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Question 1116727: Sharpay is going shopping for some new stationery. She can buy three pencils and a ruler for 50p or two pencils and 2 rulers for 56p. How much does a pencil cost her?''.

Click here to see answer by ikleyn(52781)

Question 1116758: Dear Algebra.com developers,
I am very proud of you for fixing the CSS injection.
I hope that you learned a very valuable lesson.
'Never trust user input'
P.S.
I see that you are still vulnerable to HTML injection.
As an example, I will use the img tag to show an image:

HTML injection is when you input html code, so that when your preprocesser prints it onto the page, HTML interprets it as source code.
To prevent HTML injection, I recommend checking this out.
Sincerely, BumbleStar
Click here to see answer by ikleyn(52781)

Question 1116656: Find the rate of change in the balance after 5 years if $4,000 is invested into an account that earns 3.5% compounded...
A)monthly
B)continuously
Click here to see answer by Theo(13342)

Question 1116823: rob and ming are selling fruit for a school fundrasier. custoers can buy small boxes of oranges and large boxes of oranges. rob sold 4 small boxes of oranges and 13 large boxes of oranges for a total 232. ming sold 8 small boxes of orag]nges and 14 large boxes of oranges for a total of 272. what is the cost of one small box or oranges and one large box of oranges?

Click here to see answer by josgarithmetic(39617)

Question 1116842: A pilot can fly a plane at 125 mph in calm air. A recent trip of 300 mi flying with the wind and 300 mi returning against the wind took 5 h. Find the rate of the wind.
Click here to see answer by ikleyn(52781)

Question 1116859: A plane flying with the wind went 350 miles in 2 hours. The return trip, flying
against the wind, took 2.8 hours. Find the rate of the plane in calm air and the rate
of the plane against the wind.
Click here to see answer by Alan3354(69443)

Question 1116665: The management of a factory found out that the model
N=30(1-e^-0.09t)
describes the number of units "N" produced after a new employee has worked for "t" days.
A) Find the number of units produced by a new employee after 5 days.
B) What is the rate of change after the first week? Interpret the meaning of the result.
C) Is there a limit as to the number of units per day an employee can produce no matter how long that person has been working for?

Click here to see answer by Theo(13342)

Question 1116896: Find the standard form of the equation of the ellipse with the given characteristics?

Foci: (0, 0) and (4, 0)
Major Axis of length 8
Click here to see answer by greenestamps(13200)

Question 1116869: you have 10 vacant units open three 1 bedrooms renting for $800 a month, six 2 bedrooms renting for $1050 a month and one 3 bedrooms renting for 1475 a month, what is your monthly rental loss if you do not rent these units?
thank you so, so much for walking me thru this problem to get the answer.
Click here to see answer by solver91311(24713)

Question 1116943: If 40% of M equals 20% of A what percent of A is M?
Click here to see answer by Boreal(15235)

Question 1116945: In a class of FAST Entry test preparation at KIPS there are 80% girls. If there are 25 boys how many total students are there in the class?
Click here to see answer by Boreal(15235)

Question 1116946: In a class 19% students are absent on a day. If the number of students present on that day are 162 then the students absent on that day are:
Click here to see answer by Boreal(15235)

Question 1116947: If Rabias average rose from 62 to 82 by what percent did her average increase?
Click here to see answer by ikleyn(52781)

Question 1116860: A clothing manufacturer purchased 60 yd of cotton and 90 yd of wool for $1800.
At the same prices, the manufacturer made a second trip and bought 80 yd of
cotton and 20 yd of wool for $1000. Find the cost of cotton & the cost of wool.
Click here to see answer by solver91311(24713)

Question 1116980: Solve for triangle ABC.
A=14.7� , a=3.8 ft , b=16.2ft
Find angles and sides of this triangle. (This is SSA - I think it is 2 triangle)
Click here to see answer by Theo(13342)

Question 1116868: you have 10 vacant units open three 1 bedrooms renting for $800 a month, six 2 bedrooms renting for $1050 a month and one 3 bedrooms renting for 1475 a month, what is your monthly rental loss if you do not rent these units?
Thank so, so very much for walking thru this problem to get the answer.
Click here to see answer by Boreal(15235)

Question 1117097: I don't understand the problem on which is a^2
b^2=c^2 It's confusing, help
Click here to see answer by ikleyn(52781)

Question 1117081: If two resistors with resistance R1 and R2 are connected in parallel, the total resistance R in ohms is given by 1/R = 1/R1 + 1/R2. If R1 and R2 are increasing at 0.4 ohms/s and 0.25 ohms/s, respectively, how fast is R changing when R1 = 600 ohms and R2 = 400 ohms?
Click here to see answer by Alan3354(69443)

Question 1117109: A baseball player throws a ball to another player on her team. The ball is released from a height of 6 feet and reaches its maximum height of 26 feet 2 seconds after being released. Determine how long the ball is in the air?
Click here to see answer by ikleyn(52781)

Question 1117110: Write a quadratic function that has roots x=-9 and x =-7
Click here to see answer by Alan3354(69443)

Question 1117111: Without calculating the roots, determine the number of roots of 4x squared-x+9
Click here to see answer by ikleyn(52781)

Question 1117111: Without calculating the roots, determine the number of roots of 4x squared-x+9
Click here to see answer by Alan3354(69443)

Question 1117114: A ball is released from a height of 6 feet and reaches its maximum height of 26 feet 2 seconds after being released. How long is the ball in the air?
Click here to see answer by ikleyn(52781)

