Answer:

Step-by-step explanation:
I assume that you need simplification of the given expression.
The given expression is:

Using distributive property and multiplying 2 inside the parenthesis and 1 inside the other parenthesis. This gives,

Therefore,
is equal to:

Now, combining like terms using the commutative property of addition, we get:

Therefore, the simplified form is 
Answer:
Step-by-step explanation:
a) 310cos25 = 281 N
b) (620 - 281) / cos-18 = 356 N
Answer:
15% 30% 50% 75% 89%
Step-by-step explanation:
u change 0.15 to a function 15/100 then the one hungred below is persent
Step-by-step explanation:
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Answer:
3
Step-by-step explanation: