Monday
February 20, 2017

# Homework Help: Math: Algebra

## Recent Homework Questions About Algebra

Algebra
Write the gradient of the line perpendicular to the line with gradient. (a) 5 , (b) 7 , (c) -4 , (d) -9 , (e) 1/2 , (f) -3/4 , (g) 3/8 , (h) -2/3
Tuesday, May 24, 2016 by Student

Algebra
The oldest child in a family of four children is twice as old as the youngest. The two middle children are 12 and 15 years old. If the average age of the children is 13.5, how old is the youngest child?
Tuesday, May 24, 2016 by Anonymous

algebra
simplify (x+3/√2-3x)
Tuesday, May 24, 2016 by relebohile

Math-Algebra
A family is building a circular fountain in the backyard. The yard is rectangular and measures 7x by 6x and the fountain is going to be circular with a radius of 2x. Once the fountain is built, what will be the area of the remaining yard? Can someone please walk me through ...
Tuesday, May 24, 2016 by Lady Phantomhive

Algebra
A 154 lb person burns 420 calories per hour riding an exercise bike at a rate of 15 mph. Write a function rule to represent the total calories burned over time by that person. Explain how the information in the problem relates to the function.
Tuesday, May 24, 2016 by Cherokee

Algebra
64^10/64^5 64^10/5 64^50 64^15 64^5******** pls help thanks
Tuesday, May 24, 2016 by Izzy

pre-algebra
is (-1, 5) a solution to 2 x = y - 7 and 2 y = - x + 9
Tuesday, May 24, 2016 by Michael

Algebra
Water coming out from a fountain is modeled by the function f(x)= -x^2+5x+4 where f(x) represents the height, in feet, of the water from the fountain at different times x, in seconds. What does the average rate of change of f(x) from x=3 to x=5 represent?
Tuesday, May 24, 2016 by Rhyleigh

algebra
It is known that a certain function is an indirect proportion. Find the formula for this function if it is known that the function is equal to 12 when the independent variable is equal to 2.
Tuesday, May 24, 2016 by Anonymous

Algebra
An airplane flies 3024 miles into the wind for 14 hours. The return trip takes 9 hours. Find the speed of the airplane without a wind and the speed of the wind.
Tuesday, May 24, 2016 by Anonymous

Algebra
The admission fee at a local zoo is \$1.50 for children and \$4.00 for adults. On a certain day, 2200 people enter the zoo and \$4,550.00 is collected. How many children and how many adults attended?
Tuesday, May 24, 2016 by Anonymous

Algebra
My car gets 13 miles per gallon in the city and 30 miles per gallon on the highway. Suppose I used 15.867 gallons of gas and got an average of 15 miles per gallon for the trip. How many gallons did I use for each part of the trip?
Tuesday, May 24, 2016 by Anonymous

Algebra
My car gets 13 miles per gallon in the city and 30 miles per gallon on the highway. Suppose I used 15.867 gallons of gas and got an average of 15 miles per gallon for the trip.
Tuesday, May 24, 2016 by Anonymous

Algebra
The Connecticut River flows at a rate of 3 km / hour for the length of a popular scenic route. If a cruiser to travels 3 hours with the current to reach a drop-off point, but the return trip against the same current took 7 hours. Find the speed of the boat without a current?
Tuesday, May 24, 2016 by David

algebra
how many solutions does the system of equations have? 6x+18y=9 and -1/3x+1/2 please help! thank you c:
Monday, May 23, 2016 by bangtan trash

College Algebra math
A plane flies due east for 35 miles and then due south until it is 37 miles from its starting point. How far south did the plane fly?
Monday, May 23, 2016 by Kelly

pre algebra Is it A,B,C or D?
Rodney flips a fair coin and chooses a letter tile A, E, I, O AND U. He performs this experiment 50 times to determine the experimental probability that heads is tossed and the letter A is chosen. Which of the following is most likely to be the experimental probability that ...

