Wednesday
August 24, 2016

Homework Help: Math: Algebra

Recent Homework Questions About Algebra

algebra
How do i do this okay i have x=17-4y and y=x-2 i have to solve by using substitution i don't get it do i replace x-2 for x then solve please help me
Tuesday, August 23, 2016 by sam

Algebra 1
To which subsets of real numbers does the number –22 belong? Choose all subsets that apply. whole numbers** rational numbers integers** irrational numbers natural numbers Maximum choice is 2
Tuesday, August 23, 2016 by Anonymous

Algebra
Identical squares are cut off from each corner of a rectangular piece of cardboard measuring 7cm by 12cm. The sides are then folded up to make a box with an open top. If the volume of the box is 33cm^3, what is the largest possible length of each side of the square?
Tuesday, August 23, 2016 by Alfred

algebra
write equivalent expressions for x^7 ⋅ x^-2 and x^7 ÷ x^2. What do you notice? Explain how your results relate to the properties of integer exponents. THANK YOU!
Tuesday, August 23, 2016 by Tim

Algebra
Simplify 1/(1/x+1/y)=6
Tuesday, August 23, 2016 by Hello

Algebra PLEASE HELP ASAP MS.SUE PLEASE HELP
Which statement about the product is true? 5.5 square root of 5 A. The product is rational B.the product is irrational C.the product is neither rational or irrational D.there is not enough information provided to answer the question Which of the following cereals is the Best ...
Tuesday, August 23, 2016 by Kylieemo82

algebra
The mass of the Sun is about 2x10^27 metric tons, or 2x10^30 kilograms. How many kilograms are in one metric ton? THANK YOU!
Tuesday, August 23, 2016 by Tim

algebra
evaluate -a^n when a=3 and n=2,3,4 and 5. Now evaluate (-a)^n when a=3 and n=2,3,4 and 5. Based on this sample, does it appear that -a^n=(-a)^n? If not, state the relationships, if any, between -a^n and (-a)^n. THANK YOU!!
Tuesday, August 23, 2016 by Tim

Algebra
1.A number exceeds 6 by 4 2. A number q is 5 more than 10
Tuesday, August 23, 2016 by Rahila

Algebra 1
Z/3-3=z/4+7 Please help i dont understand this solving linear equations
Monday, August 22, 2016 by Monique

Algebra 1
11n+23=3n-13+84 Solving multistep linear equations If someone could show me step by step how to do this it would mean alot god bless!
Monday, August 22, 2016 by Angelina

algebra
Special factorization Completely factor the following expressions 250x^3-128 X^6-1 X^6+1 x^2-8xy+16y^2-25 16x^4a-y^8a ((8x^3)/125)+(64/y^3) I was given a set on how to do this skill, but it didn't really cover on how to attack these kind of expressions. I was wondering if ...
Monday, August 22, 2016 by yaga

Algebra
if V(r)=(4/3)(pi)r^3 find V(2r) ------ V(r) I'm very confused on how to solve this function. Could someone guide me through this?
Monday, August 22, 2016 by Finn

Algebra 1a
I need help
Monday, August 22, 2016 by Nathan

Algebra
Root of 3x-6 = -4 3x-6 is all under a square root
Monday, August 22, 2016 by Anthony

Algebra
I need some help on this math problem. 3c^2 - 5c - 7.8 = -2.2
Monday, August 22, 2016 by Brian

Algebra
Been working on this problem for nearly 45 minutes now, totally confused. 4.5x - 6.7y = 8.6 3.8x +2.2 = y
Monday, August 22, 2016 by Johnny

Algebra
Need some help with this question 65.9 - 32.4k/9.9 = 13.3k / stands for a fraction bar
Monday, August 22, 2016 by John

Algebra
Hey! I need some help with this question! I totally forget how to do these types of problems! 1 over 2.75 = 1 over 3.2 - 1 over x ( 1/2.75 = 1/3.2 - 1/x) / = fraction bar
Monday, August 22, 2016 by Andrew

algebra 1 please help
use the formula for the area of a trapezoid A=h(b1+b2) where A is area , b1 and b2 are (-----) 2 the lenght of the bases and h is the height, to answer the qustion. How many square feet of grass are there on a trapezoidal field with a heigth of 75 ft and base of 125ft and 81 ft??
Monday, August 22, 2016 by 9th grader

algebra 1
The cost of a telephone call is $0.75+$0.25 times the number of minutes. Write an algebraic expression that models the cost of a telephone call that last t mminutes. $0.75 + 0.25 * t
Monday, August 22, 2016 by 9th grader

