Questions on Algebra: Expressions involving variables, substitution answered by real tutors!

Tutors Answer Your Questions about Expressions-with-variables (FREE)

Question 432900: Hello to all. Had a question.
0.4x+8<=1.2x-9 the solution is {x|x_ _} what is _ and _. thank you
Click here to see answer by MathLover1(6627)

Question 432939: solve by subsitution method 2x+8y=6 4x+8y= -36
Click here to see answer by Lstark01(4)

Question 433034: Powers of Powers= (st) power of 6 can't get it to write it.

Click here to see answer by katealdridge(100)

Question 433075: Please solve using substitition method: 4x-3y=10 x=5-2y Thanks.
Click here to see answer by ewatrrr(10682)

Question 433104: a*a*a*a*b*b
Click here to see answer by ewatrrr(10682)

Question 433221: -2(x+1)-3=-9
Click here to see answer by jorel1380(2518)

Question 433226: 80 decreased by 6 times a number is = to 4 times the same number what is that number?
Click here to see answer by algebrahouse.com(1079)

Question 433355: Factor completely, or state that the polynomial is prime.

Click here to see answer by robertb(4012)

Question 433357: I need help solving the following problem.... 4(x+4)=6(x-2)
the answer must be in simplitied form.
Click here to see answer by Alan3354(30993)

Question 433446: Could someone please show me step by step how to find the given function h(w)=9w+3 in each of the following h(6),h(-10),h(6.6)
Click here to see answer by Alan3354(30993)

Question 433532: 4+6*2-3*3++1

Click here to see answer by rfer(12657)

Question 433687: I need to solve the system of equations by the substitution method
y=3x+1
3y-5x=11
Can someone help please I have problems understanding the substitution method Thank you all so much.
Click here to see answer by psbhowmick(529)

Question 433686: Solve the system of equations by using the substitution method
2x-5y=25
y=x-8
I need the ordered pair
Can someone please help I have a lot of difficulties with algebra and your help is appreciated.
Click here to see answer by psbhowmick(529)

Question 433708: 2r - 3s =-3
3r+2s=28
solve by the elimination method
Click here to see answer by Alan3354(30993)

Question 433708: 2r - 3s =-3
3r+2s=28
solve by the elimination method
Click here to see answer by rwm(914)

Question 433708: 2r - 3s =-3
3r+2s=28
solve by the elimination method
Click here to see answer by blwinbbbles(106)

Question 433948: THe length of a rectangle is 2ft longer than its width. If the perimeter of a rectangle is 44ft, find its area?
Click here to see answer by Sarpi(32)

Question 433976: Two angles are complementary. The sum of the measure of the first angle and half the second angle is 89.5 degrees. What is the measure of the smaller angle? What is the measure of the other angle?

Please help. Thank you
Click here to see answer by shree840(260)

Question 433994: Hello. May I have some assistance. I have a test and am having trouble with some. here it is. Solve by substitution method. 8x+6y=-2 and -6x+y=51 must be typed as an ordered pair. thank you
Click here to see answer by stanbon(57308)

Question 433999: One canned juice drink is 20% orange juice, another is 10% orange juice. How many liters of each should be mixed together in order to get 10L that is 17% orange juice.
Click here to see answer by mananth(12270)

Question 434003: Hello. Here was another question I had. Thank you for your time. Use ellimination method to solve. 3x+3y=21 and 9x-3y=-33. What is the solution.
Click here to see answer by shree840(260)

Question 434023: Hello again . Here is the question. (Solve by elimination method)
4x+5y=4 and 8x+10y=8 what is the solution? thank you
Click here to see answer by richard1234(5390)

Question 434116: The sum of three integers is -97. The second integer is twice the third, and the first integer is 3 more than the second integer. What is the smallest integer?
Click here to see answer by mananth(12270)

Question 434174: a balls height in feet can be described by the function p(t)=-16t^2+128x+8, where t is time in seconds

Click here to see answer by Alan3354(30993)

Question 434282: Solve using the elimination method
5u+2v= -17
3u+v= -5
Type an ordered pair
Help me please? thanks so much
Click here to see answer by solver91311(16877)

Question 434275: If a plane can travel 490 mph with wind and 430 mph against the wind, find the speed of the plane without a wind and the speed of the wind.
The speed of the plane in still air is how many mph?
The speed of the wind is how many mph?
I have major problems with word problems can I get some help with this one? Thanks
Click here to see answer by ankor@dixie-net.com(15649)