Pre algebra Am I right??
A six sided number cube is rolled and a coin is flipped. What is the probability that the number on the cube is less than 4 and the coin lands on heads. I worked it out and I think I am right but I would like for someone to double check it for me. 1/2 * 1/2 is .25 which is 1/4...
Monday, May 23, 2016 by Blake Please ck my wk.

algebra
A day during the workweek Monday- Friday, and an hour between 8 am and 1 pm are randomly chosen for a meeting. What is the probability that the meeting is Monday at 8am? I would say it is 1/5. That is what I came up with but I don't think I am right. Help me!
Monday, May 23, 2016 by Ryan BB

ALGEBRA
Rodney fa fair coin and chooses a ter tiles A, E, I, O AND U. He performs this experiment 50 times to determine the experimental probability that heds is tossed and the letter A is chosen. Whitch o following is st likely to be the experimental probability that Rodney ...
Monday, May 23, 2016 by Katie

algebra Please c if this is right?
Mrs. /green is randomly choosing team captains from her class of 12 girls and 10 boys. ?She draw one name from the bag, SETS IT ASIDE, and then chooses a second name. /What is the probability that both team captains are girls? I would say it is 2/7 Can someone check to see if ...
Monday, May 23, 2016 by lynn

ALGEBRA
A SPINNER WITH FOUR EQUAL SECTIONS NUMBERED 3,5,7 AND 8 IS SPUN TWICE. WHAT IS THE PRBABILITY THAT AN ODD NUMBER IS SPUN THE FIRST TIME AND AN EVEN NUMBER IS PUN THE SECOND? IS THE ANSWER 3/4? IS IT THAT EASY OR NOT?
Monday, May 23, 2016 by JEFFREY

Algebra
Charlie's wallet contains 3 ones, 2 fives, 2 tens, and 4 twenty dollar bills. ?Charlie randomly grabs a bill from his wallet, replaces it, and grabs another bill. What is the probability that the sum of the two bills is \$25? Maybe 6/25 or 6/110. I am confusing myself now and I...
Monday, May 23, 2016 by Blake

Algebra
A cup of pens contains 5 red, 12 black, and 13 blue pens. A pen is chosen randomly and not replace. Then a second pen chosen. What is the probability that the first pen is black and the second pen is red? Would the correct answer be 2/29?
Monday, May 23, 2016 by Bradley B

pre algebra
The probability that Ann will have a test on Wednesday is .9. If she takes the test, there is a probability of .8 that she will pass the test. What is the probability that Ann will not pass the test on Wednesday? Is it .18 ?
Monday, May 23, 2016 by kathy

Algebra 1B Radical expressions & data analysis
1. Simplify 2/√5 A. 2/√5 B. √10 C. √10/5 D. 2√10/5 *** My answer 2. Simplify -11√112 A. -44√7 B. -176 √7 C. -27 √7 D. 4√7 *** My answer 3. Simplify 17√17 -9 √17 A. 8 *** My answer B. 8√17 C. 26√...
Monday, May 23, 2016 by Mermaid99

algebra
A student rolled two six-sided number cubes several times. The numbers below are the sums of the numbers she rolled. Which histogram represents the data?2, 7, 10, 6, 12, 9, 5, 10, 6 I'm stuck
Monday, May 23, 2016 by Anonymous

Brandon flips two fair coins multiple times and records the frequency of the results in the following table. 50 trials|125trials|150trials HH 10 33 37 TH 9 31 38 HT 13 28 38 TT 18 33 37 DETERMINE THE EXPERIMENTAL PROBABILITY AND THEORETICAL PROBABILITY FOR EACH OUTCOME IN EACH...

algebra
The volleyball team at West View High School is comparing T-shirt companies where they can purchase their practice shirts. The two companies, Shirt Box and Just Tees, are represented by this system of equations where x is the number of T-shirts and y is the total cost of the T...
Monday, May 23, 2016 by joanne

Algebra
PLEASE HELP ME :( Brandon flips two fair coins multiple times and records the frequency of the results in the following table. 50 trials|125trials|150trials HH 10 33 37 TH 9 31 38 HT 13 28 38 TT 18 33 37 DETERMINE THE EXPERIMENTAL PROBABILITY AND THEORETICAL PROBABILITY FOR ...
Monday, May 23, 2016 by Blake

Algebra
Brandon flips two fair coins multiple times and records the frequency of the results in the following table. 50 trials|125trials|150trials HH 10 33 37 TH 9 31 38 HT 13 28 38 TT 18 33 37 DETERMINE THE EXPERIMENTAL PROBABILITY AND THEORETICAL PROBABILITY FOR EACH OUTCOME IN EACH...
Sunday, May 22, 2016 by Blake

