Answer:
see explanation
Step-by-step explanation:
given
f'(x) = 12cos x - 4sin x, then
f'(
) = 12cos() - 4sin()
[ cos() = -cos(
), sin( = - sin() ]
= -12cos() + 4sin()
= - 12 × 
+ 4 × 
= - 6 + 2
≈ - 2.536 ( 3 dec. places )
X = 3 and y = -1
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Answer: x = 2 and z=78
Step-by-step explanation:
Opposite angles are non-adjacent angles formed by two intersecting lines. Opposite angles are congruent (equal in measure). Z is Opposite to 78 angle, so z=78.
Adjacent angles add up to 180 degrees, and 78 and (5x + 92) are adyacents so:
5x + 92 + 78 = 180
5x + 170 = 180
5x = 180 - 170
5x = 10
x = 10/5
x = 2
I’m pretty sure that’s true.
<span>48/70=0.6857
</span><span>0.6857x100=68.57%</span>
