Find the indicated nth partial sum of the arithmetic sequence.
−7, −3, 1, 5, . . ., n = 30

Step-by-step explanation:

Given the Arithmetic sequence

An arithmetic sequence has a constant difference d and is defined by

as

          ∵

    ∵  

          ∵  

Therefore, the indicated nth partial sum of the arithmetic sequence is 1530.

ANOTHER METHOD

as

n = 30

as

and

so

the expected value of the random variable : 0, 1 and 2

step-by-step explanation:

the answer for this question is : 360°

step-by-step explanation:

we have been given a triangle   we need to tell which one of these is a triangle below to map onto itself.

360° rotation is the complete rotation which eventually leads to the same figure which is given.

the correct will be, that is 360° that will cause the triangle below to map onto itself.