Answer:
1,-10 and 2,-8
Step-by-step explanation:
If you substitute each answer choice:
6+-10=4
12+-8=4
12+8=4
6+2=4
The only ones that would make sense are the first and second one.
Answer:
The answer is the last one.
Step-by-step explanation:
When you do the others , they are step by step but when you do the last one, its just one step, which is -100.
Hope this helps :)
Recall that 2sin(x) cos(x) is actually equal to sin(2x).
We can prove this by expanding sin(2x) to sin(x + x).
sin(x + x) = sin(x) cos(x) + cos(x) sin(x) = 2sinxcosx
Thus, 2sin(x/2)cos(x/2) can be rewritten in the form:
sin(2x/2), and this simplifies down to sinx.
Answer:
$2.47
Step-by-step explanation:
The cabinetmaker would have paid $13.31 for everything.
