Recent Homework Questions About Algebra
A stock broker has $200,000 to invest in stocks and bonds. She wants to invest at least $100,000 in stocks and at least $50,000 in bonds. If stocks have an annual yield of 9% and bonds have an annual yield of 7% how much should she invest in each to maximize her income? Find ...
Thursday, July 17, 2014 at 5:33pm
Mio can build a large shed in 7 days less then yuuko can. If they build it together it would take them 12 days. How long would it take each of them working alone?
Thursday, July 17, 2014 at 3:50am
A sink can be filled by a pipe in 2 minutes but it takes 4 minutes to drain a full sink. if both the pipe and the drain are open, how long will it take to fill the sink?
Thursday, July 17, 2014 at 3:44am
The length of a side of a rectangle is 2 units less than a number, and the width is 4 units more than the length. Which of the following expressions represents the area of the rectangle, in square units? A. x^2+2x+4 B. x^2-2x+8 C. x^2-4 D. x^2+4
Wednesday, July 16, 2014 at 11:45pm
In a certain class there are 12 boys and 18 girls. If the class average for an algebra exam is 90 and the boys' average score is 87, what is the girls' average score?
Wednesday, July 16, 2014 at 7:58pm
A movie theater has 400 seats. Tickets at the theater cost $8 for students, $10 for adults, and $7 for senior citizens. On a night when all the seats were sold, the theater made $3,535 from ticket sales. If the number of adult tickets sold was 10 less than the number of ...
Wednesday, July 16, 2014 at 2:16pm
You are walking away from home at a constant velocity of 5 km per hour. The first landmark you see is your favorite fountain which happens to be 2 km from your house. Which of the following sequences describes the distances you cover at internals of one hour starting when you ...
Tuesday, July 15, 2014 at 12:21pm
Two different radioactive isotopes decay to 10% of their respective original amounts. Isotope A does this is 33 days, while isotope B does this in 43 days. What is the approximate difference in the half-lives of the isotopes? 3 days 10 days 13 days 33 days
Monday, July 14, 2014 at 9:37pm
Two different cars each depreciate to 60% of their respective original values. The first car depreciates at an annual rate of 10%. The second car depreciates at an annual rate of 15%. What is the approximate difference in the ages of the two cars? 1.7 ears 2.0 years 3.1 years ...
Monday, July 14, 2014 at 8:47pm
Please help me solve this: If an object is projected upward with an initial velocity of 112 feet per second from a height h of 128 feet, then its height t seconds after it is projected is defined by the equation h=-16t^2 + 112t + 128. How many seconds after it is projected ...
Monday, July 14, 2014 at 3:33pm
When asked to solve the rational equation 11/2x^2+x-15=5/2x-5-x/x+3 a student multiplied both sides of the equation by the expression (2x2+x−15)(2x−5)(x+3). Was this the best thing for the student to do? If not, what should the student have done?
Sunday, July 13, 2014 at 1:55pm
Given 25x^2 - 10x = 0, which values of x will satisfy the equation? (Hint: Factor the polynomial into two terms, and find the values of x that will make each term 0.) A. x = 0 and x = 5/2 B. x = 0 and x = 2/5 C. x = 0 and x = 2 D. x = 0 and x = 5
Saturday, July 12, 2014 at 10:27pm
Given 25^2-10x=0, which values of x will satisfy the equation? (Hint: Factor the polynomial into two terms, and find the values of x that will make each term 0.)
Saturday, July 12, 2014 at 10:26pm
The value, V, of Kalanis stock investments over a time period, x, can be determined using the equation V=75-(0.80)^-x What is the rate of increase or decrease associated with this account?
Friday, July 11, 2014 at 11:10pm
A business owner opens one store in town A. The equation p(x)=10,000(1.075)^t represents the anticipated profit after t years. The business owner opens a store in town B six months later and predicts the profit from that store to increase at the same rate. Assume that the ...
Friday, July 11, 2014 at 10:52pm
solve the following systwm graphically. Be sure to check your solution. if the system has an infinite number of solutions, use set-builder notation to write no solution, state this. 4y=x+8, x=2/3y+2
Wednesday, July 9, 2014 at 7:37pm
A student is asked to solve b2 + a2 = c2 for a and gives the following solution. Assume all variables represent positive Real Numbers. b2 + a2 = c2 pb2 + a2 = pc2 b + a = c a = c-b Explain the mistake(s) made by the student and provide the correct solution.