Algebra
A chemist wishes to mix a solution that is 4​% acid. She has on hand 66 liters of a 2​% acid solution and wishes to add some 8​% acid solution to obtain the desired 4​% acid solution. How much 8​% acid solution should she​ add? There is a ...
Sunday, May 22, 2016 by Sarah

Algebra
The height of Tower A is 940 feet more than Tower B. The two towers have a combined height of 1,540 feet. What are the heights of each​ tower?
Sunday, May 22, 2016 by Sarah

pre-algebra
The width of a rectangle is 30 centimeters. Find all possible values for the length of the rectangle if the perimeter is at least 768 centimeters.
Sunday, May 22, 2016 by Savage

Algebra
the length of a rectangle is 4 less than 3 times the width if the perimeter is 48 inches find the length and the width
Sunday, May 22, 2016 by Ethan

Algebra
A box contains 5 yellow balls, 3 blue, and 1 red ball. Two balls are drawn at random. Find the probability that the two balls are yellow
Sunday, May 22, 2016 by vivian

algebra
A mother is 21 years old then her new born daughter. how old does her daughter when her age will be 1 by 4 of her mother
Sunday, May 22, 2016 by lily

math or algebra
F2088nd the next three terms of the sequence. -2, -12, -72, 432. Possibilities are: 1. -1728 -6912 -27,648 2. -1728 -10,368 -62,208 3. -2592 -10,368 -41,472 4. -2,592 -15,552 -93,312 I have tried multiplying positive numbers times the negative but can't make the numbers match ...
Sunday, May 22, 2016 by james

algebra 1
Evaluate: 30 - m/6 for m = 30. a. 25 b. 0 c. 6 d. 1 i chose a. 25? please verify. thanks
Saturday, May 21, 2016 by caroline

Algebra
A bag of marbles contains 3 yellow marble, 3 red marbles, and 5 green marbles. If a marble is chosen, put back in the bag and then a second marble is chosen, what is the probability that both marbles will be red? I think it is 2 red 10 all together 2:10 2/10 = 1/5 But I am not...
Friday, May 20, 2016 by Blake

Algebra
Please check my answer The ordered pairs (0,1), (1, 6),(2, 36), (3, 216), and (4, 1,296) represent a function. What is a rule that represents this function? A y=x^6*** B y=6x C y=x+6 D y=6x
Friday, May 20, 2016 by Matt

pre algebra
Which polynomial does the model represent? and then it has one big black block, 2 thin white blocks, 3 thin black blocks, 3 single white cubes, and one single black cube. Please help ASAP!!!
Friday, May 20, 2016 by HELP!!!

Algebra
Randall wants to mix 57 lbs of nuts worth \$1 per lb with some nuts worth \$6 per lb to make a mixture worth \$5 per lb. how many lbs of \$6 nuts must he use?
Friday, May 20, 2016 by Carl

pre-algebra
number increased by 1/3 itself, number is 84, find original number
Friday, May 20, 2016 by carol

Algebra
Research the financial crisis in Greece and summarize it in one-two paragraphs. Note: Paragraphs consists of three complete sentences. This is an academic assignment where you need to use proper grammar (i.e., capitalization, punctuation, and no abbreviations I already wrote ...
Friday, May 20, 2016 by BUBBLES

Pre Algebra
5. (m^2-m-3)+(m-4) A. m^2+m-1 B. m^2+2m-7 C. m^2-7 D. m^2-1 6. (4x^2-2x-1)-(-3x^3+2) A. -3x^3+4x^2-2x+1 B. -3x^3+4x^2-2x-3 C. 3x^3+4x^2-2x+1 D. 3x^3+4x^2-2x-3 9. 100^12/100^8 A. 100^12/8 B. 100^96 C. 100^4*** D. 100^20 16. (1.1*10^-5)(3*10^-2) A. 4.1*10^-7 B. 4.1*10^10 C. 3.3*...
Friday, May 20, 2016 by I need some help!

