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March 2, 2015

Homework Help: Math: Algebra

Recent Homework Questions About Algebra

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Monday, March 2, 2015 at 8:59am

math
Mr. Smith has 100 students in his Algebra classes. The grades of a quiz are normally distributed with a mean of 70 and a standard deviation of 4. Sally claims that 75 students scored between 66 and 74 on this quiz. Given that this is normally distributed, is Sally correct? ...
Sunday, March 1, 2015 at 10:09pm

algebra
Mr. Smith has 100 students in his Algebra classes. The grades of a quiz are normally distributed with a mean of 70 and a standard deviation of 4. Sally claims that 75 students scored between 66 and 74 on this quiz. Given that this is normally distributed, is Sally correct? ...
Sunday, March 1, 2015 at 10:02pm

algebra
Mr. Smith has 100 students in his Algebra classes. The grades of a quiz are normally distributed with a mean of 70 and a standard deviation of 4. Sally claims that 75 students scored between 66 and 74 on this quiz. Given that this is normally distributed, is Sally correct? ...
Sunday, March 1, 2015 at 7:11pm

algebra
Jorge is painting a rectangular mural. Its length is 2 ft less than twice its width. Its area is 264 ft2. Find the dimensions of the mural.
Sunday, March 1, 2015 at 5:38pm

Algebra
James has a board that is 3/4 foot long he wants to cut the board into pieces that are each 1/8 foot long how many pieces can James cut from the board
Sunday, March 1, 2015 at 4:34pm

Algebra 2 Honors
Hi, I'd like some help with one of the questions on my math homework. It has to do with a right triangle. I'm not sure how to set it up or if I should use the pythagorean theorem. This is the question: Vista county is setting aside a large parcel of land to preserve it...
Sunday, March 1, 2015 at 4:25pm

algebra
A store sold 60 DVDs. Some of these were on sale and sold for $4.95 each, while the rest priced at $5.95 each. If the sales receipts for DVDs at the end of the day totaled $317.00, how many of each type were sold?
Sunday, March 1, 2015 at 4:00pm

Algebra
(16x^5*y^10/81xy^2)^(3/4) please explain how to do this, I am at a complete loss
Sunday, March 1, 2015 at 2:16pm

Algebra II
From 1990-1994 the mail order sales of health products can be modeled by S= 10t^3+115t^2+25t+2505 where S is the sales (in millions) and t the number of years since 1990. In what year were about $3885 million health products sold.
Sunday, March 1, 2015 at 11:38am

algebra
I an taking a pre test and I can't figure this question out at all--- 56x^7+21x^4+63^3
Sunday, March 1, 2015 at 8:25am

algebra
1. ratio a is equivalent to ratio b. ratio b is equivalent to ratio c. is ratio a equivalent to ratio c? 2. you are 13 years old, and your cousin is 19 years old. as you grow older, is your age proportional to your cousin's age?
Saturday, February 28, 2015 at 10:05pm

Algebra Answer ASAP thx!
(Rewrite each fraction with all the variables in the numerator) 8c^5/11d^4 e^-2
Saturday, February 28, 2015 at 8:40pm

linear algebra
1 0 2 −2 0 1 0 0 1 0 −1 −1 2 0 0 0 −1 2 1 0 Is the set S = {v1, v2, . . . , vk} linearly independent?
Saturday, February 28, 2015 at 8:30pm

Algebra
I need some help with this question I really don't understand it and some help going through this problem would be really appreciated :) Use the fact that a/b/c/d=a/b / c/d to simplify each rational expression. State any restrictions on the variables. x^2-1/x^2-9 / x^2+3x-...
Friday, February 27, 2015 at 6:35pm

algebra
will medal and fan graph the following table x y 1 8 2 35 3 62 4 89 help?
Friday, February 27, 2015 at 2:29pm

algebra
The ratio of quarters to dimes in a coin collection is 5:3. You add the same number of new quarters as dimes to the collection. a. Is the ratio of quarters to dimes still 5:3? b. If so, illustrate your answer with an example. If not, show why with a counter-example.
Friday, February 27, 2015 at 12:52am

algebra (check my answers?)
1. ratio a is equivalent to ratio b. ratio b is equivalent to ratio c. is ratio a equivalent to ratio c? yes 2. you are 13 years old, and your cousin is 19 years old. as you grow older, is your age proportional to your cousin's age? no
Friday, February 27, 2015 at 12:46am

algebra
Plus or minus of 0.05: As measured in standard deviations, how much is a year of learning in school worth on a test? Please answer with a decimal.
Friday, February 27, 2015 at 12:24am

algebra
two planes which are 1695 miles apart fly towards each other,their speeds differ by 65 mph,if they pass each other in 3 hours, what is the speed of each
Thursday, February 26, 2015 at 11:10pm

algebra
Please check The delivery truck makes more than 85 stops each day. X>85 In a densely populated area,a car's speed should not exceed 35 mi/h. X<35 The bakery had fewer than 8 loaves of bread left 8<x We expect at most 400 students to attend the football game. X>...
Thursday, February 26, 2015 at 10:10pm

