Add. Express your results in simplest form.
It Reads: 3z-1 over 4 + z-7 over 4
3z - 1 + z - 7
4 4
2006-06-20 05:12:26 · 16 answers · asked by Brandon ツ 3 in Science & Mathematics ➔ Mathematics
If I'm understanding you right, it is (3z - 1)/4 + (z-7)/4.
They are already in like terms, so you can add them across:
3z + z = 4z and -1+ -7 = -8, so now you have
(4z - 8)/4.
Now you need to simplify your fraction: 4z/4 = z and -8/4 = -2.
Now you are left with z - 2.
2006-06-20 05:19:20 · answer #1 · answered by KansasSpice 4 · 2⤊ 1⤋
The majority is correct here.
First, the denominators are the same, so you can just add the numerators. (3z-1) + (z-7) = 4z-8, so now you have (4z-8)/4.
You can factor a 4 out of the top to get 4(z-2)/4. Cancelling a 4 out of the numerator and denominator you get (z-2)/1 which equals z-2.
By the way, I hope you take the time to learn to do this on your own and not let other people do your homework for you.
2006-06-20 05:28:57 · answer #2 · answered by Cara B 4 · 0⤊ 0⤋
Your not too clear on this expression, so there is confusion over your answer. From what can be guessed, you have two possibilities:
1. If the expression is {(3z-1)/4}+{(z-7)/4}, then the simplest form is z-2
2. If the expression is (3x-1)/{4+(z-7)/4}, then the simplest form is 12z(squared)+112z+36
2006-06-20 05:42:41 · answer #3 · answered by Jeffrey S 6 · 0⤊ 0⤋
I understand the question as
(3z-1)/ { 4 + [z-7]/ 4}.
Multiply up and down with 4:
4(3z-1)/ { 16 + [z-7]} =
4(3z-1)/(z+9). That's it.
OR
3z-1 over 4 + z-7 over 4 =
(3z-1)/4 + (z-7)/4 =
[(3z-1) + (z-7)] / 4 =
[ 4z - 8 ] / 4 = z - 2
2006-06-20 05:23:20 · answer #4 · answered by Thermo 6 · 0⤊ 0⤋
(3z-1) / 4+(z-7) / 4
=3z-1+z-7 / 4
=4z-8 / 4
=4(z-2) / 4
=z-2
2006-06-20 05:21:04 · answer #5 · answered by s13_nush 1 · 0⤊ 0⤋
3z-1+z-7 = 4z-8 over 4 = 4z-2 over 1 = 4z-2
I'm guessing this is right
2006-06-20 05:20:34 · answer #6 · answered by chitownvski 1 · 0⤊ 0⤋
Now this is a guess:
= 4z - 8 over 4 over 4 = z-2 over 4 = 4z-4 over 4 = z-2
2006-06-20 05:16:44 · answer #7 · answered by overlord_1138 4 · 0⤊ 0⤋
what ever happened to 3+ 4= 7
2006-06-20 05:28:06 · answer #8 · answered by borg 1 · 0⤊ 0⤋
(3z-1) + (z-7)
------- ------
4 4
becomes:
(3z-1) + (z-7)
-----------------
4
because of the common denominator. Then it becomes:
3z-1 + z -7
--------------
4
because of order of operations, which just makes it
4z-8
------
4
when adding up the common variables. Factor out the 4, and you get:
z-2, which is the simplest form.
2006-06-20 05:22:14 · answer #9 · answered by lawman04 2 · 0⤊ 0⤋
= (3z-1+z-7)/4
=(4z-8)/4
=z-2
2006-06-20 05:20:12 · answer #10 · answered by sunil 3 · 0⤊ 0⤋