Algebra
) Research the financial crisis in Greece and summarize it in one-two paragraphs. Note: Paragraphs consists of three complete sentences. This is an academic assignment where you need to use proper grammar (i.e., capitalization, punctuation, and no abbreviations I already wrote...
Friday, May 20, 2016 by BUBBLES

Algebra
Does the data in the table represent a direction variation or an inverse variation, write an equation x 1 2 5 10 y 40 20 8 4 My answer is a direct variation, y=40x, is this correct? here are the other answers direct variation 7=1/40x inverse variat xy=40 inverse xy=1/40
Friday, May 20, 2016 by abbey

Algebra
f) Suppose you started with 100 bacteria, but they still grew by the same growth factor. Explain how your exponential equation in (b) would change. y=1*3x**** b) is Bacteria name: Staphylococcus aureus Generation Time: 30 minutes *Note: The generation time tells you how often ...
Friday, May 20, 2016 by BUBBLES

Algebra
a) Research the financial crisis in Greece and summarize it in one-two paragraphs. Note: Paragraphs consists of three complete sentences. This is an academic assignment where you need to use proper grammar (i.e., capitalization, punctuation, and no abbreviations This is my ...
Friday, May 20, 2016 by BUBBLES

Algebra
Parallelogram ABC is translated up 2 units. What are the coordinates of the new parallelogram? A (3, 1) B (7, 1) C (5, 6) D (1, 6)
Friday, May 20, 2016 by Karmen

Pre algebra
A coin is tossed and a number cube is rolled. What is the probability that the coin shows heads and the number cube shows 6?
Friday, May 20, 2016 by Lori

Algebra
A chemist mixed a 70% alcohol solution with a 30% alcohol solution to make a 45% alcohol solution. How many liters of each were used to make 120 L of a 45% solution? I tried solving this with elimination method and made two separate equations. For instance, x+y = 120(.45) .70x...
Friday, May 20, 2016 by Annie

Algebra
She has 1000 bushels of corn to sell. Presently the market price is \$5.00 bushel. She expects market price to increase .15 a week. For each week she wants to sell,she loses 10 bushels to spoilage. Determine a function to express her total income from selling the corn.
Thursday, May 19, 2016 by Anonymous

College Algebra
Randall wants to mix 41 lb of nuts worth ​\$2 per lb with some nuts worth ​\$8 per lb to make a mixture worth ​\$7 per lb. How many pounds of ​\$8 nuts must he​ use?
Thursday, May 19, 2016 by Sarah

Algebra
Translate the following phrase into an algebraic expression. Do not simplify. y divided by the product of 4 and x
Thursday, May 19, 2016 by Anonymous

Algebra 2
A test has 200 points. THe mean is 120 and the standard deviation is 20. In order to pass the test one must score 140 points. If 360 people took the test how many passed
Thursday, May 19, 2016 by Dee

Algebra
Write y = -2/5x + 3 in standard form using integers. A)2x+5y=-15 B)2x-5y=15 C)2x+5y=3 D)2x-5y=3 I don't agree with any of these answer choices. I cam up with this answer; 2x+5y=15, but it is not one of the answer choices. Is my answer wrong? If so, what's the right answer? ...
Thursday, May 19, 2016 by Scarlet

Algebra
For f(x) = 0.01(2)x, find the average rate of change from x = 2 to x = 10.
Thursday, May 19, 2016 by alex

Algebra II
In triangle ABC, C is a right angle. Side c=9 and side a=5. What are the measures of the remaining sides and angles, in degrees, of the triangle? Round answers to the nearest hundredth if needed.
Thursday, May 19, 2016 by Denise

Pre Algebra
1.18x^2+4x-15x^2-4+13x 2.2x^2+8-4x+3x-6x^2+7 3.4x^2+8x-11x=6-5x^2+2
Thursday, May 19, 2016 by Tot

algebra 1
The function H(t) = −16t^2 + 90t + 50 shows the height H(t), in feet, of a projectile after t seconds. A second object moves in the air along a path represented by g(t) = 28 + 48.8t, where g(t) is the height, in feet, of the object from the ground at time t seconds. Part...
Thursday, May 19, 2016 by Simon

algebra 1
The function H(t) = −16t^2 + 90t + 50 shows the height H(t), in feet, of a projectile after t seconds. A second object moves in the air along a path represented by g(t) = 28 + 48.8t, where g(t) is the height, in feet, of the object from the ground at time t seconds. Part...
Thursday, May 19, 2016 by Simon

