Answer: The first one is not a function the second is a function the third one is not one and the fourth one is
Step-by-step explanation:
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.
Answer:
y = 4x + 17
Step-by-step explanation:
y = mx + b given points: (-3,5) (-5,-3)
= 
= 4
y = 4x + 17
Answer:
<h2>Multiplication.</h2>
Step-by-step explanation:
The given expression is
For 
, we have
Notice that the first operation we need to do is multiplication, because that's the right order of operations when we solve these kind of expressions.
Then, we subtract
Now, we divide
Finally, we sum
Therefore, the right answer is multiplication.
