Tuesday

February 21, 2017
Number of results: 47,371

**Applied Mathematics ( Mechanices**

A stone is thrown vertically upwards with a velocity of 14.7 meters per second from a window 29.4 meters above the ground. How long does it take to reach the ground? THis is what I came up with : Acceleration= -9.8 final velocity= 0 initial velocity = 14.7 therefore : a= (v-u)/t

*July 2, 2015 by Babita*

**Business Mathematics**

Taxi fare from an airport to a nearby town is $0.80 per mile driven, plus $2 for tolls. Let y represent the lare and r the miles driven on one trip. write the equation for y in terms of r. Find the fare when the distance driven is 17 miles.

*June 7, 2016 by Bithy*

**Math**

In a mathematics olympiad there are 20 finalists. In how many ways can three equal prizes be awarded, assuming that two prizes cannot be given to one finalist? In how many ways can a first, second and a third place be awarded? (I understand that Permutations and Combinations ...

*January 17, 2011 by Jen*

**mathematics**

Key: logx= log base x 1. Prove that: (logx64 +logx4 -logx8)/(logx1024) =1/2 2.factorize by grouping r^2s^2+3t^2+r^2t^2+3s^2 3.factorize the following expression 49p^2-1/25 4.simplify i.(ax+bx+ay+by)/(cx+cy+dx+dy) ii.(3/4+1/2) / (1/3+1/2) 5.two thirds of a number together with ...

*March 12, 2015 by Bettina*

**Mathematics Help**

Giving a test to a group of students, the grades and genders are summarized below. A B C Total Male 3 15 11 29 Female 14 9 12 35 Total 17 24 23 64 If one student is chosen at random, find the probability that the student was female OR received a grade of "C". (Leave answer to ...

*October 8, 2016 by Anonymous*

**mathematics**

the area of a rectangle is 175 and the length is 1 and a half times bigger than the width. find the width L x W = Area L = 1.5W 1.5W x W = 175 or 1.5W^2 = 175 W^2 = =116.666 making W = 10.80... and L = 16.20... 10.80... x 16.20... = 175

*September 12, 2006 by ayinde*

**mathematics**

an equilateral triangle has a equal perimeter of a rectangle whose length is 12 meter and whose width is 8.7 meter fined the measurement of the side of the equilateral triangle.

*January 11, 2012 by michael*

**mathematics**

A person can drive from city A to city B at a certain rate of speed in 6 hours. If she decreases her speed by 10 mph, she can make the trip in 8 hours. How far is it from city A to city B?

*May 1, 2013 by Anonymous*

**mathematics**

6. In a GP the 3rd term is equal to four times the first term and the sixth term is equal to three times the fourth term plus 32. Determine the sequence.

*May 3, 2016 by patricia*

**mathematics**

points P and Q are both in the line segment AB and on the same side of its mid point p divides AB in the ratio 2:3 and Q divides in the ratio 3:4. if PQ=2 then find the length line segment AB

*August 29, 2016 by mahe*

**mathematics**

A man takes a 500km trip in his car, He rotates his tyres (four on the car and one spare) so that in the end of the trip each tyre has been used for the same number of kilometres. How many kilometres did each tyre cover?

*August 28, 2015 by Samuel*

**mathematics**

evng .my teacher gave me this as a homework but i dnt undertand. 1.In a GP the 3rd term is equal to four times the first term and the sixth term is equal to three times the fourth term plus 32. Determine the sequence.

*May 3, 2016 by patricia*

**Business mathematics**

A sum of money when invested for a definite period at r% simple interest will yield an interest of rm80 .using the same interest rate, find the interest earned if the sum is tripled and the investment period is doubled

*October 30, 2016 by Muhammad nur ikhwan*

**managerial economicsQ3**

Suppose the inverse market demand equation is P = 80 ¡V 4(QA+QB), where QA is the output of firm A and QB is the output of firm B, and both firms have a constant marginal cost of $4 (fixed costs are zero). (a)Write down the profit equations for firms A and B. (b)Write down ...

*September 7, 2008 by jenny*

**equations**

I am not great at equations... I keep practicing and working these problems and questions out but I always seem to get different answers can someone please guide me on how or tell me the correct way to work these problems out>> The linear equation y=0.15x + 0.79 ...