algebra 1
write an algebraic expression for the following word phrase: the quotient of r and 12 a. r x 12 b. r + 12 c. r / 12 ** d. r - 12
Monday, August 22, 2016 by 9th grader

algebra
a ball is thown upward from the top of the cliff 12 m at a velocity of 2.8 m/s. find maximum height and when it is attained; time it reached the ground
Monday, August 22, 2016 by pao

algebra
For a given interest​ rate, simple interest varies jointly as the principal and time. If ​$2000 left in an account for 6 years earned interest of ​$960, then how much interest would be earned in 7 ​years?
Monday, August 22, 2016 by leinani

ALGEBRA
Jim began a 281​-mile bicycle trip to build up stamina for a triathlete competition.​ Unfortunately, his bicycle chain​ broke, so he finished the trip walking. The whole trip took 7 hours. If Jim walks at a rate of 3 miles per hour and rides at 43 miles per&#...
Monday, August 22, 2016 by KIERSTEN

Algebra
-11^2 Would it be -121 or 121. I think it is negitive please correct me if wrong.
Sunday, August 21, 2016 by Kaashif

Algebra
Solve absolute value t - 2 = -1 A. -1, 3 B. -1, 1 C. -3, 3 D. -3, 1 Thank you!! I got D. Please correct me if I am wrong. Thank you again for assistance.
Sunday, August 21, 2016 by Kaashif

Algebra
What would the domain of Y=_/2x+14)/(x^2)-49 be? (2x+14 is under a square root) There's a hole but I do not know how to factor them
Saturday, August 20, 2016 by Anonymous

algebra
a ball is dropped from the top of a building that is known to be 256 feet high.the formula for finding the height of the ball at any time t is h=256-16t^2,where t is measured in seconds.how many seconds will it take for the ball to hit the ground?
Saturday, August 20, 2016 by Anonymous

Algebra
A number consist of 3 digits.The middle digit is 0 and the sum of the first and last digits is 13.If the digits are reversed the number is increased by 297.Find the original number.MY SOLUTION: let x=the 1st digit & y=last digit x+y=13 i.e eqn1 & pls help
Saturday, August 20, 2016 by Oduro Hayford

Maths Algebra
Deepak👦is twice as old as his brother Vikas👶. If the difference of their ages be 11 years,find their👬present ages.after 18 years ,their👬ages will be twice . Find this also.
Saturday, August 20, 2016 by Shaswad

Maths Algebra
Mona's👧 father👨 is thrice as old as mona👧. After 12 years,his👴age will be twice that of his daughter👩. Find their present ages.
Saturday, August 20, 2016 by Sakshi sinha

Maths Algebra
The number of boys👦 in a school🏢 is 334 more than the number of girls👧. If the total strength👦👧 of the school🏢 is 572,find the number of girls👧 in the school.
Saturday, August 20, 2016 by Sakshi

Maths Algebra
A man😆 travelled 🚂 3/5 of his journey🚞 by rail🚋, 1/4 by a taxi🚕,1/8 by bus🚃and the remaining 2 km on foot💃. What is the length of his total journey??
Friday, August 19, 2016 by Sakshi s.

Maths Algebra
Half of a herd of deer are grazing in the field and three-fourths of the remaining are playing nearby.The rest 9 are drinking water from the pond.Find the number of deer in the herd.
Friday, August 19, 2016 by Vivek

Maths Algebra
In a hostel,50 kilogram milk are consumed everyday.If each student gets 400 gram of milk per day,find the number of students who take drinks in the hostel.
Friday, August 19, 2016 by Vivek

Maths Algebra
A sum of Rs 8400 is made up of 50,20,10 and 5 rupee notes.The number of 10 rupee notes is five times the number of 5 rupee notes, four times the number of 20 rupee notes and ten times the number of 50 rupee notes.What is the number of notes in each denominator?
Friday, August 19, 2016 by Vivek

Maths Algebra
Ravi owns a plot of rectangular shape.He has fenced it with a wire of length 750 m.The length of the plot exceeds the breadth by 5 m. Find the length and breadth of the plot.
Friday, August 19, 2016 by Vivek

Maths Algebra
Solve and check the result.3(5x-7)-2(9x-11)=4(8x-13)-17
Friday, August 19, 2016 by Vivek

