Answer:
-128
Step-by-step explanation:
-2*-2*-2*-2*-2*-2*-2=-128
This y= −18x−2 has slope equal -18
perpendicular line, slope is opposite and reciprocal so slope = 1 /18
equation:
y + 3 = 1/18( x + 2)
or
y = 1/18 x - 26/9
X + y = 90
y = 90 - x
0.15 x + 0.75 y = 0.51 (90)
0.15 x + 0.75 (90-x) = 0.51 (90)
0.15x + 67.5 -0.75x = 45.9
21.6 = 0.6 x
x = 36 kg -- 15% Cu
y = 90 - x
y = 90 - 36
y = 54 kg -- 75% Cu
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-1 x 8 = -8
When multiplying values with exponents, add them
15 + 4 = 19
Thus, the answer is -8p^19
When the exponents are separated by brackets, multiply them
2 x 3 = 6
-1 x 0.15 = -0.15
Now add the exponents
6 + 4 = 10
Thus, the answer is -0.15^10
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