*October 25, 2009 by Anonymous*

**equations**

I am not great at equations... I keep practicing and working these problems and questions out but I always seem to get different answers can someone please guide me on how or tell me the correct way to work these problems out>> The linear equation y=0.15x + 0.79 ...

*October 25, 2009 by Anna*

**to REINY**

you have been of much help tonight, I truly appreciate that. I can also, honestly, say that I can retrace my steps and explain how I arrived at the answer after your detailed explanations. Thank you very much. Hope to one day help someone as you have helped me (maybe in ...

*January 23, 2014 by Andy G*

**Mathematics**

A basket contains 80 mangoes and 60 oranges.if two fruits are picked one after the other without replacement,what is the probability that 1) one of each fruit is picked 2) one type of fruit is picked

*March 3, 2016 by Bright ulubi*

**MATHEMATICS**

A TREE AND A FLAGPOLE ARE IN THE SAME GROUND.A BIRD ON TOP OF THE TREE OBSERVES THE TOP AND BOTTOM OF THE FLAGPOLE BELOW IT AT ANGLES OF 45 AND 60 DEGREES RESPECTIVELY. IF THE TREE IS 10.65m HIGH WHAT IS THE HEIGHT OF THE FLAGPOLE?

*May 9, 2016 by SILVER*

**Discrete Math: Equations of Line in a Plane**

I'm stuck on these questions. Can you please show me a step by step solution? 20) For each of the following, find a normal vector, a direction vector, and a point of each line. Note, normal vector means perpendicular to the direction vector. a) 3x - 6y = 14 TEXTBOOK ANSWER: ...

*March 12, 2008 by Anonymous*

**Algebra**

The profit made from the sale of tiles is found by subtracting the costs from the revenue. (This is the money you take in minus the money you spent.) g. Find the Profit Equation by substituting your equations for R and C in the equation . Simplify the equation. Suppose the ...

*March 5, 2012 by Fred*

**Mathematics**

George vacuums the rugs every 21 days, mows the grass every 12 days, and pays the bills every 15 days. Today he did all three. How long will it be before he has another day like today?

*October 22, 2013 by Kassey*

**Help!Math....**

Six pears and three apples cost $3.90. Two pears and five apples cost $3.30. How much does one pear cost? Hint: You have two unknowns (variables), so you need two equations. Write one equation for each situation and solve the system of equations. (1): Six pears and three ...

*November 15, 2006 by Jessica*

**mathematics**

need help badly. this is the math problem. is the rate three-forth's cup of butter/ 3 eggs equivalent to the rate of 3 cups of butter/12 eggs? Please show the work so I can study this equation for my next problem. thanks kindly

*August 29, 2010 by cindy*

**Mathematics**

The difference between the x-coordinates of two points on the parabola y^2=4ax is fixed at 2k. Find the equation that describes the position(xp, py)of the point of intersection P of the tangents at the two points. The equation is in the form yp^2=f(xp). Hence show that 4axp<...

*December 18, 2010 by Louis*

**PROBLEM SOLVING IN MATHEMATICS**

The Andersons are buying a new home. They need to fence the yard because they have a dog. The yard is 72 ft. by 120 ft. Each fencing section is 8 ft. How many sections will they need? How many posts will they need? (a post is needed at the end of each section). What else will ...

*October 22, 2011 by alya*

**MATHEMATICS**

A SECTOR IS USED TO FORM ACONE IF THE RADIUS AND ANGLE OF THESECTOR IS 8CM AND 160 DEGREE RESPECTIVELY CALCULATE, THE RADIUS OF THE CONE ,VERTICAL HEIGHT, VERTICAL ANGLE, VOLUME AND TOTAL SURFACE AREA OF THE CONE

*October 19, 2015 by GINA*

**Math 101**

1. Best Rentals charges a daily fee plus a mileage fee for renting its cars. Barney was charged $123.00 for 3 days and 300 miles, while Mary was charged $216.00 for 5 days and 600 miles. What does Best Rental charge per day, for mileage? 2. There were 44,000 people at a ball ...

*October 23, 2011 by Ann*

**Math-G7 Help please**

Write a system of equations to match each of these problems. Then solve the equations using the method... Substitution, or linear combinations. _____________________________________ 1. Dan is 4 years older than his brother Gabriel. Together their ages equal 22. How old is each...