Wednesday, July 9, 2014 at 4:07pm
find two numbers such that if 7 is added to the greater the answer is four times the smaller number, while 28 added to the smaller number is equal to twice the greater number.
Wednesday, July 9, 2014 at 8:47am
If you multiply a trinomial by a monomial, what type of polynomial will the product be? A. a monomial B. a binomial C. a trinomial D. it is not possible to determine
Tuesday, July 8, 2014 at 10:53pm
I am trying to solve the following using the Quadratic Formula but I am confused. Can you explain the steps? Solve (find all complex-number solutions): t^2 + 3 = 6t Thank you
Tuesday, July 8, 2014 at 9:46pm
Two boys are throwing a baseball back and forth. The ball is 4 ft above the ground when it leaves one childs hand with an upward velocity of 36 ft/s. If acceleration due to gravity is 16 ft/s2, how high above the ground is the ball 2 s after it is thrown? h(t)=at^2...
Tuesday, July 8, 2014 at 6:27pm
A rectangular swimming pool that is 10 ft wide by 16 ft long is surrounded by a cement sidewalk of uniform width. If the area of the sidewalk is 155 ft2, what is its width? A=lw 2.5ft 5.0ft 6.2ft or 15.5ft
Tuesday, July 8, 2014 at 6:24pm
Give the degree and classify the polynomial by the number of terms. A. degree: 2; trinomial B. degree: 3; binomial C. degree: 3; trinomial D. degree: 2; binomial Is B correct?
Monday, July 7, 2014 at 10:55pm
The height of an object after it is released can be modeled by the function f(t)=-16t^2+vt+s, where t is the n? The height of an object after it is released can be modeled by the function f(t)=-16t^2+vt+s, where t is the number of seconds after the object is released, v is the...
Monday, July 7, 2014 at 10:38pm
Myra uses an inverse variation function to model the data for the ordered pairs below. (2, 30), (3, 20), (4, 15), (5, 12), (6, 10) Which statement best explains whether an inverse variation function is the best model for the data? An inverse function is the best model because ...
Monday, July 7, 2014 at 10:11pm
Jordan uses a linear equation to model the data in a table. Which reasoning might Jordan have used in the decision to model the data with a linear equation? The products of corresponding x- and y-values are equal. The ratios of consecutive y-values are equal for evenly spaced ...
Monday, July 7, 2014 at 10:09pm
Tasha invests $5,000 annually at 6% and $5,000 annually at 8%. Thomas invests $10,000 annually at 7%. Which statement accurately compares the two investments if interest is compounded annually?
Monday, July 7, 2014 at 9:27pm
A toy rocket that is shot in the air with an upward velocity of 48 feet per second can be modeled by the function f(t)=-16t^2+48t , where t is the time in seconds since the rocket was shot and f(t) is the rockets height. What is the maximum height the rocket reaches? ...
Monday, July 7, 2014 at 9:23pm
x: 0, 2, 4, 6 ,8 y: 1, 49, 2401, 117,649 How do the y-values in the table grow? A. The y-values increase by a factor of 49 for each x increase of 1. B. The y-values increase by 49 for each x increase of 1. C. The y-values increase by a factor of 7 for each x increase of 1. D. ...
Sunday, July 6, 2014 at 8:18pm
A lab assistant wants to make 5 liters of 27.2% acid solution. If solutions of 30% and 16% are in stock, how many liters of each must be mixed to prepare the solution?
Saturday, July 5, 2014 at 10:26am
Evan washes two types of vehicles. It takes him 30 minutes to wash a car and 40 minutes to wash a truck. He charges $12 to wash a car and $15 to wash a truck. In 270 minutes, Evan made $105 washing cars and trucks. How many trucks did Evan wash?
Friday, July 4, 2014 at 7:05pm
A chicken farm orders bags of feed from two farmers. Store X charges $20 per bag, and store Y charges $15 per bag. The farm must obtain at least 60 bags per week to care for the chickens properly. Store Y can provide a maximum of 40 bags per week, and the farm has committed to...
Friday, July 4, 2014 at 5:34pm
The vertex of a parabola is at (-2,4), and the x-intercepts are at -6 and 2. Determine the domain and range of the function. a. D: all real numbers R: all real numbers b. D: all real numbers R: y ≤ 4 c. D: -6 ≤ x ≤ 2 R: y ≤ 4 d. D: x ≤ 4 R: all ...
