Use chain rule
d/dx ( cos2x) = sin2x*2
Take the derivative of the outside (cos(2x)) which is cos in this case.
then you take the derivative of the inside which is 2
derivative of 2x with respect to x is 2.
Answer:
x = 1
y = -2
Step-by-step explanation:
5x - 2y = 9 -----------(I)
2x + 7y = -12 --------------(II)
Multiply (I) by 7 35x - 14y = 63
Multiply (II) by 2 <u>4x + 14y = - 24</u><u> </u> {Now add and thus y will be eliminated}
39x = 39
x = 39/39
x = 1
Plugin x = 1 in equation(I)
5*1 - 2y = 9
5 -2y = 9
-2y = 9 -5
-2y = 4
y = 4/-2
y = -2
Umm I'm not sure on this but a regular probability is 1/9 so maybe taking out the 3 would leave 6/9 or in other word 2/3
Answer:
that depends
Step-by-step explanation:
how many students are in the school all together, see you would do the 3 boys over the number of people (or students) in the school
hoped this helped a little