Algebra II
what is an equation of a parabola with the given vertex and focus? Vertex: (-2,5); focus: (-2,6)
Thursday, February 26, 2015 at 9:25pm

Algebra
a new truck sells for 25,000 depreciates (decreases in value) 11% each year. What will be the value of the truck in 2 years? A: 11,000 B: 15,686 C: 17,624 D: 19,803 I think A
Thursday, February 26, 2015 at 8:08pm

Algebra 1
what is the solution of the following system of equations? 1.) 5x + 7y =3 2x = -3y +1
Thursday, February 26, 2015 at 6:56pm

algebra
The sum of two numbers is 70. One number is 10 more than twice the other number. Using Elimination find the numbers.
Thursday, February 26, 2015 at 6:33pm

algebra
What is the GCF of 5184 & that adds up to 150?
Thursday, February 26, 2015 at 6:13pm

linear algebra
Let V be the set of all real-valued continuous functions defined on R1. If f and g are in V, we define f ⊕ g by (f ⊕ g)(t) = f(t) + g(t). If f is in V and c is a scalar, we define c f by (c f)(t) = cf(t). Then V is a vector space, which is denoted by C(−&#...
Thursday, February 26, 2015 at 4:20pm

algebra
Have to write as inequality An artistbwithfrew $14 from a bank in each of the last three weeks and still has more than $65. How much did he start with? 14+3x>65?
Thursday, February 26, 2015 at 2:53pm

Math - Algebra
our riding your bike to the park, sit to read for a while, and then ride your bike home. It takes you less time to ride from the park to your house than it took to ride from your house to the park. Draw a sketch of a graph that shows your possible distance traveled over time. ...
Thursday, February 26, 2015 at 12:45pm

algebra
Linda has $235 in her savings account. She withdrew the same amount each week for 15 weeks. Her balance was then $55. How much money did Linda withdrawal each week?
Thursday, February 26, 2015 at 6:31am

Algebra 2
prime factorization of 15^6-7^6
Wednesday, February 25, 2015 at 9:52pm

algebra
Sarita,Clara,and Joe baked. muffins,which they shared equally. Clara ate one on the way home. She had 14 muffins left.How many muffins did Sarita,Clara, and Joe bake?
Wednesday, February 25, 2015 at 9:16pm

algebra
factor the polynomial 3x^2+3x-6
Wednesday, February 25, 2015 at 8:26pm

algebra
factor the polynomial 3h^2+11h+6
Wednesday, February 25, 2015 at 8:24pm

Algebra 1
solve each system using elimination. 1.) 6x - 3y =15 7x + 14y =10 Tell whether the system has one solution, infinitely many solutions, or no solution. 1.) 9x +8y =15 9x +8y =30 2.) 5x - 3y =10 10x + 6y = 20
Wednesday, February 25, 2015 at 7:39pm

Algebra 1
Solve each system using elimination. 1.) 5x - y=0 3x + y=24 2.) 3x + 3y =27 x - 3y =-11 3.) 6x +4y =42 -3x + 3y =-6
Wednesday, February 25, 2015 at 7:35pm

Algebra
How to simplify 6y (3y <squared -1) We are doing trinomials
Wednesday, February 25, 2015 at 6:35pm

Algebra
Factoring with a leading coefficient 3x^2+19x-72
Wednesday, February 25, 2015 at 5:05pm

Algebra 2
Given that f(x) = x² + 4x, evaluate f(-2).
Wednesday, February 25, 2015 at 4:31pm

Algebra
Bob and Ray are describing the same number. bob says the number is a positive even integer less than or equal to 20. Ray says the number is divisible by 4. If bobs statement is true, and Rays statement is false what are all the possible numbers? PLEASE HELP I need the answer ...
Wednesday, February 25, 2015 at 4:15pm

algebra-6th grade
what is a coefficient?
Wednesday, February 25, 2015 at 4:08pm

Algebra
How do I explain the steps for the answer I reached involving a^1/a^2 with the result of my answer of 1/a^3/2 ?
Wednesday, February 25, 2015 at 3:29pm

