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November 22, 2014

Homework Help: Math: Algebra

Recent Homework Questions About Algebra

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algebra
simplify the expression show your work 3x(4x^4-5x)
Saturday, November 22, 2014 at 1:15am

algebra
You deposit $3000 in an account earning 7% interest compounded continuously. The amount of money in the account after years is given by A(t)=3000 e^(0.07 t) . How much will you have in the account in 5 years? $ Round your answer to 2 decimal places. How long will it be until ...
Saturday, November 22, 2014 at 12:47am

Algebra
At the beginning of each year, Joe invests $10,000 in his retirement fund. The fund gives 10% interestm compouned annually. At the end of the third year, how much money will be in Joe's fund?
Friday, November 21, 2014 at 8:56pm

Algebra
What is the range of the function f(x)=3-2*51^x? Give your answer as an interval.
Friday, November 21, 2014 at 8:25pm

Algebra Help please!
I already posted this question,and Henrey answered it. I just wanted to clarify a few things to make sure I am on the right track Problem: Joanie takes a $6,000 loan to pay for her car. The annual interest reate on the loan is 12%. She makes no payments for 4 years, but has to...
Friday, November 21, 2014 at 8:08pm

Algebra 2
More About Complex Numbers squ. root 5+i/squ. root 5-i I don't know if you understand this equation, but could you help me.
Friday, November 21, 2014 at 7:03pm

Algebra 2
Solving Quadratic Systems x^2+y^2=10 2x+y=4 Please show work I need to know how to do it
Friday, November 21, 2014 at 6:20pm

Algebra 2
Solving Quadratic System y=4x+1 2x-y+1 Please show work!!!
Friday, November 21, 2014 at 5:39pm

Algebra 2
Solving Quadratic Systems x+2y=4 3x-y=5 Please show work!!!
Friday, November 21, 2014 at 5:38pm

algebra 2
12x^2-2x-2=0
Friday, November 21, 2014 at 5:23pm

Algebra
y=25x+500 solve for x solve for y
Friday, November 21, 2014 at 2:54pm

algebra
The stopping distance s of a car varies directly as the square of its speed v. If a car traveling at 30 mph requires 81 ft to stop, find the stopping distance for a car traveling at 55 mph.
Friday, November 21, 2014 at 2:46pm

algebra
Which of the following points lies on the circle whose center is at the origin and whose radius is 10 (-6,4) (/10,/10) (6,-8)
Friday, November 21, 2014 at 1:17pm

algebra
The length of a rectangle is 3 more than twice the width. The area of the rectangle is 119 square inches. What are the dimensions of the rectangle? If x = the width of the rectangle, which of the following equations is used in the process of solving this problem?
Friday, November 21, 2014 at 1:10pm

algebra
Solve this quadratic equation x^2 + 5x + 3 = 0
Friday, November 21, 2014 at 11:09am

college algebra
An investment initially worth $5300 earns 7.7% annual interest, and an investment initially worth $8000 earns 5.6% annual interest, both compounded annually. How long will it take for the smaller investment to catch up with the larger one?
Friday, November 21, 2014 at 2:25am

algebra 2
Simplify. 1.) 2•√25/26 2.) √a^2/b^5 3.) √a/b √a^2/b^2
Friday, November 21, 2014 at 12:17am

Algebra II
I have some questions regarding syntheetic division. f(x) = x3 - 9x + 3
Friday, November 21, 2014 at 12:08am

algebra
How do you find the unit rate for ....861 bagels divided by 3 days
Thursday, November 20, 2014 at 11:55pm

Algebra
If $31,500 is invested at 6.8% for 30 years, find the future value if the interest is compounded daily
Thursday, November 20, 2014 at 11:14pm

algebra
Express f(x) in the form f(x)=(x-k)q(x)+r for the given value of k. f(x)=x^3 +6x^2 +10x+4,k=-2 Is f(x) =0 ?
Thursday, November 20, 2014 at 9:15pm

college algebra
A rectangle picture frame has a perimeter of 1800 centimeters and a width that is 300 less than its length. Find the area of the picture.
Thursday, November 20, 2014 at 8:49pm