Friday, July 4, 2014 at 12:17pm
All parabolas are symmetric with respect to a line called the axis of symmetry. A parabola intersects its axis of symmetry at what point? a. vertex b. function c. translation d. y-intercept Is it A. vertex?
Friday, July 4, 2014 at 12:01pm
Which of the following is not a step in graphing a quadratic function? A. Find the equation for the axis of symmetry. B. Find the slope. C. Find the coordinates for the vertex. D. Plug in values for x around the vertex to get values of y Is B correct?
Thursday, July 3, 2014 at 10:38pm
A sports memorabilia store makes $6 profit on each football it sells and $5.50 profit on each baseball it sells. In a typical month, it sells between 35 and 45 footballs and between 40 and 55 baseballs. The store has no more than 80 footballs and baseballs in stock during the ...
Thursday, July 3, 2014 at 8:35pm
Joylin receives a $50 gift card for the local movie theater for her birthday. She uses the card to purchase tickets and snacks for her family. If Joylin spends $6 more on tickets than she does on snacks, how much does Joylin spend on tickets?
Thursday, July 3, 2014 at 7:19pm
A nontoxic wood furniture polish can be made by mixing mineral(or olive)oil with vinegar. To make a 16-oz batch for a squirt bottle, Michael uses an amount of mineral oil that is 4oz more than twice the amount of vinegar. How much of each ingredient is required?
Thursday, July 3, 2014 at 10:01am
The dimensions of a page are 12 in. by 10 in. and it is supposed to contain 80in2 of the printed region. What should the margin be if all the margins are the same?
Wednesday, July 2, 2014 at 7:17pm
This is giving me a lot of trouble. Factoring Differences of Squares Factor Completely 98-8w^2 and can you explain how you got the common factor if there is one please
Wednesday, July 2, 2014 at 4:28pm
What are two equations that model the data? What are the domain and range of each equation? Month|Sales 2 | 3 4 | 5 6 | 4 8 | 6 10 | 5 12 | 12 14 | 16 16 | 22 18 | 26 20 | 32 I am very confused about how to do this question.
Wednesday, July 2, 2014 at 1:21pm
The product of 3 consecutive integers decreased by the cube of the first is 85. Wahat are the integers? THE GIVEN EQUATION IS: (x)(x+1)(x+2)-xcube = 85 How can i solve this ?
Wednesday, July 2, 2014 at 1:12am
Evan is making a table that will be created in the shape of the figure below. The table top is a triangle attached to a rectangle. To purchase the right amount of paint, he needs to know the area of the table top. He can only spend $10 on paint, which is enough to cover 150 ...
Tuesday, July 1, 2014 at 11:01am
The debate team has m members. Each member sold 20 coupon books as a fundraiser. Write a variable expression that shows the number of coupon books the club sold.
Tuesday, July 1, 2014 at 9:48am
Fiber-optic cables are used widely for internet wiring, data transmission, and surgeries. When light passes through a fiber-optic cable, its intensity decreases with the increase in the length of the cable. If 1500 lumens of light enters the cable, the intensity of light ...
Monday, June 30, 2014 at 8:37pm
An Algebra I test contains 40 questions. Some of the questions are worth 4 points each, and some are worth 2 points each. The total test is worth 100 points. Let f represent the number of questions worth 4 points and t, the number of questions worth 2 points. Which equation ...
Monday, June 30, 2014 at 5:17pm
Mary creates a table of values for a function and plots the points. She finds that the difference in the y values is the same. What kind of function did she graph? How can you tell if a graph is linear, quadratic, exponential or square root?
Saturday, June 28, 2014 at 10:27pm
Which of the following statements is the best description of exponential decay? A. Exponential behavior occurs when a function increases at a rate of increasing value. B. Exponential behavior occurs when a function increases at a rate of decreasing value. C. Exponential ...
Friday, June 27, 2014 at 9:38pm
Which of the following is an example of exponential growth or decay? A. a colony of bacteria staying constant in quantity each week B. a colony of bacteria doubling in quantity each week C. a colony of bacteria increasing by 100 in quantity each week D. a colony of bacteria ...
Friday, June 27, 2014 at 9:37pm
Fiona invested $1000 at 8% compounded continuously. At the same time Maria invested $1100 at 8% compounded daily. How long will it take for their investments to be equal in value? Assume there are 365 days in every year. Please help I have tried everything and cannot solve ...
Friday, June 27, 2014 at 3:53pm