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February 28, 2015

Homework Help: Math: Algebra

Recent Homework Questions About Algebra

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algebra
A plane leaves Chicago headed for LA at 540 mph. One hour later, a second plane leaves LA headed for Chicago at 660 mph. If the air route from Chicago to LA is 1800 miles, how long will it take for the first plane to pass the second plane? How far from Chicago will they be at ...
Monday, September 15, 2014 at 1:33pm

algebra
A triangle has a perimeter of 161 miles. The length of each of the two shorter sides of the triangle is two thirds the length of the longest side. Find the length of each side of the triangle.
Monday, September 15, 2014 at 12:56pm

algebra
Three people decide to share the cost of a yacht. By bringing in an additional partner, they can reduce the cost to each person by $4000. What is the total cost of the yacht?
Monday, September 15, 2014 at 12:54pm

college algebra
An executive invests $29,000, some at 8% and some at 4% annual interest. If he receives an annual return of $1,680, how much is invested at each rate?
Monday, September 15, 2014 at 12:19pm

Algebra 2
Reed has $6.20 in nickels and quarters. If the nickels were quarters and the quarters were nickels, he would have $3.50 more. How many quarters does Reed have?
Monday, September 15, 2014 at 11:44am

algebra
1. 5/13t = -9 2. 6 = x + 2/3 3. 13 + w/y = -18 4. 17 = -13 - 8x
Monday, September 15, 2014 at 11:36am

Algebra
Okay, so! I figured out how to get the Point-slope form to the question I was given which led me to y+3 =-2(x+1), but, now I'm stick on finding the Slope Intercept form to get my answer. Can someone help me? Thanks!
Monday, September 15, 2014 at 7:42am

Algebra 1
How do you solve this? Thanks! y+3 = -2(x+1)
Sunday, September 14, 2014 at 11:15pm

Algebra
What would the inequality c + 7 less then or equals 3 look like on a graph?
Sunday, September 14, 2014 at 9:52pm

algebra
Find the standard form for the equation of a circle (x−h)^2+(y−k)^2=r^2 with a diameter that has endpoints (−8,−10) and (5,−4). Find the h= -1.5 k= -7 r=? I do not understand how to find the radius.
Sunday, September 14, 2014 at 9:00pm

algebra
Find the center and radius of the circle whose equation is 5x^2−6x+5y^2+8y−9=0.
Sunday, September 14, 2014 at 8:51pm

algebra
Find the domain and range of: F(x)=sqrt(x)+16
Sunday, September 14, 2014 at 8:49pm

Algebra
A manufacturer of tin cans wishes to construct a right circular cylindrical can of height 20 centimeters and capacity 2600 cm^3 (see the figure). Find the inner radius r of the can. (Round your answer to one decimal place.) r = cm
Sunday, September 14, 2014 at 8:30pm

Algebra
The speed of the current in a stream is 4 mi/hr. It takes a canoeist 96 minutes longer to paddle 13 miles upstream than to paddle the same distance downstream. What is the canoeist's rate in still water?
Sunday, September 14, 2014 at 8:28pm

Algebra
What inequality represents the verbal expression all real numbers less then 69? My answer is x<69
Sunday, September 14, 2014 at 8:26pm

Algebra
Students were divided into eight teams with nine on each team. Later, the same students were divided into teams with six on each team. How many teams were there then? Explain how.
Sunday, September 14, 2014 at 6:36pm

Algebra 1
How do you write the equation of the line with slope -2 that passes through the point (-1, -3) in slope-intercept form? Thanks to anyone that helps! :)
Sunday, September 14, 2014 at 6:03pm

algebra
x2 = −x + 1
Sunday, September 14, 2014 at 4:33pm

algebra
(z − 1)^2 + 4 = 0
Sunday, September 14, 2014 at 4:33pm

algebra
A company has determined that the profit, in dollars, it can expect from the manufacture and sale of tennis racquets is given by P = −0.01x^2 + 130x − 180,000. How many racquets should the company manufacture and sell to earn a profit of $174,900? (Enter your ...
Sunday, September 14, 2014 at 4:32pm

algebra
A model rocket is launched upward with an initial velocity of 200 feet per second. The height, in feet, of the rocket t seconds after the launch is given by h = −16t2 + 200t. How many seconds after the launch will the rocket be 380 feet above the ground? Round to the ...
Sunday, September 14, 2014 at 4:31pm