Algebra
Kimberly borrows 1000 dollars from Lucy,who charged interest of 5% per month ( which compounds monthly). What is the least integer number of months after which Kimberly will owe more than twice as much as she borrowed.
Thursday, November 20, 2014 at 8:43pm

algebra. help!
Find the slope of a line that passes through (-2,-3) and (1,1). a. 1/3 b. 1 c. 2 d. 4/3 For the equation -4y=8x, what is the constant of variation? a. -4 b. -2 c. 1 d. 2 Suppose y varies directly with x, and y=24 when x=8. What is the value of y when x=10 a. 10 b. 30 c. 80 d.240
Thursday, November 20, 2014 at 7:17pm

Pre Algebra
Chad jogs 4 2\5 miles in 1\2 hour. What is his average speed in miles per hour?
Thursday, November 20, 2014 at 6:45pm

Math Pre-Algebra
Simplify the Expression(-8/15)+(1/15). Show how to simplify in steps, using a property of operations for each step. Explain the property you use in each step. Can you help me please?
Thursday, November 20, 2014 at 6:39pm

Algebra
Kimberly borrows 1000 dollars from Lucy,who charged interest of 5% per month ( which compounds monthly). What is the least integer number of months after which Kimberly will owe more than twice as much as she borrowed?
Thursday, November 20, 2014 at 6:35pm

Algebra
Solve for x, when (2^(x+1))^3*4^x=8192
Thursday, November 20, 2014 at 6:33pm

algebra
Ken is Helen and John's father, his age is 14 years more than Helens and John's combined if Helen's age is x and John's is x+4 what age is men in terms of x
Thursday, November 20, 2014 at 2:54pm

Algebra
Is 2000(1+0.05)^18=4183.24?
Thursday, November 20, 2014 at 11:32am

Algebra Help
Solve equation ln x = -4x
Thursday, November 20, 2014 at 10:32am

Math
I need help on how to explain to my 5th grader how to come up with an algebra equation from a word problem. Any suggestions? Example: Gerry had a total of 30 pens and pencils. He decided to trade with his friends all his pens for pencils. If he traded every pen for 2 pencils ...
Thursday, November 20, 2014 at 8:07am

Algebra please help
1 hour= 3,600 seconds and 1 mile=5,280 feet. Make a conjecture about how you would convert a speed of 15 miles per hour to feet per second. Then convert. Please help answer thx
Thursday, November 20, 2014 at 6:54am

algebra
what is the graph of the system ?y<-x-1 y>x+4
Wednesday, November 19, 2014 at 11:04pm

algebra
To take a taxi in downtown, it will cost you $3.00 to go a mile. After 6 miles, it will cost $5.25. The cost varies linearly with the distance traveled. Write the equation expressing cost (c) in terms of miles (d) traveled.
Wednesday, November 19, 2014 at 10:35pm

Algebra, help please!!!
The youngest person in the company is 21. The oldest is 66. A: What is the range? B: Is the range a good measure of spread for the ages in the company? Why?
Wednesday, November 19, 2014 at 9:34pm

Algebra, help please!!!
Find the mean and the median in the following arithmetic sequences: A: 1, 3, 5, 7, 9 B: 1, 3, 5, 7, 9, . . . ., 199 C: 7, 10, 13, 16, . . ., 607
Wednesday, November 19, 2014 at 9:26pm

Algebra
I already posted this question, I just wanted to clarify my answer. Problem: When Frederick was born, his grandparents gave hime a gift of $2000, which was invested at an interest rate of 5% per year, compounded yearly. How much money will Frederick have when he collects the ...
Wednesday, November 19, 2014 at 9:02pm

algebra 2
find the domain y=-ãx-5 +3
Wednesday, November 19, 2014 at 7:58pm

Algebra
Gerry had a total of 30 pens and pencils. He decided to trade with his friends all of his pens and pencils. If he traded every pen for 2 pencils, he would have 48 pencils in all. How many pens and how many pencils did he have before the trade?
Wednesday, November 19, 2014 at 7:54pm

Algebra
The income from a student production was $15,000. The price of a student ticket was $3, and nonstudent tickets were sold at $5 each. Four thousand tickets were sold. How many tickets of each kind were sold?
Wednesday, November 19, 2014 at 7:50pm

Algebra
Solve for x, when (2^(x+1)^3)*4^x=8192.
Wednesday, November 19, 2014 at 7:26pm

algebra
Mindy picked 4 times as many daisies as tulips for a flower bouquet. She picked a total of 20 flowers. How many more daisies than tulips did she pick?
Wednesday, November 19, 2014 at 7:14pm