16. Use the quadratic formula to solve the equation. 〖5x〗^2 - 47x = 156 18. What are the solutions to the equation x2 – 4x = -1? 19. Graph the set of points. Which model is most appropriate for the set of numbers? (1,3), (0,0), (-3,3), (-1,-1), (-2,0)
Thursday, May 19, 2016 by Anonymous

algebra II
Joe has 120 coins consisting of dimes and quarters with a value of \$19.05. how many dimes and quarters does Joe have?
Thursday, May 19, 2016 by Allison

Algebra
Two numbers add up to 20. The sum of their square is 20 less than 3 times their product. Formulate equations and find the numbers. I know the first equation (x+y=20), but i don't know the second one.
Thursday, May 19, 2016 by Luke

Algebra 2
Robert spins the spinner and rolls a standard number cube. Find the probability that the spinner will stop on purple and the cube will show a six.
Wednesday, May 18, 2016 by Rhi

Algebra
How is the graph of y= -6 x^2 +4 different from graph of y= -6x^2 ? A. It is shifted 4 units to the left. B. It is shifted 4 units to the right. C. It is shifted 4 units up. D. It is shifted 4 units down. *** (My Answer)
Wednesday, May 18, 2016 by Mermaid99

help algebra??
stillwater junior high divides students into teams taught by a group of teachers the table shows the number of students in each team. imgur . com/x7kghII (picture of student numbers) The principle uses a computer to randomly select the name of a student from all the students ...
Wednesday, May 18, 2016 by Nyanka

Algebra 2
Participants in a study of a new medication received either medication A or a placebo. Find P(placebo and improvement). You may find it helpful to make a tree diagram of the problem on a separate piece of paper. Of all those who participated in the study, 80% received ...
Wednesday, May 18, 2016 by Maggie

Algebra I
Grisham is considering the three situations below. I. For the first 28 days, a sunflower grows at a rate of 3.5 cm per day. II. The value of a car depreciates at a rate of 15% per year after it is purchased. III. The amount of bacteria in a culture triples every 2 days during ...
Wednesday, May 18, 2016 by Anonymous

Algebra
of 10 test scores, six are less than or equal to 80. what is the percentile rank of a test score of 80. please tell me how you get it?
Wednesday, May 18, 2016 by sd

Algebra 2 help plsss?
what is a simpler form of the radical expression? 4sqrt1296 x^16 y^12 how can you write the expression with rationalized denominator? 3 sqrt 2 / 3 sqrt 4 what is the quotient (4-x)/(x^2 + 5x - 6) / (x^2 - 11x + 28)/(x^2 + 7x + 6) in simplified form? State any restrictions on ...
Wednesday, May 18, 2016 by Nyanka

Algebra
Parallelogram ABC is translated up 2 units. What are the coordinates of the new parallelogram? A (3, 1) B (7, 1) C (5, 6) D (1, 6)
Wednesday, May 18, 2016 by Karmen

Algebra 1
I need help with this inequality, I'm not sure how to solve for 's'. 1 ⅓s - 3 < s + ⅔ - ⅓s
Tuesday, May 17, 2016 by Murkle

Algebra
7x + 5 = y 3.5x + 20 = y Solve the system of equations. What method did you use to solve the system and why? Show your work. Can someone please explain to me the process of solving the system? That would be nice. Thanks! (=
Tuesday, May 17, 2016 by Scarlet

algebra 1
1. MULTI-STEP PROBLEM There are 5743 known amphibian species in the world. Of these, 1856 species are judged to be at risk of extinction, and another 113 species may already be extinct. a. Find the probability that an amphibian species chosen at random is at risk of ...
Tuesday, May 17, 2016 by Ruby

You are selling rings for \$7 dollars each. You have been contacted by a customer in Alaska who wants to purchase several of these rings and wants you to ship them to her. It’s only going to cost you \$5 to ship these items to Alaska. Suppose another company sells the same ...
Tuesday, May 17, 2016 by Scarlet

How can I factor 18x^2+x=5 by completing the square?
Tuesday, May 17, 2016 by Anonymous

Algebra II
A triangle has vertices (-2,-3), (3,5), and (8,-1) Write a matrix expression to represent rotating the triangle 90° clockwise. Evaluate the matrix expression and list the coordinates of the vertices of the transformed figure. Please help me! I was absent for the entirety of ...
Tuesday, May 17, 2016 by Anonymous