Algebra 1
How do you write the equation of the line with slope -2 that passes through the point (-1, -3) in slope-intercept form? Thanks to anyone that helps! :)
Sunday, September 14, 2014 at 2:11pm

Math
What is the answer to page 31 of pre-algebra with pizzazz (what do hair dressers do?) ?
Sunday, September 14, 2014 at 11:27am

Algebra
A motorboat left a harbor and traveled to an island at an average rate of 18 knots. The average speed on the return trip was 10 knots. If the total trip took 14.0 hours, how far is the harbor from the island?
Sunday, September 14, 2014 at 10:34am

Algebra 1
evaluate -3 - (-4)= ?? Please help
Saturday, September 13, 2014 at 9:46pm

Pre-Algebra
What is 1/8 - 3/5? 1/8 - 3/5 = 5/40 - 24/40 = 19/40
Saturday, September 13, 2014 at 6:22pm

Algebra
Determine the value or values of d that complete the square for the expression. (Enter your answers as a comma-separated list. If there is no solution, enter NO SOLUTION.) (a) x^2 + 7x + d d = b) x^2 − 18x + d d = (c) x^2 + dx + 64 d = (d) x^2 + dx + 49/4 d =
Saturday, September 13, 2014 at 2:38pm

HELP!! Algebra
Fill in the missing number: A: 4_4*327= 3_88 B: 968 452__= 1582_8?
Saturday, September 13, 2014 at 1:27pm

Algebra
solve and show steps 6=x+2/3
Saturday, September 13, 2014 at 12:07pm

Algebra
3(x-7)-x= 2x-21 Does this equation have infinitely many solutions My answer is yes.
Saturday, September 13, 2014 at 11:46am

Algebra
4y+8=6y+3 Is the expression true,false,or open? My answer is true = 5/2
Saturday, September 13, 2014 at 11:16am

Algebra
Pick a number. Double it. Multiply the result by 3. Add 24. Divide by 6. Subtract your original number. Is the result always the same? Write a convincing argument for what happens. HELP!
Friday, September 12, 2014 at 11:18pm

Algebra
The cost of purchasing x meter lengths of a certain rope is: C=1/5x^2-8x+100 per rope. What is the length of the cheapest rope that can be purchased?
Friday, September 12, 2014 at 8:43pm

Algebra
Rename each of the following using the distributive property of multiplication over addition: A: ax+ bx+ 2x B: 3(a+b)+ x(a+b) and explain how you got this answer please!
Friday, September 12, 2014 at 7:01pm

Algebra
Peter buys 84 yards of fence to make a play area for his puppy. He wants the area to be 28 yards long. What is the area of the play area if he uses the entire fence he bought?
Friday, September 12, 2014 at 4:26pm

Algebra 3-4
The first stage of a rocket burns 28 s longer than the second stage. If the total burn time for both stages is 152 s, how long does each stage burn? Describe how you found your answer. I was originally thinking to divide 152 by 2 then add 28, but I realized that wouldn't ...
Friday, September 12, 2014 at 3:24pm

Algebra
For all real numbers a and b, 2a • b = a^2 + b^2
Friday, September 12, 2014 at 3:12pm

algebra
True or false if the statement is not true give a counterexample. 1.If a>b,and c is positive, then ac>bc? 2.if a^2=b^2,then a=b? 3. If a>b,and c is positive,then a/c>b/c?
Friday, September 12, 2014 at 2:08pm

algebra
I'm not sure how to answer this question? 1<3x+2<12 Please explain the answer so I know how to do these kind of questions
Friday, September 12, 2014 at 1:31pm

Algebra
I posted this earlier but the number was wrong. I don't know why it didn't post the other pie symbol. And ofcourse the extra pie throws me off! A large grain silo is to be constructed in the shape of a circular cylinder with a hemisphere attached to the top (see the ...
Friday, September 12, 2014 at 1:02pm

advanced algebra
The population of a town is divided into three age categories. A random sample of each category is surveyed about voting choices. This type of sampling is called
Friday, September 12, 2014 at 12:24pm

Algebra
A large grain silo is to be constructed in the shape of a circular cylinder with a hemisphere attached to the top (see the figure). The diameter of the silo is to be 30 feet, but the height is yet to be determined. Find the height h of the silo that will result in a capacity ...
Friday, September 12, 2014 at 9:08am

