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March 17, 2014

# Homework Help: Math Help! Ms. Sue! Damon! Steve!

Posted by Jman on Friday, September 13, 2013 at 5:04pm.

I have tried doing these and I can't figure them out. These are 7 question taken from a 50 question test thingy, so these are all they one I cant figure out. Thanks for your help.

Is the equation true, false, or open?

5x + 2 = 6x + 11

a. Open; there is a variable.

b. True; the expressions are the same for all values of the variables.

c. False; the expressions are never the same.

Which ordered pair is a solution of the equation y = x  3?

a. (2, 5)

b. (5, 2)

c. (2, 5)

d. (5, 2)

Which ordered pair is a solution of the equation y = 5x?

a. (2, 10)

b. (5, 25)

c. (3, 15)

d. (2, 10)

Which ordered pair is a solution of the equation y = 7x + 2?

a. (1, 2)

b. (8, 54)

c. (5, 35)

d. (1, 7)

Which equation is an identity?

a. 11  (2v + 3) = 2v  8

b. 5w + 8  w = 6w  2(w  4)

c. 7m  2 = 8m + 4  m

d. 8y + 9 = 8y  3

Solve the following equation.

2(h  8)  h = h  16

a. h = 8

b. h = 8

c. infinitely many solutions

d. no solution

Solve the following equation.

3 + 6z = 13 + 6z

a. z = 5/6

b. z = 22/3

c. infinitely many solutions

d. no solution

• Math Help! Ms. Sue! Damon! Steve! - Jman, Friday, September 13, 2013 at 5:06pm

Opps! I didn't number them! Oh well.......

• Math Help! Ms. Sue! Damon! Steve! - Jman, Friday, September 13, 2013 at 5:17pm

Anybody?

• Math Help! Ms. Sue! Damon! Steve! - Steve, Friday, September 13, 2013 at 7:04pm

5x + 2 = 6x + 11
-x = 9

Since you don't have an equation which is always true or never true, it is open.
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y = x  3
what, you can't look at the given pairs and see which has y =x-3?
----------------------------------------
(d)
----------------------------------------
(b)
----------------------------------------
(b) Just simplify both sides
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(d) simplify both sides and you have an impossibility
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(d) same thing

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