Question 434271: Solve using the substitution method
x-4y=12
2x-8y=16
Simplify your answer and type an ordered pair

goodness I think this is the last of these can someone please help me with it? Thank you!!!
Click here to see answer by scott8148(6628)

Question 434264: The perimeter of a rectangle is 32 ft. The length is 2 ft. longer than the width. Find the dimensions. Write a system of linear equations and solve the resulting system. Let x be the length and y be the width.
What is the length ? ft.
What is the width ? ft.
Could someone please help me I would appreciate it. Thanks
Click here to see answer by scott8148(6628)

Question 434070: Hello again . Here is the question. (Solve by elimination method)
4x+5y=4 and 8x+10y=8 what is the solution? thank you

Click here to see answer by scott8148(6628)

Question 434267: Solve using the substitution method
y=3x+1
3y-7x=9
Simplify your answer and type an ordered pair
Here is another one I have difficulty with the substitution method, can someone please help me? Thanks again
Click here to see answer by ankor@dixie-net.com(15649)

Question 434679: xy=8
2x+3y+8=0
it says solve the simultaneous equations.please assist
Click here to see answer by solver91311(16877)

Question 435107: Consider the quadratic function y+x^2+x-2
Determine a)the y-intercept
b) the axis of symmetry
c)the x-intercepts
d)the vertex
use the informations above to sketch the graph of y=x^2+x-2
Click here to see answer by stanbon(57308)

Question 435106: d=(n+2)/p solve for p
g=(T+Mf)/M solve for M
G=(2k+m/(k-n) solve for k
Click here to see answer by stanbon(57308)

Question 435181: I think I'm missing a step in my answer to this problem, did I simplify this right? help?
84 - 26 x 3 + 98 / (-7)
=84-78-14
= 84-92= -8

Click here to see answer by Alan3354(30993)

Question 435201: two numbers their sum is 43 and their product is 405 . what are the difference of this two numbers ?
Click here to see answer by Alan3354(30993)

Question 435297: Hello. This a problem I am having trouble with in my lesson called the "Addition Method". I have to find the solution to the system of equations or, in other words, the ordered pair that results from solving and substituting. I'm sure you already understand that though. :) Thanks in advance. (It is a multiple choice question so the 3 options are below where it says "The solution to the system of equations is _____.")
7x - 3y = 4
2x - 4y = 1
The solution to the system of equations is _____.
--(13/34, -15/34)
--(3/22, -7/22)
--(13/22, 1/22)

Click here to see answer by stanbon(57308)

Question 435304: Simplify
(1 + 10/y) / (1 - 100/y^2)

Click here to see answer by poopstainonmath(4)

Question 435304: Simplify
(1 + 10/y) / (1 - 100/y^2)

Click here to see answer by Alan3354(30993)

Question 435327: 1)Two cars leave town going in opposite directions. One car is traveling 60 miles per hour (mph), and the other car is traveling 50 mph. How long will it take before the cars are 220 miles apart?
2)Which point lies in the solution set for the following system of inequalities?
y < 2x + 4
y < -2x + 2
3)What is the value of the x variable in the solution to the following system of equations?
4x + 3y = 10
4x + 5y = 14
4)Solve the following system of equations.
3x - 2y = 6
6x - 4y = 14
5)Use the Substitution Method to solve the following system of equations.
x - 4y = 1
2x - 9y = 3

6)Trevor's dad decided to get him a cell phone for his birthday. Cell Plus has a plan that costs $25.00 per month plus an additional $0.06 per minute. Cell Best has a plan that costs $30.00 per month plus an additional $0.05 per minute. How many minutes can Trevor talk and both cell plans cost the same amount?
7) For the following system, if you isolated x in the second equation to use the Substitution Method, what expression would you substitute into the first equation?
2x + y = 8
-x - 3y = -12
8)Fun Land theme park has a total of 110 males and females who are employed at the park. If the number of males is 10 more than three times the number of females, how many males are employed at the park?

9)There were 150 freshman and sophomores at the high school musical Reese and her friends attended. Freshman tickets were $2.00 each and sophomore tickets were $3.00 each. The receipts for freshman and sophomore tickets totaled $390. How many sophomores bought tickets?

10)Solve the following system of equations. Please show your work to receive full credit.
x - y = 10
2x + y = 2
Part 2:
Explain which method you chose to solve the system and why you felt it was the best choice.
Thank you!
Click here to see answer by richard1234(5390)

Question 435728: Factor completely:y^2-16
Click here to see answer by nerdybill(6958)

Question 435732: Factor Completely: 2x^2y^2z+4xy^2-6y^2
Click here to see answer by rwm(914)

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