Maths Algebra
In a Library stack there are 4 books each of thickness 24 mm and 6 paper sheets each of thickness 0.015 mm. What is the total thickness of the library stack in scientific notation?
Friday, August 19, 2016 by Vivek

Maths Algebra
Mass of Earth is (5.97×10^24)kg and Mass of Moon is (7.35×10^22)kg.What is the Total mass of the two?
Friday, August 19, 2016 by Vivek

Maths Algebra
The diameter of Sun is (1.4 ×10^8)m and the diameter of Earth is (1.2742×10^4)m . Show that the diameter of sun is nearly 100 times the diameter of Earth.
Friday, August 19, 2016 by Vivek

Maths Algebra
A steamer goes downstream and covers the distance between two ports in 4 hours while it covers the same distance upstream in 5 hours.If the speed of the stream is 2 km/h.Find the speed of steamer in still water.Check your solution.
Friday, August 19, 2016 by Vivek

Pre algebra
Question 1 (Multiple Choice Worth 1 points) (01.01 MC) Which decimal number best describes the fraction fraction 137 over 6? *** A repeating decimal 22.83 with a bar over 3 A terminating decimal 22.83 A repeating decimal 22.82 with a bar over 2 A terminating decimal 22.82 ...
Thursday, August 18, 2016 by Waffles

Pre-Algebra 8th grade
I need help with my homework that is due tomorrow. Question 1 (Multiple Choice Worth 1 points) (01.01 MC) Which decimal number best describes the fraction fraction 137 over 6? *** A repeating decimal 22.83 with a bar over 3 A terminating decimal 22.83 A repeating decimal 22.82...
Thursday, August 18, 2016 by Waffles

Algebra II
Let f(x) = 2x − 6. Solve f^−1(x) when x = 2. I think it is 4. f(x) = 2x - 6 y = 2x - 6 x = 2y - 6 +6 + 6 x + 6 = 2y ----- ---- 2 2 x + 6 ----- = y or f^-1(x) 2 x = 2: 2 + 6 8 ----- = --- 2 2 8 --- = 4 2
Thursday, August 18, 2016 by J

algebra
If x+1/x=2 then the value of x^2014+1/x^2016
Thursday, August 18, 2016 by vishal

Maths Algebra
The size of a red blood cell is 0.000007 m and that of a plant cell is 0.00001275 m.Show that a red blood cell is half of plant cell in size
Wednesday, August 17, 2016 by Vivek

Algebra
Are functions have one x and one y?
Wednesday, August 17, 2016 by Jack

Algebra
what symbol is needed between -2 ? |-3| to make a true statement. < > =
Wednesday, August 17, 2016 by Nick J.

Algebra
The lenght of one base of a trapezoid is 19 less than five times the length of the other base. If the trapezoid has a height of 18 feet and an area of 477 ft2, find the length of the longer base
Wednesday, August 17, 2016 by Sharell

Algebra 1
Evaluate the following expression using the values given: Find 3x^2 − y^3 − y^3 − z if x = 3, y = −2, and z = −5. Numerical Answers Expected! thanks so much if you could help me. This is for an exam and I need to pass this.
Wednesday, August 17, 2016 by Summer Moriarty

Algebra 1
Find 3x − y − 3z if x = −2, y = 1, and z = −2. A. -13 B. -1 C. 1 D. 13 I am stuck between A and B
Wednesday, August 17, 2016 by Summer Moriarty

Algebra
1. A man completing a 40km trip finds that by travelling one more km per hour, he could have made the journey in 2 hours less time. At what speed did he actually travel? 2. One pipe alone can fill a tub in 6 minutes less than it takes a second pipe alo e to fill the same tub. ...
Wednesday, August 17, 2016 by sylvia

algebra
the temperature dropped 3 degrees for 9 hours straight what is the total temperature change during the 9 hours
Wednesday, August 17, 2016 by leslie

algebra
how to solve this problem using grouping symbols. 4^2 -5 x 2+1=1
Tuesday, August 16, 2016 by monica

algebra 1
write the fraction as a difference. 3x - 7 _______ 12
Tuesday, August 16, 2016 by lilly

Algebra
Please tell me how to set this up... The force acting on an object varies directly with its acceleration. A force of 25 newtons accelerates an object at 1.25 m/s. What is the acceleration of a 35 newton force?
Tuesday, August 16, 2016 by Janice2

math algebra
what is the 7th term of the geometric sequence 10,2.2/5,2/25 (solve here)
Tuesday, August 16, 2016 by eljone

algebra
A positive two-digit number is such that the product of the digits is 24.When the digits are reversed the number formed is greater than the original number by 18.Find the number.
Tuesday, August 16, 2016 by degea

