Answer:

Step-by-step explanation:
Solve

For x=-1/2 and y=-3
substitute the value of x and the value of y in the expression above

Remember that

so

Convert to mixed number

Please insert a image but i think the answer would be C or B
Answer:
- 3
Step-by-step explanation:
Note that - (-) = +
Given
- 7 - (- 4)
= - 7 + 4
= - 3
Answer:
radius= 4.5
Step-by-step explanation:
to find the radius of a circle given circumference you have to use the formula:
r=C/2π
divide: 28.27 / 2π
this equals
4.5
your welcome!
I think you mean "a set of three points". What I would do is take one point, find the slope from that point to another one, and then find the slope from the same starting point to the third one. If the (absolute values of the) slopes from the same starting point to each of the others are equal, then the three points are collinear.