Answer:
Addition and Subtracttion
Step-by-step explanation:
The order of operations has to with a generally accepted order to follow when evaluating a mathematical expression.
PEDMAS or BODMAS is the order of operations to follow.
The two operations that are on the same level within the order of operations are addition and subtracttion
This means that, neither has a preference over the other.
Answer:
Step-by-step explanation:
First you mean: cos2x = (cosx)^2
For A. 2(cosx)^2-1 = 1 - 2(sinx)^2
we have (cosx)^2 + (sinx)^2 = 1, This is an identity
For B. secx cscx(tanx + cotx) = sec2x + csc2x
So the B is an identity.
For C, I do not understand the ?
For D secax is what?
.625
62.5%
to find decimal divide top # by bottom # and them move decimal 2 places to the right
Step-by-step explanation:
$20/hr carpenter pay
$25/hr blacksmith pay
Let c = hours working carpentry
Let b = hours working as blacksmith
c + b = 30 {equation 1}
20c + 25b = 690 {equation 2}
In equation 1 solve for one variable in terms of the other.
c = 30-b
Substitute that into equation 2:
20(30-b) + 25b = 690
600 - 20b + 25b = 690
5b = 90
b = 90/5
b = 18 hours working as a blacksmith
c = 30-b = 30-18 = 12 hours as a carpenter
Answer:
n>6
Step-by-step explanation
add two to both sides so far its n/2>3
multiply both sides by 2
n>6