*October 1, 2014 by JORDAN*

**mathematics,physics,life science,LO,afrikaans**

A number of circles are given and the area of the smallest circles is 4π.The area of the next circle is 9/4 times of the previous circle.if there are 6 circles,determine the length of the diameter of the last circle.

*March 8, 2015 by uchriciah*

**college mathematics**

in exercises 35-40 write the statement in symbolic form let p: The tent is pitched q: The bonfire is burning # 38 The bonfire is not burning if and only if the tent is not pitched

*November 24, 2011 by miss c*

**college mathematics**

in exercises 35-40 write the statement in symbolic form let p: The tent is pitched q: The bonfire is burning #40. The bonfire is not burning, however the tent is pitched.

*February 2, 2012 by cody*

**Mathematics**

The 25 term of an Arithmetic Progression is 7 1/2 and the sum of the first 23 terms is 98 1/2. Find the i. 1st term ii. common difference iii. sum of the first 30 terms

*December 11, 2013 by Jamiu*

**Discrete Mathematics**

Two Dice, one red and one white are rolled, what is the probability that the white die turns up a smaller than the red die ?

*March 18, 2014 by Anupam*

**algebra 2**

Posted by hellogoodbie on Saturday, January 16, 2010 at 3:24pm. Posted by hellogoodbie on Saturday, January 16, 2010 at 2:59pm. How is this problem done? IF f(x)=2x^2-8x-3 FIND f(-2) algebra 2 - bobpursley, Saturday, January 16, 2010 at 1:42pm Put in for x the value -2, and ...

*January 16, 2010 by hellogoodbie*

**mathematics**

If 3xy^3 - 4x = 10y^2, find y ' (x) a) (4 + 3y^2)/(9xy^2 + 20y) b) (4 - 3y^2)/(9xy^2 - 20y) c) (3 + 4y^2)/(20xy^2 + 9y) d) (3 - 4y^2)/(20xy^2 - 9y)

*May 11, 2008 by Donna*

**Mathematics**

"Kim is 15. Kim's father is 39. In how many years will Kim's father be exactly twice as old as Kim will be?"

*April 8, 2013 by Anonymous*

**Mathematics**

"Kim is 15. Kim's father is 39. In how many years will Kim's father be exactly twice as old as Kim will be?"

*April 8, 2013 by Anonymous*

**mathematics**

express as a single fraction:X to power -1/3 times Y to power 1/3 minus X to power 2/3 times Y to power -2/3.

*August 24, 2015 by SAUL SILUNGWE*

**Physics Classical Mechanics**

A uniform steel beam of mass m1= 300.0 kg is held up by a steel cable that is connected to the beam a distance L= 5.0 m from the wall, at an angle θ= 40.0∘ as shown in the sketch. The beam is bolted to the wall with an unknown force F⃗ exerted by the wall on ...

*November 26, 2013 by A*

**Algebra**

4x-5y=-2 3y-x=-3 4x+5y=-2 4y-x=11 3x-6y=5 2y=4x-6 2x+y=9 2x-5x=15 3y-x=0 x-4y=-2 3(y-1)=2(x-3) 3y-2x=-2.25 y=3x y=3x+1 Alkana and Hsu together earn $84,326 per year. If Alkana earns $12,468 more per year than HSU, then how much does each of them earn per year? Mrs Brighton ...

*July 23, 2005 by eze ogbonna*

**PreCalculus 1**

I have graphed the equations onto my calculator but I don't know how to answer the questions. Can someone explain this to me? 2. Coco, the wonder cat, is watching a spider on a wall that is 18 feet wide and 12 feet tall. The spider moves along for 10 seconds along a path ...

*July 7, 2016 by Anonymous*

**Math: Equations of Line in a Plane**

I'm stuck on these questions. Can you please show me a step by step solution? 20) For each of the following, find a normal vector, a direction vector, and a point of each line. Note, normal vector means perpendicular to the direction vector. a) 3x - 6y = 14 TEXTBOOK ANSWER: ...