Algebra
Please help with the following problem: Suppose that x and y vary directly, and x=4 when y=10. Write the function that models the direct variation.
Tuesday, May 17, 2016 by Theresa

algebra
graph and show solution for y = Ix+2I and translated y =- IxI
Tuesday, May 17, 2016 by van

algebra 2
A person playing a game of chance has a 0.25 probability of winning. If the person plays the game 20 times and wins half of that number of times, what is the difference between the theoretical probability and the experimental probability of that person winning ? 0.50 0.25 0.30...
Tuesday, May 17, 2016 by ash

Math/algebra
81,85,82, 93,85,84,95,87,88,91 Find the standard deviation.
Tuesday, May 17, 2016 by Charles HELP ME PLEASE IDK WHAT TO DO

Math/algebra
What is the 20th term of the sequence that begins with −2, 4, -8, 16 ANSWER CHOICES: A)2,097,152 B)524,288 C)-524,288 D)1,048,576 Answer Th

Algebra
Is this sequence 10, 15, 20, 25, 30 an arithmetic or geometric sequence? Then find the explicit formula and recursive formula for the given sequence.
Tuesday, May 17, 2016 by Steph

algebra 2b
A simple random sample of 50 adults was surveyed, and it was found that the mean amount of time that they spend surfing the Internet per day is 54.2 minutes, with a standard deviation of 14.0 minutes. What is the 99% confidence interval (z-score = 2.58) for the number of ...
Tuesday, May 17, 2016 by kevin

Algebra
where is the following expression in undefined?? (x+1)(x-2)/x^2-25
Monday, May 16, 2016 by Mario

Algebra
The height, in meters, of a projectile can be modeled by h= -4.9t^2 + vt + s where t is the time (in seconds) the object has been in the air, v is the initial velocity (in meters per seconds) and s is the initial height (in meters). A soccer ball is kicked upward from the ...
Monday, May 16, 2016 by Cooper

Algebra
1. A bag contains 9 tiles numbered 1 to 9. p (4) = 1/9. What type of probability is illustrated and why? 2. You toss a coin 15 times. p(heads) 2/5= 3. A number cube is rolled 150 times. The number 3 comes up 43 times. What is the experimental probability of rolling a 3? What ...
Monday, May 16, 2016 by Greedo

Algebra 1
The perimeter of a rectangle is 300 feet the width of the rectangle is 10 feet more than the length what is the width of the rectangle ?
Monday, May 16, 2016 by Alejandra

Algebra
What is the sum of (3x-2) and (5x^2+3x)
Sunday, May 15, 2016 by Marybeth

Algebra
how would you solve (3_/8)(2_/6) using multiply and simplifying.
Sunday, May 15, 2016 by Blake

algebra/trigonometry
A kite and a height of 75 meters from the ground is attached to a string inclined at 60 degrees to the horizontal. How do you find the length of the string to the nearest meter?
Sunday, May 15, 2016 by Christie

Algebra
Solve y= 2x+ 3 and y= 4x+3 I came up with the answers (0,3) using both substitution and elimination methods. What is the "independent" variable and "dependent" variable? What would be a "real world situation" including independent and independent variables? I'm lost...
Sunday, May 15, 2016 by J. J.

Algebra
Write each series as a summation in sigma notation. (−1)^2+0^2+1^2+2^2+3^2
Sunday, May 15, 2016 by vivian

Algebra
Write each series as a summation in sigma notation. 5+8+11+14 i=1
Sunday, May 15, 2016 by vivian

Algebra
1. Simplify the rational expression State any excluded values. 7x-14/x-2 A.x B.7;where x≠7 C.7;where x≠2**** D.0 I know its between B and C but I'm not sure what the -->≠ is really asking me for but I think the answer is C, please help
Sunday, May 15, 2016 by GummyBears

Algebra
1.Since opening night, attendance at Play A has increased steadily, while attendance at Play B first rose and then fell. Equations modeling the daily attendance y at each play are shown below, where x is the number of days since opening night. On what day(s) was the attendance...
Sunday, May 15, 2016 by GummyBears16

Algebra 2
what is the solution of the equation 8=(x-3)^3/4 It's not making sense I try to solve it but I don't get 8. below are the plug in choices. 16 13 19 11
Sunday, May 15, 2016 by bubble dragon