Algebra 2
D'Andre has decided that he needs to get more exercise, so he is building a running regimen for himself. He decides that, beginning on Sunday, he'll fun 10 feet. On each subseqeunt day he'll double the distance he ran the previous day. So he'll run 20 feet on ...
Wednesday, February 25, 2015 at 12:50pm

Algebra 2
D'Andre has decided that he needs to get more exercise, so he is building a running regimen for himself. He decides that, beginning on Sunday, he'll fun 10 feet. On each subsequent day he'll double the distance he ran the previous day. So he'll run 20 feet on ...
Wednesday, February 25, 2015 at 11:52am

Math Algebra
Explain why there are not a function f and an initial value x(sub)0, such that a function's first three iterates are x1=2, x2=2, and x3=8.
Wednesday, February 25, 2015 at 1:08am

Algebra 1
The balance oif a savings account can be modeled by the function b(t)=5000(1.024)^t, where t is the time in years, To model the monthly balance, a student writes: b(t)=5000(1.024)^t = 5000(1.024)^(1/12 * 12)^t = 5000(1.024^1/12)^12t = 5000(1.002)^12t Is the student correct? ...
Tuesday, February 24, 2015 at 11:16pm

Algebra 1
The number of concert tickets sold doubles every hour. After 12 hours, all of the tickets are sold. After how many hours are about one-fourth of the tickets sold? Explain your reasoning.
Tuesday, February 24, 2015 at 11:11pm

algebra
Please check A number p divided by 7 p/7 9 times a number a 9xa 6 times a number c, minus 5 6c-5 a nujmber m divided by m, plus 89 m/89 the product of 0.8 and a number y 0.8 x y 1/2 more than a number b 1/2+b I have to write an inequality need help An artist withdrew $14 from ...
Tuesday, February 24, 2015 at 10:59pm

Math - Algebra 1
The number of concert tickets sold doubles every hour. After 12 hours, all of the tickets are sold. After how many hours are about one-fourth of the tickets sold? Explain your reasoning.
Tuesday, February 24, 2015 at 10:39pm

algebra
75=m/3+10 27=-2Y+15
Tuesday, February 24, 2015 at 9:59pm

Algebra 1
-4x + 9y=9 x-3=-6
Tuesday, February 24, 2015 at 9:45pm

algebra
6(5y-4) 30y-24 -3+2(6z-3+4)
Tuesday, February 24, 2015 at 9:44pm

Algebra 1
5x + y= 9 10x-7y=18
Tuesday, February 24, 2015 at 9:44pm

Algebra 1
7x + 2y = 24 8x + 2y = 30
Tuesday, February 24, 2015 at 9:43pm

Algebra
Solve by factoring. n^2+n-12=0 I know i would need to factor it and then use the zero product property, but there is a variable instead of a variable attached with a constant. for example, k^2+7k+12=0 so it must be (k+3)(k+4) because k*k=k^2, 4+3=7 and 4*3=12. But there is no ...
Tuesday, February 24, 2015 at 9:38pm

Algebra 1
Tell whether the system has one solution, infinitely many solutions, or no solution. 1.) y= 1/2x +3 2y -x =6 2.) x= -7y + 34 x+ 7y =32
Tuesday, February 24, 2015 at 6:20pm

Algebra 1
solve each system by substitution. check your answers 4y +3 = 3y +x and 2x +4y =18
Tuesday, February 24, 2015 at 6:10pm

algebra
Find the quotient when (2x^2+5x+2) is divided by (x+2). *** Can someone tell me if i got this answer right if not correct it*** Answer: (2x+1)
Tuesday, February 24, 2015 at 6:08pm

algebra
The area of a rectangule is (2x^2-11x+5). If the length is (2x-1), find the width.
Tuesday, February 24, 2015 at 6:01pm

algebra
The area of a rectangular kitchen table is (t^2-7t-8) . Find the dimensions of the table.
Tuesday, February 24, 2015 at 5:54pm

algebra
Find the quotient when (x^2+x-6) is divided by (x-2)
Tuesday, February 24, 2015 at 5:45pm

Algebra
Find the quotient when (x^2-3x-4) is divided by (x+1).
Tuesday, February 24, 2015 at 5:39pm