*March 10, 2008 by Anonymous*

**chemistry**

Please, will someone help me balance this equation? There's always one element I just can't seem to balance. Cu+HNO3===>NO2+Cu(NO3)2+H20 Thanks for the help. Try this. Cu + 4HNO3 ==> 2NO2 + Cu(NO3)2 + 2H2O You're a genius! Do you think you could tell me how you ...

*March 5, 2007 by Fidelia*

**Mathematics**

the perimeter of a rectangular field is 140m. If the length is increased by 15m and the breadth is decreased by 5m, the length will become 3 time the breadth. find the length and breadth of the field.

*April 15, 2013 by Toni*

**Algebra 2**

The income from the school car wash is one, five, and ten dollar bills came to a total of $355. If there are 120 bills all together, and twice as many one dollar bills as five and ten dollar bills combined, how many bills of each denomination are there? How do I get three ...

*November 17, 2015 by Nicole*

**Mathematics Ayra**

6. Vangie had 0.75 ream of bond paper. She used 0.25 of it in her project. What part of the ream of paper did she use? Please answer this question. Percent=peice/whole * 100 = .25/.75 * 100 Fraction= piece/whole= .25/.75 = 1/3 Thanks for your information! Thanks for your help!!!!

*October 16, 2006 by The Cutest Bird in the Whole World - Baby Bird*

**mathematics**

A balloon is in the shape of a cylinder with a hemisphere at both ends.The height of the cylinder is 4 times that of the radius.Air is pumped in the balloon at a rate of 60cm cubed per second .At what rate does the surface area change if the radius is 8cm?

*July 16, 2014 by kgothy*

**proper mathematics**

Linda borrows 4000 from his father to go on a trip to Kenya.he will have to pay the money back in 10 years time.his father will charge him a simple interest rate of 4% p.a.how much will Linda have to repay after 10 years?

*February 16, 2015 by perseverance smith*

**Further mathematics**

Given that x squared + y squared = 5xy,show that; (a) 2log(x+y\√7)=log x + log y. (b). Log ( x- y\√3) = 1\2( log x + log y)

*November 23, 2016 by Anonymous*

**MatHematics**

After a 20 year period Josh's lump sum investment matures to an amount of R313550. How much did he invest if his money earned interest at a rate of 13,65% p.a compounded half yearly for the first 10years ,8,4% p.a compounded quarterly for the next five years and 7.2 p.a ...

*August 16, 2013 by Nomuntle...Mphela*

**Further mathematics**

An exponential sequence of positive terms and a linear sequence have the same first terms.the sum of their second terms is 3/2 and the sum of their third terms is 6.find their fifth terms.

*November 20, 2011 by Tosin*

**to bobpursley**

I don't understand any of the information you gave me to solve the problem. Ok, write the two equations ( I did one). Now graph them. Where do they cross?

*December 10, 2006 by Joeis*

**math**

How do you write a system of linear equations in two variables? Explain this in words and by using mathematical notation in an equation.

*January 22, 2013 by ty*

**Help With Math**

Using the quadratic formula to solve equations. -12^2 + 12 x-9 = -7x^2 10x^2 + 5x + 12 = 0 6x^2 + 12x = - 1 11x^2 - 7x -1 = 0 2x^2 -18x + 16 = 0 Can u show work to help me out

*November 13, 2007 by Monte'*

**Math**

Can anyone explain Horizontal Equalities Equations? I also would appreciate examples of problems and the steps to solve the problem.

*December 7, 2007 by Jo Anne*

**Chemistry**

How can I tell if the following equations produce precipitates or not? 1. HgCl2 (aq) + K2CrO4 (aq) ==> 2. Ba(OH)2 (aq) + NaClO3 (aq) ==> 3. ZnI2 (aq) + CaSO4 (aq) ==> 4. SnCl2 (aq) + MgBr2 (aq) ==>

*January 10, 2008 by Cierra*

**Math**

Addition and subtraction are examples of what are BEST called _________? a. variables b. terms c. equations d. operations Answer would be D

*October 7, 2008 by Jen*

**chemistry**

Write balanced half-cell reactions and equations for the following: Mo24O37(s) + MnO4-(aq) makes MoO3(s) + Mn+2(aq) (BASIC)

*November 8, 2008 by kate*

**Math**

need to find the equations of the following, using Ó (and the n=1 which is at the bottom of the Ó) (and infinity is at the top of the Ó) 3) -6/3 - 4/4 - 2/5 - 0 + . . . 4) 9/1 + 36/4 +27/9 + 144/16 + . . . 5) 20/4 + 25/5 + 30/6 + 35/7 +40/8 + ... i still don't grasp how to ...