Algebra
Simplify and write with positive exponet (4x^-1)^-1 Work: (1/4x)^-1 (1/(1/4x))(4x/4x)= 1 (X^3+3x^2+3x+1)^-2/3 Work 1/(X^3+3x^2+3x+1)^2/3 1/(X^2+52/25x^4/3+52/25x+1) I'm confused on whether these are right or not can someone check my work or explain to me why they're ...
Tuesday, August 16, 2016 by Yaga

algebra
Let $x$, $y$, and $z$ be positive real numbers that satisfy \[2 \log_x (2y) = 2 \log_{2x} (4z) = \log_{2x^4} (8yz) \neq 0.\] The value of $xy^5 z$ can be expressed in the form $\frac{1}{2^{p/q}}$, where $p$ and $q$ are relatively prime positive integers. Find $p + q$.
Tuesday, August 16, 2016 by clache

Algebra
True or false? Negative numbers are closed under addition. Give a counterexample True or false? Prime numbers are closed under subtraction. Give a counterexample True or false? Natural numbers are closed under division. Give a counterexample
Monday, August 15, 2016 by Katherine

Algebra
A piece of lumber two and one forth feet long is to be cut into three equal pices. How long will each piece of cut wood be? Give the measurement in feet and in inches.
Monday, August 15, 2016 by Amyree

algebra 2
You have a pool that measure 15 yards by 10 yards. You want to build a deck around all four sides of the pool and you want to increase the total area to 250 square yards. What is the width of the deck?
Monday, August 15, 2016 by muneca

algebra
The sum of two numbers is 100. Such that the first number is twice as large as the second number, when the second number is subtracted by 1.
Monday, August 15, 2016 by AJ

Algebra
which is another way to write to 72 - (-25)
Sunday, August 14, 2016 by Nick J.

algebra
Substitute 6x² from 3y-2x+5x²
Sunday, August 14, 2016 by Donna

Algebra
At a concession stand, three hot dogs and four hamburgers cost $12.00; four hot dogs and three hamburgers cost $10.75. Find the cost of one hot dog and the cost of one hamburger.
Sunday, August 14, 2016 by Rebecca

algebra
the probability of winning a particular game at the game store is one fourth. fine the odds of winning the game
Sunday, August 14, 2016 by ray

algebra
You also have two options for lodging. Write an equation FOR EACH OPTION that depicts the total cost of your stay, y, based on the number of days, x. Bilton Hotel: $100/night but you must pay an additional one-time fee of $40 for parking and other fees Triple Tree: $110/night ...
Saturday, August 13, 2016 by alex

algebra
You want to celebrate all of your recent successes. You decide to reward yourself and a special someone with a vacation to a destination of your choosing. For your trip you will need to stay in a hotel/resort and rent a car. You decide to rent a car for the duration of your ...
Saturday, August 13, 2016 by sarah

algebra
what is the expression for 17
Saturday, August 13, 2016 by nay

Algebra
Find the average rate of change of h (x)=2x squared-7x from x=1 to x=5. Simpifily your answer as much as possible.
Friday, August 12, 2016 by Cody

Algebra
1. The opposite of ¨C4 is (1 point) 4. ¨C4. ¨C(¨C(¨C4)). ¨C|4|. 2. The opposite of ¨C10 is (1 point) ¨C(¨C(¨C10)). ¨C10. 10. ¨C|10|. 3. Which symbol is used to make ¨C5 ? ¨C8 a true statement? (1 point) > < = ¡...
Friday, August 12, 2016 by James Bondd

Algebra
-5 ? -8 which symbol needs to be right there > < = ‚
Friday, August 12, 2016 by James Bondd

Algebra 1
To which subset(s) does the number –square root of twenty belong? Choose all that apply. (Irrational Numbers (Rational Numbers*** (Integers*** (Whole Numbers (Natural Numbers The maximum of choices is 2
Friday, August 12, 2016 by Anonymous

algebra 2
You toss a polybutadiene rubber ball 40 feet straight up from ground level. Each time it bounces, it rebounds 2/3 of the distance from which it fell. It continues bouncing indefinitely. How far does it travel before it comes to rest?
Friday, August 12, 2016 by Kate

Algebra
A plane traveled 400 miles to Rome and back. The trip there was with the wind. It took 5 hours. The trip back was into the wind. The trip back took 10 hours. - Find the speed of the plane in still air and the speed of the wind.
Thursday, August 11, 2016 by Willow

