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February 21, 2017

Search: mathematics: algebra;equations

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

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