Homework Help: Algebra

Posted by lizzie on Saturday, August 6, 2011 at 8:58pm.

I am trying to find out if my answer's are correct. Can someone please verify.

What is the equation for the line that passes through the (-2,2) and has a slope of 5?
Answer-
Y=5x + 2
Y=5x +12
Y=5x -2
None of these 每 I believe this is the answer

Find the value of x^3+□2x■^2-3 when x =3.
Answer- 42

Solve 5x+3=13 for x.
Answer-2

Compare the quantity in Column A with the quantity in Column B.
Column A Column B
The solution of The solution of
2(x-3) = 6x 3x + 2 + 5x + 6
Answer-The quantity of Column B is greater

Solve for x in |x-3| >8.
Answer-

Compare the quantity in Column A with the quantity in Column B.
Column A Column B
6z-5 if z=-2 -6z 每 5 if z = 2
Answer-The quantities are equal

What is the equation for the line that passes through the point (5, 5) and a slope of 2?
Answer-y=2x+ 2

Evaluate □2y■^(2 ) (x+y) when x =8 and y+3
Answer-198

Solve 5x-4 = 41 for x.
Answer-9

What is the equation for the line that passes through the point (0, 0) and has a slope of -1/2?
Answer-y=1/2x

Which is the solution of 2x + 5 > -1?
Answer-
X > 6
X < -6
X > 2
None of these- I believe the answer is this one

Algebra - Reiny, Sunday, August 7, 2011 at 12:35am
1. none of the given answers is correct
2. can't make out your typing
3. 5x 3 = 13
5x = 10
x = 2

4. ??

5. |x-3| >8
x-3 > 8 or -x + 3 > 8
x > 11 or x < -5

6. ???

7. your point doesn't satisfy your equation, you should have realized that by substituting it back in.

equation is y = 2x + b
plug in the given point (5,5)
5 = 10 + b
b = -5 , so ......... y = 2x - 5can't make out your typing

8. can't make out your typing

9. your answer should be +9 , not -9

10. correct

11. 2x + 5 > -1
2x > -6
x > -3 , so none of the ones given
Algebra - lizzie, Sunday, August 7, 2011 at 8:11am
Find the value of x^3+□2x■^2-3 when x =3.

I don't know how to type x to the 3rd power it keeps putting a little triangle there. How do I do this? When I type it here or in word it does the same thing. Help!
Algebra - MathMate, Sunday, August 7, 2011 at 9:05am
Typing here is done using the HTML codes. They are NOT the same as in Microsoft Word. If you copy and paste Microsoft Word documents, be sure that symbols show up correctly before and after you have sent your post.

x^3 means x to the third power, or you can type it as x³, or :
x & s u p 3 ;
but without the spaces between the characters.

What we do not understand are:
□ and ■, do they actually mean ( and )?

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