Answer:
Solution : Option C
Step-by-step explanation:
We have the equations r² = x² + y², x = r cos(θ), and y = r sin(θ) that can be used to solve this problem. In this case we only need the second two equations ( x = r cos(θ), and y = r sin(θ) ) as we don't need to apply the concept of circles etc here.
Given : x = - 9,
( Substitute r cos(θ) for x )
r cos(θ) = - 9,
r = - 9 / cos(θ)
( Remember that sec is the reciprocal of cos(θ). Substitute sec for 1 / cos(θ) )
r = - 9 sec(θ)
Therefore the third option is the correct solution.
In step 2 the 6(1 * x) is supposed to be 6 * 6x.
1) $2
2) 29
3) 8
4) $20
5) $12
6) 4
7) $8 8) 5
Answer: 4
Step-by-step explanation:
=(
−2
/3)(
−1
/6)
=(
−2
/3
)(
6
/−1
)
=
(−2)(6)/
(3)(−1)
=
−12
/−3
=4
