The answer is D. The grand total for 12th graders is 68. Divide the 28 students in 12th grade who prefer math by the grand total to get you a rounded answer of 0.412.

4 0

4 years ago

Write an equation for the nth term of the arithmetic sequence. Then find a 30

AnnZ [28]

Answer:

The nth term is given by: $a_n = -9 + 3(n-1)$

The 30th term is 78.

Step-by-step explanation:

Arithmetic sequence:

The nth term of an arithmetic sequence is given by:

$a_n = a_1 + (n-1)d$

In which $a_1$ is the first term and d is the common difference between terms.

-9, -6, - 3,0

This means that $a_1 = -9, r = -6 - (-9) = -6 + 9 = 3$ . So

$a_n = -9 + 3(n-1)$

30th term:

$a_30 = -9 + 3(30-1) = -9 + 87 = 78$

The 30th term is 78.

6 0

3 years ago

Five friends are going bowling two of the rent shoes at three dollars per pair the group spent $15 at the snack bar the total co

Vedmedyk [2.9K]

66-(3*2)
60/5= 11
so 11$ for the three who didn't rent shoes and the two who did spent 14 each

8 0

3 years ago

Which pairs of polygons are congruent?​

Which pairs of polygons are congruent?