Answer:
Step-by-step explanation:
6cos^2(x) + 7cos(x) +2 = 0
Call cos(x) = y to change this to something a little bit more familiar.
6y^2 + 7y + 2 =0
This equation is a quadratic. Solve it first. Then we'll go back to solving for cos(x)
This equation factors into 2 possible answers
(3y + 2)(2y + 1) = 0
3y + 2 = 0
3y = - 2
y = - 2/3
2y + 1 = 0
2y = - 1
y = - 1/2
Now let's start with
cos(x) = - 1/2
That means that x is in quadrant two or three.
cos-1(1/2) = 60 degrees.
Quad 2: x = 180 - 60 = 120
Quad 3: x = 180 + 60 = 240
Now cos(x) = - 2/3
cos-1(2/3) = 48.19
Quad 2: x = 180 - 48.19 = 131.81
Quad 3: x = 180 + 48.19 = 228.19
Answer:
14/18 = 0.778
Step-by-step explanation:
14 divided by 2 = 7
18 divided by 2 = 9
7/9 is the same as 7 divided by 9
= 0.778
Answer:
just add both x and y values than put these values in formula which is given below
None of the options are correct
Step-by-step explanation:
Given :
a person has 35% chance of winning on a scratch- off lottery ticket.
To find the probability that she wins the sixth ticket is,
P( she first wins the sixth ticket )
= _ _ _ _ _ _
the first 5 dashes represent does not win values ( prob = 0.65)
the last dash represents the win ( prob = 0.35)
= (0.65) ^5 * 0.35 {assuming independence
none of the option is correct.
See attached for the synthetic division table
The numbers in the bottom row are 1, 9 and 0
The last number is the remainder. So the remainder is 0
The other values in the last row (1 and 9) form the quotient, so we have 1x+9 = x+9 as the final answer
Final Answer: C) x+9