*March 29, 2009 by Janet*

**solving equations**

I need help understanding the concept of the value of an inequality DQ 2 in week 3 of math 116. any suggestions would be great!

*August 14, 2009 by cassie11*

**Math**

Arectangle has perimeter 64cm and area 23cmsquared. Solve the following system of equations to find the rectangle's dimensions.

*October 24, 2009 by Ariza*

**Organic Chem**

what is the equation including the mechanism for the reaction of 1-butanol with NaCl+ NaBr in H2S04 What are the equations for the side reactions?

*October 26, 2009 by Lori*

**math**

how can i write these equations in standard form with integer coefficients? so #1 is: y=1/2x-3/5 and also #2: y=-8/3x+4/9 I know the formula is Ax+By=C.. but I just don't get these two.. plz explain & thanks!

*October 26, 2009 by green*

**math**

Translate the problem into two linear equations by identifying keywords that represent a mathematical operation or symbol.

*May 16, 2010 by Ashly Morgan*

**math**

identify the ff properties in the given quadratic equations: a.Vertex b. axis of symmetry c. Domain d. Range e direction of graph 1.f(x)=x2-5x+14

*July 25, 2010 by kathleen*

**Math /Equations**

Hi. I need to find the distance between the two points and then round the answer to the nearest hundredth. (8,4) and (18, 28). Thank you so much.

*July 28, 2010 by Jessica*

**Chemistry**

Balance The Following Equations. _SnO2+_Ba(OH)2->_Sn(OH)4+_BaO _Al(OH)3+_(HG2)3_Po4)2->_AlPO4+_HG2(OH)

*January 4, 2011 by Sha*

**Linear Equations**

Solve using the elimination method. If the system has no solution or an infinite number of solutions, state this. 10x - y = 12.5 3x + y = 7

*May 24, 2011 by Wayne*

**chemistry**

give the full, ionic and net equations for the reaction (if any) that occurs when aqueous soulutions of Na2CO3 and MgCl2 are mixed.

*July 4, 2011 by Kayla*

**Precalc**

Write the equation of the hyperbola whose center is at the origin and has a vertical transverse axis. The equations of the asymptotes are 6x + 2y = 0 and 6x - 2y = 0. Is this correct? (y^2/9)-(x^2/4)=1

*August 21, 2011 by Sara*

**Alg 1**

I'm doing quadratic equations x^2 +bx+c =0.I'm supposed to factor each polynomial. I know how to questions like x^2 +8x +12 =0 but this one says, j^2-9jk-10k^2. I'm confused

*October 11, 2011 by Cole*

**Chemistry**

What is the threshold energy of Chromium? I know the answer but i need to show work and through all the equations to get done i get lost. So can someone help me.

*October 12, 2011 by Casey*

**calculus**

Find the volume of the solid generated by revolving the region bounded by the graphs of the equations about the line x = 6. y = 6 − x y = 0 y = 5 x = 0

*January 23, 2012 by ME*

**Geometry**

two perpendicular lines with the equations y=1/3x+9 and y=mx-3 contain the consecutive sides of a rectangle. What is the value of mx in the 2nd linear question.

*March 25, 2012 by monique*

**calculus**

sketch the region R bounded by the graphs of the equations, and find the volume of the solid generated if R is revolved about the x axis when y=x^2 y=4-x^2

*May 1, 2012 by dario*

**calculus**

Sketch the region R bounded by the graphs of the equations and find the volume of the solid generated if R is revolved around the x axis. x= y^2 x-y =2

*May 1, 2012 by casquibaldo*

**calculus**

find the volume of the solid generated by revolving the region bounded by the graphs of the equations y=2sqrtx, y=o, x=3 about the x-axis.