Algebra
When you reverse the digits in a certain two digit number you increase its value by 27. Find the number if the sum of its digits is 7.
Thursday, August 11, 2016 by Willow

Algebra simplifying fractions
10y2-5y/5y=
Thursday, August 11, 2016 by Farhana

Algebra
m2+mn/m2-mn
Thursday, August 11, 2016 by Anonymity

Algebra
In a class of 60 students, 4/5 are members of Math Club. Among the members, 3/5 are girls. How many boys are members of Math Club?
Thursday, August 11, 2016 by Jm

Algebra
Where do you insert parenthesis to make this equation true: 3x5+4-2x2+6-4=15
Thursday, August 11, 2016 by Jane

Pre-algebra
9 less than k
Wednesday, August 10, 2016 by Brooklyn

Algebra
Six less than three times a number is two more than four times the number.find the number
Wednesday, August 10, 2016 by Gina

Pre algebra
Write each of the following expressions without using absolute value. |x−y|, if x<y I reall dont get this please help
Wednesday, August 10, 2016 by cali

algebra
1.) The volume of a rectangular box is 64 ft3. If the width is 3 times longer than the height, and the length is 9 times longer than the height, find the dimensions of the box. Define your variables then show all work using the equation editor. Write a sentence that explains ...
Wednesday, August 10, 2016 by ashley

algebra
1.)If the airline charges $320 per passenger, find the profit made by the airline for flying 10,000 passengers from New York to Atlanta. Use the equation editor to show all work. Write a sentence to explain your answer. Remember: Profit = Revenue - Cost 2.)Approximate the ...
Wednesday, August 10, 2016 by brandon b

algebra
The airline cost for x passengers, measured in thousands of passengers, to travel round trip from New York to Atlanta is given by c(x)=^0.3x+1 where (c)x is measured in millions of dollars and x>0 Find the airline’s cost for 10,000 passengers (remember, that would NOT ...
Wednesday, August 10, 2016 by ayoma

Algebra 1
1. Which is an example of an algebraic expression? A. 4(3+8) B. 18^2 C. 3 - a*** D. 21 x 4 2. Which is an algebraic expression for 5 more than? A. 5z B. z + 5*** C. 5z + 5 D. 5 - z 3. Which word phrase can be used to represent the algebraic expression 4(21 + n)? A. 4 plus the ...
Tuesday, August 9, 2016 by Anonymous

Algebra
The present age of raj and ram is in the ratio 1:3. After 5 yrs rams age wiil be 2yrs more than twice of rajs age . Find their present ages
Tuesday, August 9, 2016 by Anonymous

Algebra Quadratic Functions
HOW DO YOU DO PART TWO? The performer stands on a tightrope 3m above ground and theows a diabolo upwards. In each throw , the height (ym) of the diabolo above the ground after s seconds is given by y=-s^2+3s+4 1) Find maximum height that the diabolo can reach My answer: 25/4 ...
Monday, August 8, 2016 by Rose

Algebra Quadratic EFuncyoon
David has 200m of fencing to enclose three identicle rectangular pens as shown in the figure. Let x be the length of each pen. a) express the total area of the pens in terms of x My answer: 2x^2-100x (It is correct according to the answer key) b) find the maximum total area of...
Monday, August 8, 2016 by Rose

Algebra/Quadratic Functions
The production cost (£C) ofa bicycle in a factory is given by the function C=2x^2-200x+5100, where x is the number of bicycles manufactured per day, find the number of bicycles manufactured per day such that the production cost is a minimum.
Sunday, August 7, 2016 by Rachel

college algebra
Use the associative law of addition to write an equivalent expression for (x+2)+y
Sunday, August 7, 2016 by Angelica

algebra
Robert is N years old. Robert's brother is 6 years younger than Robert.
Sunday, August 7, 2016 by Anonymous

algebra
I am trying to rationalize a denominator and it is a squre root, like this : squre root of x+1 , i don't know what to do ,cause it isn't just a number it is the whole expression. plz help
Saturday, August 6, 2016 by Maya

algebra 2
My data has a median of 4, a mode of 3 and a mean of 3.56. Would this mean my data set was normally distributed? I think my data set is not normally distributed but can someone just check my work for me?
Saturday, August 6, 2016 by Nina

algebra
how long would it take 1000 to grow to 5000 if I can get 5% compounded quarterly?
Saturday, August 6, 2016 by M

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Homework Help: Math