College Algebra
A boy can row a boat at a constant rate of 5 mi/hr in still water, as indicated in the figure. He rows upstream for 24 minutes and then rows downstream, returning to his starting point in another 16 minutes. (Round your answers to two decimal places.) (A) Find rate of the ...
Friday, September 12, 2014 at 9:07am

Algebra
Find the value of x for which the area is a maximum: A = 800 + 20x - 1/2x^2
Friday, September 12, 2014 at 7:13am

Algebra Grade 10
A man wants to create a Japanese garden with a parabolic footbridge to cross the creek in front of his garden. The bridge needs to span 5 meters and - according to the design he has selected - is 2 meters tall at the apex. Find a quadratic model that describes the shape of the...
Friday, September 12, 2014 at 4:24am

Algebra
you need 3 3/4 yards of material for 1 shirt how many shirts can you make with 116 1/4 yards of material
Friday, September 12, 2014 at 1:08am

Algebra 1
A chemist has 10% acid solution and 60% acid solution. HOW many liters of each solution does the chemist need to make 200 L of a solution that is 50% acid?
Friday, September 12, 2014 at 12:07am

algebra
(x/5) - g= a for x
Thursday, September 11, 2014 at 10:41pm

algebra
Alicia finished the race 3.75 seconds befor Kaye. Donna finished the race5.09 seconds after Carmen. Carmen finished the race 10 second before Kaye. Anders finished 4.89 seconds after Kaye. How many seconds earlier did Carmen finish than Anders?
Thursday, September 11, 2014 at 8:40pm

Algebra
If 6 is a root of the equation x^2-8x+k=0, find the value of k.
Thursday, September 11, 2014 at 8:28pm

algebra
A motorboat left a harbor and traveled to an island at an average rate of 11 knots. The average speed on the return trip was 10 knots. If the total trip took 4.2 hours, how far is the harbor from the island
Thursday, September 11, 2014 at 7:19pm

Algebra 1
the temperature at noon in los angeles on a summer day was 88 degrees fahrenheit. during the day, the temperature varies from this by as much as 7.5 degrees fahrenheit. write and solve an absolute-value inequality to find the range of possible temperature for that day.
Thursday, September 11, 2014 at 6:17pm

algebra
Find the price of any container of lemonade at a local grocery store. (You can also find prices in advertisements and on the Internet.) Make sure you write down the number of fluid ounces in the container. Determine the unit price and post the information.
Thursday, September 11, 2014 at 3:09pm

algebra 1
Rod left his house driving south. Marsha left three hours later, driving 42 km/h faster in an effort to catch up to him. After two hours, Marsha finally caught up. Find Rod's rate.
Thursday, September 11, 2014 at 11:51am

Algebra I
I need formula's for figuring out % problems. example 7 is what percent of 4 or %125 of what is 85? or 22.2% of 45 is ?
Thursday, September 11, 2014 at 12:08am

algebra
If only natural gas is hit, the income will be $140,000. If nothing is hit, there will be no income. If the probability of hitting oil is 1/40 and if the probability of hitting gas is 1/20, what is the expectation for the drilling company?
Wednesday, September 10, 2014 at 10:32pm

Algebra
Round each number to the place value indicated by the digit in bold. A: 3587 5 is bold. B: 148213 the first one, one is bold. C: 23785 3 is bold. D: 2357 5 is bold.
Wednesday, September 10, 2014 at 10:03pm

Algebra
About 3540 calories must be burned to lose 1 pound of body weight. Estimate how many calories must be burned to lose 6 pounds.
Wednesday, September 10, 2014 at 9:35pm

algebra
A new machine that deposits cement for a road requires 13 hours to complete a one-half mile section of road. An older machine requires 15 hours to pave the same amount of road. After depositing cement for 2 hours, the new machine develops a mechanical problem and quits working...
Wednesday, September 10, 2014 at 8:31pm

algebra
A jeweler wants to make a silver alloy to be used to make necklaces. How many ounces of a silver alloy that costs $3.50 per ounce should be mixed with one that costs $7.00 per ounce to make a new 30-ounce alloy that costs $6.30 per ounce
Wednesday, September 10, 2014 at 8:30pm

algebra
The length of a rectangle is 3 feet less than twice the width of the rectangle. If the perimeter of the rectangle is 144 feet, find the width and the length
Wednesday, September 10, 2014 at 8:27pm