Algebra 2
let f(x)=7x+4 and g(x)= 3x-9 g(f(x))
Wednesday, November 19, 2014 at 6:58pm

Algebra
Given that 2^x+2^x+2^x+2^x=512, what is the value of x? I think it simpliflies to 2^4x=512. and 2^9=512 but to get 9 you have to mulitply something to 4, but its 2.25 is that right?
Wednesday, November 19, 2014 at 6:49pm

Algebra Two
let f(x)=7x+4 and g(x)= 3x-9 f(x)*g(x)
Wednesday, November 19, 2014 at 6:42pm

algebra 1
how do i solve -4x-2y=-12 and 4x+8y=-24 using the elimination method?
Wednesday, November 19, 2014 at 6:31pm

Algebra
If an apartment complex will need painting in 3 1/2 years and the job will cost $45,000, what amount needs to be deposited into an account now in order to have the necessary funds? The account pays 12% interest compounded semiannually.
Wednesday, November 19, 2014 at 6:16pm

Algebra 2
Simplify 2x*x^7/4
Wednesday, November 19, 2014 at 6:10pm

Algebra
One hour = 3,600 seconds and 1 mile= 5,280 feet. MAke a conjecture about how you could convert a speed of 15 miles per hour to feet per second. Then convert please help answer
Wednesday, November 19, 2014 at 5:44pm

Algebra
What is the result if you multiply a number of cups by 8 fl oz/ 1 cup and then multiply the result by 1 cup/ 8 fl oz? Give an example thx
Wednesday, November 19, 2014 at 5:40pm

Algebra help
A class 4 truck weighs between 14,000 and 16,000 pounds. What is the weight range in tons? b. If the weight of. Class 4 truck is increased by 2 tons, will it still be classified as a class 4 truck? Explain both thanks
Wednesday, November 19, 2014 at 5:28pm

Algebra please help out
How would you convert 5 feet 6 inches to inches?
Wednesday, November 19, 2014 at 5:25pm

Algebra please help out
In Beijing in 2008, the women's 3,000 meter steeplechase became an Olympic event. What is this distance in kilometers? Please help answer thx
Wednesday, November 19, 2014 at 5:24pm

Algebra
When Frederick was born, his grandparents gave hime a gift of $2000, which was invested at an interest rate of 5% per year, compounded yearly. How much money will Frederick have when he collects the money at the age of 18? gGive your answer to the nearest hundreth of a dollar.
Wednesday, November 19, 2014 at 4:12pm

Algebra
Solve for x: (1/25)^x+2=125^-x
Wednesday, November 19, 2014 at 4:08pm

Algebra
Solve the inequality 1. m - 7 < 6 2. x + 4.5 more than or equal to 5.5 3.p + 12 > 9 4. Translate the following statement into an inequality: Five less than a number is at least nine. x - 5 more than or equal to 9 Show me how you did the work please?
Wednesday, November 19, 2014 at 4:05pm

Algebra Help! Please
Ok so I did what you told me reiny but I cant figure out number three which is here 10x - 2 - 6x = 3x - 2 + x Please show how You did it please?
Wednesday, November 19, 2014 at 2:56pm

ALGEBRA Help Please
Decide whether each equation has one solution, no solution or infinitely many solutions 2(x - 3) = 2x 3(y - 3) = 2y - 9 + y 10x - 2 - 6x = 3x - 2 + x 4(x + 3) + 2x = x - 8 Please Show how you did it if possible please thanks! :)
Wednesday, November 19, 2014 at 2:14pm

Algebra
A kite is tied to the ground. The rays from the sun hit the kite perpendicular to the kite string, casting a shadow of the kite on the ground. The coordinates in the diagram are given in feet. What is the distance from where the kite is tied to the shadow? Coordinates are (3,...
Wednesday, November 19, 2014 at 12:15pm

algebra
Monigue and Tasha are traveling on the same highway to family reunion at a park. Monique starts out 225 miles from the park and drives 70 miles per hour. Tasha starts out 200 miles from the park and drives 65 per hour. Write an equation for Monique`s where y is the total ...
Tuesday, November 18, 2014 at 7:31pm

Algebra please help out
If the number in the numerator of a unit rate is 1, what does this indicate about the equivalent unit rates? Please help answer and give an example. Thanks
Tuesday, November 18, 2014 at 7:28pm