*May 2, 2012 by carlton*

**Calculus**

Find the volume or the solid generated by revolving around the region bounded by the graphs of the equations about line x=6. xy=6, y=2, y=6, and x=6

*May 28, 2012 by Christina*

**Chemistry**

Write equations for the ionization of the following acids.Which ones ionize only slightly? (a) HF (b) H2SO3 (c)CH3COOH (d) HNO3

*December 5, 2012 by Guy*

**math**

How do i solve algebraic methods in addition/ subtraction problems such as rewriting the following equations in standard form. 5x + 4 = -9y

*December 10, 2012 by Antrinique*

**Chemistry**

Using chemical equations, show how the triprotic acid H3PO4 ionizes in water. Phases, such as (l) or (aq), are optional.

*January 26, 2013 by Debbie*

**Chemistry**

Using chemical equations, show how the triprotic acid H3PO4 ionizes in water. Phases, such as (l) or (aq), are optional.

*January 27, 2013 by Jessica*

**Solving linear equations**

Is there a formula to following or pattern. This is very new to me and I am having issues with these type of problems, please help

*February 8, 2013 by heybaby*

**math**

How do you write a system of linear equations in two variables? Explain this in words and by using mathematical notation in an equation.

*February 12, 2013 by taylar*

**Chemistry**

Using chemical equations, show how the triprotic acid H3PO4 ionizes in water. Phases, such as (l) or (aq), are optional.

*March 26, 2013 by Anonymous*

**Calculus**

Determine whether the planes are parallel or orthogonal. Equations given: 5x - 3y + z = 4 x + 4y + 7z = 1 How exactly do I solve this? It wasn't covered completely in class.

*April 8, 2013 by Krista*

**calculus**

A circle is formed with a center (-3, 5) and a radius 4 write a pair of parametric equations then show how to return to rectangular form

*April 26, 2013 by brady*

**chemistry**

balance half equations in basic solution ClO3- to ClO4- Zn to zn2+ BrO3- to Br- IO3- to I2 Sn2+ to Sn4+

*July 26, 2013 by roxy*

**Chemistry Check?**

Balance Chemical Equations; 1. C2H6(g)+O2(g)---->H2O(g)+CO2(g) Answer: 2C2H12(g)+2O7---->H12O6+2C2+O8

*August 27, 2013 by Unknown*

**maths**

find equations for the tangent and the normal at P (1n2, 2k) on the curve with equation y=ke^x, where k is a constant. (b) given that y=sin^-1x, show that (1-x^2)d^2y/dx^2-xdy/dx=0

*October 3, 2013 by skangele*

**maths**

find equations for the tangent and the normal at P (1n2, 2k) on the curve with equation y=ke^x, where k is a constant. (b) given that y=sin^-1x, show that (1-x^2)d^2y/dx^2-xdy/ dx=0

*October 6, 2013 by gibbsm*

**math 9**

Identify the solution(s) of the system of equations, if any. 3x-2y=6 5x=5-25y A) (28/13, 3/13) B) (-3/17, 32/17) C) (32/17, -3/17) D) (32/9, 7/3) I think the answer is D but i did my check and still comes out incorrect

*October 20, 2013 by sam*

**Chemistry**

Complete and balance the precipitation reactions. Include physical states in your equations. Ba(NO3)2(aq) + CuSO4 (aq)---> K3PO4(aq)+MgCl2 (aq)---->

*November 9, 2013 by Jake*

**chemistry**

Complete and balance the precipitation reactions. Include physical states in your equations. Ba(NO3)2(aq) + CuSO4 (aq)---> K3PO4(aq)+MgCl2 (aq)---->

*November 11, 2013 by lauren*

**chemistry**

By using the method of neutralization the acidity of the bee sting can be neutralized. What is the underlying principle and what are the chemical equations involved.

*January 28, 2014 by kim jung hee*

**Math**

Show all the ways of breaking apart 8/8 write the equations next to each array and draw a line to separate it.

*February 5, 2014 by Anonymous*

**Chemistry**

Write the total and net ionic equations for the following molecular reaction: HgNO3 (aq) + NaCl (aq) -> HgCl (s) + 2 NaNO3 (aq)

*February 20, 2014 by Ellen*

**Math**

How do you write a system of linear equations in two variables? Explain this in words and by using mathematical notation in an equation.

*April 19, 2014 by Felicia Chase*

**Pre-Calculus/Trigonometry**

Solve the following system of equations algebraically. Verify the solution by using matrices. 8x-2y=5 -12x+3y=7

*September 30, 2014 by Anonymous*