algebra
A triangle has a perimeter of 56 centimeters. Each of the two longer sides of the triangle is three times as long as the shortest side. Find the length of each side of the triangle
Wednesday, September 10, 2014 at 8:26pm

algebra
It costs a manufacturer $7.95 to produce sunglasses that sell for $21.99. How many pairs of sunglasses must the manufacturer sell to make a profit of $10,530? 1 pairs of sunglasses
Wednesday, September 10, 2014 at 8:14pm

algebra
A motorboat left a harbor and traveled to an island at an average rate of 11 knots. The average speed on the return trip was 10 knots. If the total trip took 4.2 hours, how far is the harbor from the island
Wednesday, September 10, 2014 at 8:13pm

algebra
It costs a manufacturer $7.95 to produce sunglasses that sell for $21.99. How many pairs of sunglasses must the manufacturer sell to make a profit of $10,530
Wednesday, September 10, 2014 at 7:55pm

algebra
An investment adviser invested $14,000 in two accounts. One investment earned 4% annual simple interest, and the other investment earned 2.5% annual simple interest. The amount of interest earned for 1 year was $458. How much was invested in each account?
Wednesday, September 10, 2014 at 7:53pm

algebra 1
a number and its absolute value are equal.if you substract 2 from the number, the new number and its absolute value are not equal. what do you know about the number? what is a possible number that satisfies these conditions? Can you help answer these 2 questions? thanks
Wednesday, September 10, 2014 at 5:55pm

algebra 1
the deepest point in elevation in the indian ocean is the java trench, which is 25,344 feet below sea level. elevations below sea level are represented by negative numbers. can you help write the elevation of the Java Trench? also, a mile is 5,280 feet. Between which two ...
Wednesday, September 10, 2014 at 5:49pm

algebra
two students are playing a math game. the object of the game is to make the least possible number by arranging the given digits inside absolute value bars on a card. In the first round, each player will use the digits 3, 5, and 7 to fill in the card. One student arranges the ...
Wednesday, September 10, 2014 at 5:46pm

Algebra
If the absolute value of a negative number is 2.78, what is the distance on the number line between the number and its absolute value? can you help explain the answer. thanks
Wednesday, September 10, 2014 at 5:43pm

college algebra
A doctor prescribes an ointment that is 4% hydrocortisone. A pharmacist has 1% and 5% concentrations in stock. How many ounces of each should the pharmacist use to make a 3-ounce tube?
Wednesday, September 10, 2014 at 4:03pm

Algebra
use the range strategy to estimate each of the following. Explain how you arrived at your estimates. a) 22*38 b)145+678 c)278+36
Wednesday, September 10, 2014 at 4:02pm

Algebra
A theater has 38 rows with 23 seats in each row. Estimate the number of seats in the theater and tell how you arrived at your estimate
Wednesday, September 10, 2014 at 3:58pm

Algebra
Apples normally sell for $0.32 each. They go one sale for 3 for $0.69. How much money is saved if you purchase 2 dozen apples while they are on sale?
Wednesday, September 10, 2014 at 3:32pm

college algebra
An executive invests $22,000, some at 8% and some at 6% annual interest. If he receives an annual return of $1,680, how much is invested at each rate?
Wednesday, September 10, 2014 at 3:23pm

Algebra!!!! HELP
Find a mathematical model for the verbal statement. (Use k for the constant of proportionality.) V varies inversely as the square of t. V=
Wednesday, September 10, 2014 at 1:16pm

Algebra
Find the price of any container of lemonade at a local grocery store. (You can also find prices in advertisements and on the Internet.) Make sure you write down the number of fluid ounces in the container. Determine the unit price and post the information.
Wednesday, September 10, 2014 at 1:06pm

Algebra!!!! HELP
Use Hooke's Law for springs, which states that the distance a spring is stretched (or compressed) varies directly as the force on the spring. A force of 265 newtons stretches a spring 0.15 meter (see figure). (a) How far will a force of 120 newtons stretch the spring? (...
Wednesday, September 10, 2014 at 12:57pm

college algebra
A taxi cab company charges a flat fee of $3.30 and then an additional $2.20 for each mile. If a taxi fare is $29.70, how many miles was the trip?
Wednesday, September 10, 2014 at 12:43pm

algebra
mr darwin who is found of gardening is pushing a wheelbarrow with a force of 5.0 newtons. there are 11.4 newtons worth of horse manure in the wheelbarrow. the length from the wheel to the end of the handles is 1.6m and the length of the wheel to the center of the bucket is 0....
Wednesday, September 10, 2014 at 2:17am

algebra
Is there a square root that you can think of that would be less then 300% if so what is it ?
Tuesday, September 9, 2014 at 10:16pm

math
8 + (7)with directions please thats alll algebra
Tuesday, September 9, 2014 at 9:20pm