Algebra please help out
Jason watched a caterpillar move 10 feet in 2 minutes. Jason says that the caterpillars unite rate is 0.2 feet per minute. Is jason correct. Please explain. Thanks
Tuesday, November 18, 2014 at 7:21pm

Algebra 2
More About Complex Numbers Multiply (4+3i)(1-i) Please show work i need help
Tuesday, November 18, 2014 at 7:19pm

Algebra
A machine can produce 27 inches every 3 minutes. How many feet of ribbon can the machine make in one hour? Explain
Tuesday, November 18, 2014 at 7:03pm

Algebra 2
More About Complex Numbers Find the reciprocal. -1-i 2i
Tuesday, November 18, 2014 at 6:50pm

Algebra 2
More About Complex Numbers Find the conjugate of each number. 1.)squ root of 3-7/8i 2.) 2-mi 3.) 6 Please show work I need help
Tuesday, November 18, 2014 at 6:49pm

Algebra 2
More About Complex Numbers Multiply (4+3i)(1-i) Please show work i need help
Tuesday, November 18, 2014 at 6:45pm

Algebra
Rachel sent or received 10,290 text messages in the month of September. If each text message over the first 150 messages cost 8 cents, what was her texting bill? $126,750 Explain how you got your answer. I subtracted 10,290 by 150 then I divided 10,140 by 0.08 and I got 126,...
Tuesday, November 18, 2014 at 6:43pm

Algebra 2
More About Complex Numbers: Solve x and y 4x+5y+13i=7+(6x+5y)i Please show work because I had a hard time finding the answer
Tuesday, November 18, 2014 at 6:43pm

algebra
The monthly income I, in dollars, from a new product is given by I(t) = 81000 − 45000e^-0.005t where t is the time, in months, since the product was first put on the market. (Round your answers to the nearest dollar amount.) (a) What was the monthly income after the 30th...
Tuesday, November 18, 2014 at 6:38pm

algebra
Lead shielding is used to contain radiation. The percentage of a certain radiation that can penetrate x millimeters of lead shielding is given by I(x) = 100e^−1.5x. What percentage of radiation, to the nearest tenth of a percent, will penetrate a lead shield that is 1 ...
Tuesday, November 18, 2014 at 6:37pm

algebra
Solve for x and x+2y=10 3x-y=9
Tuesday, November 18, 2014 at 5:43pm

algebra
what is one fourth of thirteen?
Tuesday, November 18, 2014 at 5:07pm

Algebra
The heat generated by a stove element varies directly as the square of the voltage and inversely as the resistance. If the voltage remains constant, what needs to be done to triple the amount of heat generated? I need to know why this makes sense or not.
Tuesday, November 18, 2014 at 3:22pm

Algebra
The Hubble Space Telescope can see stars and galaxies where brightness is 1/50 of the faintest objects now observable using ground-based telescopes. Use the fact that the brightness of a point source, such as a star, varies inversely as the square of its distance from an ...
Tuesday, November 18, 2014 at 3:21pm

Algebra
In a hurricane, the wind pressure varies directly as the square of the wind velocity. If wind pressure is a measure of a hurricane’s destructive capacity, what happens to this destructive power when the wind speed doubles? Do you have an equation to prove if this makes ...
Tuesday, November 18, 2014 at 3:16pm

algebra 1
cube root of (-64x^8y^5) Is it -8x^2y times the cube of y^2?
Tuesday, November 18, 2014 at 1:49pm

algebra 1
cube root of (-64x^8y^5)
Tuesday, November 18, 2014 at 1:46pm

Algebra Help
Last one 3(x - 4) = 5(x + 2) Please show how you did it
Tuesday, November 18, 2014 at 1:09pm

Algebra Help
8x – 3 = 15x + 18 x = –3 x = 3 x = 2.1 x = .9 Can you show how you did it please?
Tuesday, November 18, 2014 at 12:31pm

algebra
Jena and Cindy, Working together can clean the house in 10 hours. Working alone, cindy takes twice as long as jena. How longs does it take jena to clean the house.
Tuesday, November 18, 2014 at 11:57am

algebra
A car rents for 30.00 per day plus 19 cent per mile. You are on a daily budget of 87.00. What mileage will allow you to stay within your budget
Tuesday, November 18, 2014 at 10:52am

algebra worksheet help please
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 1,500 lumens of light enter the cable, the intensity of light ...
Monday, November 17, 2014 at 9:54pm

algebra
If a car traveling at 50 mph requires 170 ft to stop, find the stopping distance for a car traveling at v2 = 60 mph.
Monday, November 17, 2014 at 9:43pm

