expression represents the perimeter of the rectangle? Question 3 options: 2 + w(3w) 2 + w(w + 3) 2(3w) + 2w 2(w + 3) + 2w
Thursday, September 8, 2016 by Jay

math
A cylindrical tin of diameter 9cm and height 224cm is half filled with water.Find the volume of water in the tin.
Thursday, September 8, 2016 by Kevin

math
32 cans for 7 dollars how much per can
Thursday, September 8, 2016 by robert

Math
Translate this sentence into an equation. 11 more than Donnie's savings is 55 . Use the variable d to represent Donnie's saving
Thursday, September 8, 2016 by Cyfair

Math
An equilateral triangle the real formula use in calculating it
Thursday, September 8, 2016 by Patricia

math
Find the complement of the angles 78 degree 43 second
Thursday, September 8, 2016 by lalremsiami

Math
John. wants to receive a 96% average on 4 math tests .So far he has taken 3 tests.His grades are 94%, 98%, and 98%. Write an equation in terms of to find
Thursday, September 8, 2016 by Anonymous

Math
I have 13 tens who am I?
Thursday, September 8, 2016 by Liana

Math
An airplane travels 1260km in the same time a car travels 420km. If the rate of the car is 120kph less than the rate of the airplane, find the rate of each.
Thursday, September 8, 2016 by Raquel

Math
An airplane travels 1260km in the same time a car travels 429km. If the rate of the car is 120kph less than the rate of the airplane, find the rate of each.
Thursday, September 8, 2016 by Raquel

Math
John. wants to receive a 96% average on 4 math tests .So far he has taken 3 tests.His grades are 94%, 98%, and 98%. Write an equation in terms of to find
Thursday, September 8, 2016 by Raegan

liberal arts math
A population of 240 animals decreases at an annual rate of 10%. Find the multiplier for the rate of exponential decay.
Thursday, September 8, 2016 by denise

Math
Three pictures hang side by side on a wall. What is the total area of the wall that the pictures cover? Length is 10 1/2 inches, 10 1/2 inches, 10 1/2 inches Width 14 2/3 inches Would I need to add 10 1/2 plus 10 1/2 plus 10 1/2 and then multiply by 14 2/3 inches? Please ...
Thursday, September 8, 2016 by Matt

Math
Determine the number of combinations on a bicycle lock that has a 3-digit number combination with only 3 numbers where the numbers can be repeated to open the lock
Thursday, September 8, 2016 by Pedro

Math
Liam has 8 3/4 gallons of paint. He wants to use 2/5 of the paint to paint his living room. How many gallons of paint will Liam use? Multiply 8 3/4 x 2/5=70/20 70/20=3.5 Answer: Liam will use 3.5 gallons of paint Is this correct?
Thursday, September 8, 2016 by Matt

Math
Find the value of k in simplest form for which the larger root of x^2-5x+k=0 is x-5
Thursday, September 8, 2016 by Andarah

Math
find the value of k in simplest form for which the larger root of x^2-5x+k=0 is √6+√11 * √3+√3+√11 * √3+√6+√3+√11 * √3-√6+√3+√11.
Thursday, September 8, 2016 by Andarah

math
There are 568 apples and oranges in a box. There are 40 more apples than oranges. 15 oranges are rotten. How many more apples than fresh oranges are there in the box? work: apples + oranges = 568 apples = oranges + 40 (since there are 40 more apples than oranges) how do i ...
Thursday, September 8, 2016 by shania

math
from a particular point the angle of elevation of the top of a church spire is 35 degrees. walking 30 metres closer to the church the angle of elevation of the top of the spire increases by 20 degrees. a. how far from the church was the second elevation taken? b. calculate the...
Thursday, September 8, 2016 by Anonymous

Math
Simplest form for 2/3 times21
Thursday, September 8, 2016 by Cindy

math
(a) RSTU is a cyclic quadrilateral in a circle of centre O.If RUT is 40°, what are the two values of <ROT (convex and concave)? (b) A RHC has a triangular catchment’s area PQR such that PQ = 22.1Km; PR = 13.5Km and <RPQ =56°. Find <PRQ.
Thursday, September 8, 2016 by bliss

Math
what is the width of a rectangle with a perimeter of 70 feet and length-to-width ratios of 3 to 4,4 to 5 and1to1
Thursday, September 8, 2016 by Abby

Math
Two trains leave the same station at the same time, but are headed in opposite directions. One train travels at 70 mph and the other train travels at 80 mph. How much times passes until the trains are 600 mi apart?
Thursday, September 8, 2016 by NeedHelp

math
(a) Simplify the following: (i) i345 (ii) 32/(-5i) (iii) 6/(7-8i) (iv) 9/(-8+7i) (b) Find the nature of the stationary points on the curve y = 4x3 – 3x2 – 6x + 2
Thursday, September 8, 2016 by bliss

math
(a) If K(−3, − x) and L(3,−4) are such that KL is perpendicular to MN with M(− 5, −6) and N(−3,− 5), find the value of x. (b) The curve y = ax2 + bx + c passes through the points (0, 2) and (1, 3) and its gradient where x = 1 is 6. ...
Thursday, September 8, 2016 by bliss

math
(a) A circle has centre at (−2,−1). One point on its circumference is (−2, −3). Find its radius, correct to 1d.p. (b) If y = x2 for 0 £ x £ 2 is completely rotated round the x – axis, find the volume of the solid of revolution produced.
Thursday, September 8, 2016 by bliss

math
(a) Integrate wrt x:(〖2x〗^4- x^2+2)/x^2 (b) The gradient of the tangent at a point on a curve is given by x2 + 2x – 2. Find the equation of the curve if it passes through (2,3).
Thursday, September 8, 2016 by bliss

Math
Complete the data set with one value so the mean of the data is 13 using numbers 10, 14, 8, 16, 12, x. X=18 Which value can you remove from new set of data so that mean is 14?
Thursday, September 8, 2016 by Teresa

math
(a) Find the resultant of the following coplanar forces acting at point O: 44N in direction 54°, 77N in direction 90°, 60N in direction 146°, 88N in direction 245°. Directions are measured anticlockwise from the positive x-axis. (b) If y = (x2 – 2x + 5)(3x...
Thursday, September 8, 2016 by bliss

Math
-3 =8x-4y solve for y
Thursday, September 8, 2016 by Teresa

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