Math - Algebra 1
You deposit $9000 in a savings account that earns 3.6% annual interest compounded monthly. You also save $40 per month in a safe at home. Write a function C(t) = b(t) + h(t) where b(t) represents the balance of your savings account and h(t) represents the amount in your safe ...
Tuesday, February 24, 2015 at 5:03pm

Algebra 2
Describe an infinte geometric series with a beginning vaule of 2 that converges to 10. What are the first 4 terms of the series? I know r=4/5 Now what do I do
Tuesday, February 24, 2015 at 12:53pm

algebra
The path that a football takes can be described by the equation h= 25t-5t^2 where h is the height in meters, of the football, at time t, in seconds.After how many seconds will it be 20 meters high? 5t^2-25t+20+0 5(t^2-5t+4)=0 5(t-4)(t-1)=0 t-4=0 t=4 t-1=0 t=1
Tuesday, February 24, 2015 at 11:35am

ALGEBRA
given the function rule f(x)=x^2-3x+2, what is the output of f(-2) a -8 b 0****** c 4 d 12 What are the first four terms of the sequence represented by the expression n(n-1)-5? a -7,-5,-3,1 b -5,-10,-15,-20 c 0,2,6,12 d -5,-3,1,7******
Tuesday, February 24, 2015 at 8:13am

algebra
3x+4<19
Tuesday, February 24, 2015 at 12:49am

algebra
Please check A number m decreases by 4 m-4 A number d divided by k,minus 6 D/k-6 A number b less 8 B-8 The sum of a number m and 10 M+10 18 divided by a number r 18/r 32 decreased by a number n 32-n A number k increased by itself K+k
Tuesday, February 24, 2015 at 12:33am

algebra
Sandra has ribbons that are 3/4 yard, 2/6 yard, and 4/7 yard long. She needs to use the ribbon longer than 2/3 yard to make a bow. Which length of ribbon could she use for the bow.
Monday, February 23, 2015 at 9:22pm

algebra
I am confused on how to solve this. 4/(x+4) + 4/5 =5/2
Monday, February 23, 2015 at 9:09pm

Algebra
Determine the solution set of 2x-3y<6 4x+4y<8 do I graph this?
Monday, February 23, 2015 at 6:09pm

Algebra
Given: f(x) = 3x + 4 and g(x) =1/4x -3 find: (a) g(f(x)) (b) f(g(-2)) (c) when f(g(x)) = 5
Monday, February 23, 2015 at 6:07pm

Algebra
The sum of two numbers is 6. The result when the greater number is decreased by twice the lesser is 9. Let x be the greater number and y be the lesser number. Find the numbers. Thank you
Monday, February 23, 2015 at 5:29pm

algebra
A package of modeling clay was shaped like a cone with a radius of 25 cm and a height of 7.2 cm. Miriam used all the clay to make a cylinder with a radius of 15 cm. What was the height of the cylinder? Express the answer to one decimal place and use 3.14 to approximate pi. cm
Monday, February 23, 2015 at 5:27pm

algebra
write each number in scientific notation 1) 0.000089 2) 456.981
Monday, February 23, 2015 at 5:23pm

algebra
A package of modeling clay was shaped like a cone with a radius of 25 cm and a height of 7.2 cm. Miriam used all the clay to make a cylinder with a radius of 15 cm. What was the height of the cylinder? Express the answer to one decimal place and use 3.14 to approximate pi. cm
Monday, February 23, 2015 at 5:13pm

algebra
1. 5x^(-4) 2. 1/x^(-5) 3. (14a^3) (-2a^2) 4. 7g^4 g^(-1) 5. (3x)^3 x^5
Monday, February 23, 2015 at 5:12pm

Algebra
Billy watchedb the clown car drive up to the circus and saw 14 clowns get out of one little car the clowns made up 56% of the performers in the circus how may performers were in the circus
Monday, February 23, 2015 at 4:53pm

Algebra
The current of a river moves at 3 miles per hour. It takes a boat 3 hours to travel 12 miles upstream, against the current, and return the same distance traveling downstream, with the current. What is the boats rate in still water?
Monday, February 23, 2015 at 3:42pm

algebra
A 24 meters pole is held by a three guy wire into vertical position. Two of the guy wires are of equal length. The third wire is 5 meters longer than the other two and is attached to the ground 11 meters farther from the foot of the pole than the two equal wires. Find the ...
Monday, February 23, 2015 at 3:16pm