Algebra - rate of change help
The price of products may increase due to inflation and decrease due to depreciation. David is studying the change in the price of two products, A and B, over time. The price f(x) in dollars, of product A after x years is represented by the function below. f(x)=0.69(1.03)^x 1....
Monday, November 17, 2014 at 8:40pm

Algebra - quick question
What is the average rate of change formula for exponential growth functions?
Monday, November 17, 2014 at 8:31pm

Algebra - Can you PLEASE check - I"m stuck!
Bob is studying the growth of a particular species of plant. He writes the following equation to show the height of the plant f(n), in cm, after n days: F(N)=10(1.02)^n 1. Starting from 0 days, plug x-values into our function to find out how many days it takes for the plant to...
Monday, November 17, 2014 at 8:24pm

Algebra - can you PLEASE double check my work?
Part A: Use the properties of exponents to explain why is called the fifth root of 18. 1. What property refers to roots and fractional powers? My Answer: Rule of exponents 2. How does it apply to 18^1/5? If you multiply 18^1/5 by itself 5 times, you get 18. Part B: The length ...
Monday, November 17, 2014 at 8:18pm

Algebra
The number of bass in a lake is given by P(t) = 2800/1 + 6e^−0.05t where t is the number of months that have passed since the lake was stocked with bass. (a) How many bass were in the lake immediately after it was stocked? 400 bass (b) How many bass were in the lake 1 ...
Monday, November 17, 2014 at 7:50pm

algebra
When Charlotte planted her tomato plant, it grew 3 inches in one week. After 5 weeks, the tomato plant was 23 inches tall. Assume the relationship is linear. Find and interpret the rate of change and the initial value.
Monday, November 17, 2014 at 6:53pm

algebra
The number of bass in a lake is given by P(t) = 2800/1+6e^-0.05t where t is the number of months that have passed since the lake was stocked with bass. (a) How many bass were in the lake immediately after it was stocked? ? bass (b) How many bass were in the lake 1 year after ...
Monday, November 17, 2014 at 6:37pm

algebra
A cup of coffee is heated to 180°F and placed in a room that maintains a temperature of 65°F. The temperature of the coffee after t minutes is given by T(t) = 65 + 115e^−0.042t.(a) Find the temperature, to the nearest degree, of the coffee 10 minutes after it is ...
Monday, November 17, 2014 at 5:25pm

algebra
Lead shielding is used to contain radiation. The percentage of a certain radiation that can penetrate x millimeters of lead shielding is given by I(x) = 100e^−1.5x. What percentage of radiation, to the nearest tenth of a percent, will penetrate a lead shield that is 1 ...
Monday, November 17, 2014 at 4:45pm

algebra
The monthly income I, in dollars, from a new product is given by I(t) = 81000 − 45000e^-0.005t where t is the time, in months, since the product was first put on the market. (Round your answers to the nearest dollar amount.) (a) What was the monthly income after the 30th...
Monday, November 17, 2014 at 4:44pm

algebra
The function A(t) = 200e^-0.014t gives the amount of medication, in milligrams, in a patient's bloodstream t minutes after the medication has been injected into the patient's bloodstream. (a) Find the amount of medication, to the nearest milligram, in the patient's...
Monday, November 17, 2014 at 4:42pm

english
Elnora unlocked the case, took out the pail, put the napkin in it, pulled the ribbon from her hair, binding it down tightly again and followed to the road. From afar she could see her mother in the doorway. She blinked her eyes, and tried to smile as she answered Wesley ...
Monday, November 17, 2014 at 4:13pm

algebra
The expression 3x² represents
Monday, November 17, 2014 at 3:59pm

Algebra
Write the simplest polynomial function with zeros five and -4. K(x) = x^2 - x - 20?
Monday, November 17, 2014 at 3:01pm

Algebra Work Check
Find the roots of x^4 - 16 = 0. √ x^4 = √ 16 x^2 = 4 √ x^2 = ± √ 4 2,-2
Monday, November 17, 2014 at 1:49pm

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