Look at the picture.
Definitions:

We have:
and Quadrant II (x < 0, y > 0)
Therefore x=-3 and y = 2. Calculate r:

Substitute to the formula of cosine:

Answer: a.
$4,200 / .12 =$35,000 her salary this year.
$35,000 - $3,000=$32,000 Her salary last year.
An equation representing this would look something like this:
S=(C/I) - R, where, S=her salary last year, C=amount of her savings, I= rate of her savings, R=salary increase.
Take x-2=0
x=2
put the value of x in the equation
2^2 + 3(2) + k =0
4+6+k=0
10+k=0
k= -10
hope you understand
Answer:
x = 6
Step-by-step explanation:
In similar triangles, corresponding sides are in same ratio

To estimate you would do 36000-33000=3000