Algebra
1. Solve for the 101st term of the sequence whose 1st term is x-y and d=2x+y-3. 2. In the sequence 2, 6, 10, … , what term has a value of 106? 3. Solve for the 101st term of the sequence: 6-p, 4+p, 2+3p, 5p, … .
Tuesday, September 9, 2014 at 9:11pm

college algebra
compare and contrast the ways in which solving a linear inequality is similar / dissimilar to solving a linear equation please explain
Tuesday, September 9, 2014 at 9:09pm

Algebra 2
Solve the equation. X^2+10x-20=0
Tuesday, September 9, 2014 at 8:43pm

Algebra
38% of children live more than 4 miles from their school. What fraction of the students live more than 4 miles from the school? 38/100 x 4/1=76/50
Tuesday, September 9, 2014 at 7:51pm

algebra
Jim has some nickels, dimes and quarters worth $5.30. There are five times as many dimes as quarters, and six more nickels than dimes. How many of each kind of coin does he have?
Tuesday, September 9, 2014 at 7:46pm

Algebra I
to determine whether a given number is a solution of an equation. Problem: Is 5 a solution of 10x-xto the 2nd power = 3x-10? my work: 10(5)-25=25 and 50-25=25 so x is not a solution. right or wrong? Im new at this
Tuesday, September 9, 2014 at 6:29pm

Algebra
Assume that S/A=7.0, D/A=.40, N/E=.80 and A = D + E. Solve for N/S.
Tuesday, September 9, 2014 at 3:26pm

Algebra
Suppose A - D = E, that N= 16,000, E/A=.75, and N/E=.70. What is D/A?
Tuesday, September 9, 2014 at 3:25pm

Algebra
Suppose that S/A=8.50 and that N/S=.12 Solve for N/A. Help!!!
Tuesday, September 9, 2014 at 3:24pm

Algebra
Suppose that D + E = A, that N/A=.25 and that D/A=.60. Solve for N/E. Help! Explanation please. I want to understand this problem.
Tuesday, September 9, 2014 at 3:23pm

Algebra
An inspector of weights and measures uses a special set of weights to check the accuracy of scales. Various weights are placed on a scale to check the accuracy of any amount from 1 oz. to 15 oz. What is the fewest number of weights the inspector needs? What weights are needed ...
Tuesday, September 9, 2014 at 2:16pm

Algebra
-7x+8y=-8 -2x+6y=-6
Tuesday, September 9, 2014 at 1:59pm

algebra
A taxi cab company charges a flat fee of $3.30 and then an additional $2.20 for each mile. If a taxi fare is $29.70, how many miles was the trip?
Tuesday, September 9, 2014 at 1:33pm

algebra
A restaurant has fixed costs of $156.25 per day and an average unit cost of $4.75 for each meal served. If a typical meal costs $6, how many customers must eat at the restaurant each day for the owner to break even?
Tuesday, September 9, 2014 at 1:33pm

algebra
One morning, Justin drove 5 hours before stopping to eat lunch at Pizza Hut. After lunch, he increased his speed by 10 mph. If he completed a 350-mile trip in 8 hours of driving time, how fast did he drive in the morning?
Tuesday, September 9, 2014 at 1:31pm

algebra
A garden hose can fill a swimming pool in 7 days, and a larger hose can fill the pool in 4 days. How long will it take to fill the pool if both hoses are used?
Tuesday, September 9, 2014 at 1:30pm

algebra
How many mL of a 60% acid solution must be mixed with a 20% acid solution to produce 200 mL of a 50% acid solution?
Tuesday, September 9, 2014 at 1:29pm

algebra
Adult tickets to a play cost $2.25 each and student tickets cost $1.75 each. Suppose there are twice as many student tickets sold as adult tickets. If the income from the play was $1,150, how many of each type of ticket were sold?
Tuesday, September 9, 2014 at 1:28pm

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