Answer:
Step-by-step explanation:
The sum of the first 10 terms of an arithmetic sequence is:
the sum of the second 10 terms is: a₁₁ + a₁₂+...+ a₂₀
And the sum of the first 20 terms of an arithmetic sequence is:
so the sum of the second 10 terms is:
Therefore we have:
and:
Answer:
<--------o o------------->
-4 2
Step-by-step explanation:
Because the sign in the inequalities is only greater than/ less than (not equal to), we know that there is an open dot on x=-4 and on x=2.
From there, we shade the area on the graph that is true to the function. So, we can test points.
First we will test x=-5
-5<-4 --> this is true, so we will shade to the left of x=-4
Now test x=0
0<-4 --> this is false
0>2 --> this is also false, so the area between the two open dots will not be shaded
Now test x=3
3>2 --> this is true, so we will shade to the right of x=3
The answer is -12. Do you need to know how I did it?
Answer:
D. (bottom right)
Step-by-step explanation:
A function is a relation where every input has an exact corresponding output.
So, a circle cannot be a function, neither can a vertical line.
If the graph in the top right contained a parabola the opened upwards instead of to the right, it could be a function. But in this case it isn't.
So, by process of elimination, it must be the bottom right graph!
