Wednesday, January 5, 2011

Algebra Question and Answers

Lots of student thinks that algebra questions are very difficult but if you break the problem and solve the problem step by step then you can easily solve your algebra questions.  We have provided the following examples questions and if you still not is clear then do contact us. I have done engineering with 5 years of experience. I can solve your assignment. Please e-mail me your assignment. I assure you that you will get A++ grade.

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Question 1
9x + 2y = -61 …………. (1)
X = 1 – 8y  ……………  (2)

Answer:
Substitute value of x in equation 1 , we get
9(1 – 8y) + 2y = -61
  • 9 – 72y +2y = -61
  • Y =  70/70 = 1
 Substitute value of y in x , we get x = 1 -  8 = -7
 Solution is (-7,1).

Question 2
Determine whether (-5,2) is a solution of 5x-9y=4

Answer:
Put (-5, 2) in 5x – 9y = 4 

We get 5*(-5) – 9*2 = -25 – 18 = -43 which is not equal to 4 thus it is NOT a solution of this problem.

Question 3
Translate to an algebraic expression.  The product of 36 percentages and some number

Answer:
Let x be any some number and 36% of this number = 36x/100 = 0.36x

Question 4
Use the distributive property to solve the following questions

5(w-2) = -10

Answer:
5(w - 2) = 10
=>  5w – 10 = 10 => 5w = 20 => w = 4

Question 5
simply
9(32 – (56 - 33))

Answer:
9(32 – (56 - 33)) = 9(32 – 23 ) = 9*9 = 81

Question 6 
 Train A and B are traveling in the same direction on parallel tracks. Train A is traveling at 80 miles per hour and train B is traveling at 84 miles per hour. Train A passes a station at 7:25 PM. If tran B passes the same station at 7:55 PM.  At what time train B catch up to train A?

Answer:
Let x be the distance travelled by the train from the station 

Since Train A start its journy ½ hr before the train B start its journey. 

Suppose after t hrs both trains will meet . Thus x  = 80 (t + 1/2)
X  = 84(t)

From both equations,  80t + 40 = 84t
  •     4t = 40 => t = 10 hrs
  •     Thus after 10 hrs both trains will meet.  
Question 7
Graph the following equations
Y >= -3
x>= 5

Answer:




Question 8
5x/8 + x/16 = 3/16 + x

Answer:
11x/16 – x = 3/16
-5x/16 = 3/16
x = -3/5 

Question 9
-18 <= 4x – 7

Answer:
  -18 + 7 <= 4x
  -11 <= 4x        =>  -11/4 <= x  

And
4x – 7 <= -6
4x <= -6 + 7
4x <= 1
X <= ¼ 
Thus -11/4 <= x <= ¼  

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