<u><em>Answer:</em></u>
<u><em>-31</em></u>
<u><em>Step-by-step explanation:</em></u>
<u><em>Lets substitute the values that are given to us.</em></u>
<u><em>-10 - 7{-7 - (-10)}</em></u>
<u><em>=> -10 - 21</em></u>
<u><em>=> -31</em></u>
<u><em>Please give me brainliest :)</em></u>
<u><em /></u>
Let x = ounces of $35 perfume
Let y = ounces of $15 perfume.
We want a 3-ounce perfume, therefore
x + y = 3
or
y = 3 - x (1)
We want the 3-ounce perfume to cost $63. Therefore
35x + 15y = 63 (2)
Substitute (1) in (2).
35x + 15(3 - x) = 63
35x + 45 - 15x = 63
20x = 63 - 45 = 18
x = 18/20 = 0.9
From (1), obtain
y = 3 - 0.9 = 2.1
Answer:
0.9 ounces of $35 perfume and 2.1 ounces of $15 perfume.
<u>EXPLANATION</u>
The reason is that
If we multiply by its conjugate
We obtain;
This is difference of two squares so we obtain;
This further gives us,
Since the , we substite to get;
The is now eliminated and we get,
Are there answer choices?
M ÷ n
m =
n = 3
÷ 3
Multiply
by the reciprocal of 3 which is
=
×
=
=