Question 1117082: A balloon, in the shape of a right circular cylinder, is being inflated in such a way that the radius and height are both increasing at the rate of 3 cm/s and 8 cm/s, respectively. What is the rate of change of total surface area when its radius and height are 60 cm and 140 cm, respectively?
Click here to see answer by addingup(3677)

Question 1117130: Two motorists, one traveling at 5 kph faster than the other, leave the same place at the same time and travel in opposite directions. Find the rate of each if they are 195 km apart after 3 hours.
Click here to see answer by ikleyn(52781)

Question 1117083: A baseball diamond has the shape of a square with sides 90 ft. long. A player 60 ft from second base is running towards third base at a speed 28 ft/min. At what rate is the players� distance from the home plate changing?
Click here to see answer by math_helper(2461)

Question 1117186: During a demonstrate game, Carmelo shot twice as many baskets as Mark. If their total number of baskets is 42 how many baskets did each one make?
Click here to see answer by math_helper(2461)

Question 1117084: A woman standing on a cliff is watching a motor boat through a telescope, s the boat approaches the shoreline directly below her. If the telescope is 25 m above the water level and if the boat is approaching the cliff at 20 m/s, what rate is the acute angle made by the telescope with the vertical changing when the boat is 250 m form the shore?
Click here to see answer by addingup(3677)

Question 1117206: fractions as multiples of unit fractions using models
1. 9/5
2. 8/3
Click here to see answer by Alan3354(69443)

Question 1117205: write the fraction as a multiple of a unit fraction: model fraction
6/2
Click here to see answer by ikleyn(52781)

Question 1117295: Need help translating word problem
Carlos began with twice as much money as David had.
After Carlos gave $12 to David, Carlos still had $10 more than David.
How much money did they have combined at the start
The correct answer is
Let x=the number of dollars David had to start
If Carlos started with twice as much money as David then Carlos started with 2x dollars. After Carlos gave David $12, Carlos had 2x-12 dollars and David had x + 12 dollars. If Carlos still had $10 more than David, then
2x - 12 = 10 + x +12
MY QUESTION:
If Carlos still had $10 more than David, why is it specified to the right of the equal sign in David�s expression?
Thanks in advance.

Click here to see answer by josgarithmetic(39617)

Question 1117370: Ineed ur help on binomials, plz plz I am dying!!
Click here to see answer by solver91311(24713)

Question 1117364: this is linear programming I am having hard time to understand each step :( pls help me I need to report this tomorrow it's a big help of yours. thank you very much!!!
After making various presentations to potential investors, MC has finally hit the jackpot. An investor wants to invest 100,000,000 pesos in MC.
After doing all your staff work in the previous weeks, the two of you have been tasked to find the most efficient way to invest the money. This involves making the highest profit possible from the money you have invested. You have decided to consult your friend Olivia, who is also a financial investor.
Olivia discusses that you need to use a mathematical method called Linear Programming to solve this problem. She explains that Linear Programming is a method that has to be set up very carefully. It involves creating a function to optimize and modelling various constraints using linear equations. She has decided to present you the profitability percentages of MC, given that she has already done prior work with MC.
The startup arm is projected to return at least 12%. To minimize risk, you must invest no more than 30,000,000 pesos. The financial stocks return 3%, while the retail arm returns 5%.
For tax reasons, you must invest at least 3 times more in the financial stocks than the retail arm.
Your task is to set up the linear program. You have to define the following:
The variables that will be used
The optimization function that will be used
What kind of optimization will be done: minimization or maximization?
The constraints that the linear program will be subjected to
The model will be presented to the MC CEO, who will verify if the model is satisfactory.

Click here to see answer by stanbon(75887)

Question 1117384: A local Computer City sells batteries ($3) and small boxes of pens ($4). In August, total sales were $912. Customers bought 4 times as many batteries as boxes of pens. How many of each did Computer City sell?
Click here to see answer by stanbon(75887)

Question 1117438: given the measures of three angles of a triangle .explain how to find the ratio of the lengths of two sides of the triangle.
(measures are not given ,we have to explain the method.question is from law of cosines.)

Click here to see answer by rothauserc(4718)

Question 1117448: A store ordered 700 candles at a total wholesale cost of $7550.99. The soy candles cost $12.89 each and the special candles cost $9.36 each. How many of each type was ordered?
I can not determine a formula to solve. Please help
Click here to see answer by josgarithmetic(39617)

Question 1117451: I know the answer for this question is $4 but don't know how they arrived at that answer. Can you help me through this?
Lola, Michael and Joaquin each want to buy a sundae.
But Lola is 4 dollars short, Michael is 3 dollars short, and Joaquin is 1 dollar short. Combined, they have exactly enough money to buy one sundae. How many dollars does one sundae cost?
Thanks in advance.

Click here to see answer by Edwin McCravy(20055)

Question 1117439: A pilot is flying from city A to city B,which is 85 miles due north after flying 20 miles ,the pilot must change course and fly 10 degree east of north to avoid a cloudbank.
a. if the pilot remains on this course for 20 miles how far will the plane be from city B.
b..how many degrees will the pilot have to turn to the left TO Fly directly to city B? how many degrees from due north is this course.
(question is from law of cosines)
Click here to see answer by solver91311(24713)

Question 1117470: Solve the simultaneous equations. 3x+4y=-3, x+y=1
Click here to see answer by josgarithmetic(39617)

Question 1117467: 100 dollar is placed into a saving account each month, the company pays 3% annual interest, compounded monthly. How much money, will you be having after one year.
How do you formulate the summation formula for this situation?
Click here to see answer by greenestamps(13200)

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