Answer:
the answer is option 4 hope it helps
X + 3y + 5z = 45
6x - 3y + 2z = - 10
------------------------add
7x + 7z = 35
6x - 3y + 2z = -10
-2x + 3y + 8z = 72
----------------------add
4x + 10z = 62
7x + 7z = 35....multiply by 4
4x + 10z = 62...multiply by -7
---------------------
28x + 28z = 140 (result of multiplying by 4)
-28x - 70z = - 434 (result of multiplying by -7)
--------------------add
- 42z = - 294
z = -294/-42
z = 7
4x + 10z = 62
4x + 10(7) = 62
4x + 70 = 62
4x = 62 - 70
4x = - 8
x = -8/4
x = -2
x + 3y + 5z = 45
-2 + 3y + 5(7) = 45
-2 + 3y + 35 = 45
3y + 33 = 45
3y = 45 - 33
3y = 12
y = 12/3
y = 4
solution is (-2,4,7) <==
Answer:
<h2>10</h2>
Step-by-step explanation:
<span>Jake
has 1 yard of cloth. He makes bookmarks that are each 1 1/8 inches long.
Let’s find out how many bookmarks can he make.
Unit of conversion:
=> 1 yard = 36 inches.
Now, he divided it to 1 and 1/8 inches
=> 1 and 1/8 = 1.125 inches
So let’s divide this with 36 inches
=> 36 / 1.125 = 32
Thus jake can make a total of 32 bookmarks out of 1 yard of cloth with a
measurement of 1 and 1/8 inches.
</span>
If i were you, i would add one to 7x and fifteen. this gives you x^2+8x+16, a perfect square of x+4.