Algebra
Spheres 1) Find the surface area for a sphere with a radius of 10 feet. Round to the nearest whole number. :1,256ft^2*** :4,189ft^2 :1,089ft^2 :1,568ft^2 2) Find the volume of a sphere with a radius of 10 feet. Round to the nearest whole number. :1,257 ft^3 :4,187 ft^3*** :1,...
Monday, February 23, 2015 at 2:44pm

Pre-Algebra
1.) if m<1=43 what is m<4? a: 53 b: 43 c: 37 d: 47 2.) if m<1=55 what is m<5? a: 55 b: 40 c: 35 d: 25 3.)if m<4=25 wht is m<8? a: 105 b: 75 c: 175 d: 25
Monday, February 23, 2015 at 12:43pm

Algebra 2
Because of friction and air resistance, each swing of a pendulum is a little shorter than the previous one. The lengths of the swings form a geometric sequence. Suppose the first swing of the pendulum has an arc length of 100cm and a return swing of 99cm. On which swing will ...
Monday, February 23, 2015 at 11:04am

algebra
How can I find the Domain and Range for y=1/-x -2 And y=-4/x-4 +4 they also ask me to compare these 2 problems with graph of y=1/x please help me solve these algebra problems.
Monday, February 23, 2015 at 10:45am

linear algebra
Which of the given subsets of R3 are subspaces? (a) The set of all vectors of the form [a;b;0] b)The set of all vectors of the form [a;b;c] where a > 0. c) The set of all vectors of the form [a;c;c] d) The set of all vectors of the form [a;b;c] where 2a − b + c = 5.
Monday, February 23, 2015 at 10:16am

Algebra 2
Multiplying or dividing rational expressions 6x^2 + 13x - 5 divide by 6x^2 -23x + 7 Need to show my work.
Sunday, February 22, 2015 at 11:20pm

Algebra 2
4x (to the 6th) ____________ 2x-6
Sunday, February 22, 2015 at 10:46pm

Algebra 2
6x squared + 13x -5 _________________ 6x squared -23x +
Sunday, February 22, 2015 at 10:46pm

Algebra
Find the recursive formula of the sequence below: 12, 24, 36, 48
Sunday, February 22, 2015 at 10:14pm

Algebra 2
Solve the equation x^3 - 3x^2-22x+24=0 do you use a graph?
Sunday, February 22, 2015 at 9:39pm

Algebra 2
Solve the equation log2(x^2-20) - log2X =3 the two is the base*
Sunday, February 22, 2015 at 9:38pm

Algebra 2
Solve the equation : 8^2x-1 = 16^x+1 i know you have to log both sides log8^2x-1 = log16^x+1 and then you use the exponential rule 2x-1 log8 = x+1 log16 but then i dont know what to do...
Sunday, February 22, 2015 at 9:07pm

Algebra
Write a detailed solution to the system x 1 3y # 9 y # 22x 1 6, where x $ 0 and y $ 0. Graph the system to show all possible solutions.
Sunday, February 22, 2015 at 9:06pm

Algebra 2
solve the equation x^2 - 3x^2-22x+24=0 do you use a graph?
Sunday, February 22, 2015 at 8:53pm

Algebra 2
Realtors in a Florida community have found that the average price of a four bedroom house varies inversely with the distance that the house lies away from the beach. If, on average a four bedroom house located 2 miles from the beach cost $750,000, What is the average cost of ...
Sunday, February 22, 2015 at 8:10pm

Algebra 2
for the functions f(x) = 5x +50 and g(x) = 1/5x -10 evaluate both f(g(x)) and g(f(x)). Are these functions inverses? do you put them into each other?
Sunday, February 22, 2015 at 7:06pm

Algebra
If x is the remainder when 2312, 1417, and 1059 are all divided by y (where y is greater than one), find the value of y – x.
Sunday, February 22, 2015 at 5:51pm

linear algebra
Which of the given subsets of R3 are subspaces? (a) The set of all vectors of the form [a;b;0] b)The set of all vectors of the form [a;b;c] where a > 0. c) The set of all vectors of the form [a;c;c] d) The set of all vectors of the form [a;b;c] where 2a − b + c = 5. ...
Sunday, February 22, 2015 at 5:28pm

Algebra
The fifth term of an arithmetic sequence is 22 and the 15th term is 62. Find the 100th term and the sum of the first 60 terms
Sunday, February 22, 2015 at 4:32pm

algebra
noj has the following test scores 69 74 76 84 91 his teacher will allow him to retake the test on which he scored lowest noj wants an average of at least 82 determine the least number of additional points noj must score on the retest
Saturday, February 21, 2015 at 4:29pm

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