Make D the subject of formula
A=cd-b

Step-by-step explanation:

We basically have to isolate D by itself, so that involves some addition and division to do so.

Our current equation is:  

So first we move to the other side via addition.

Then we move to the other side by dividing both sides by it in order to cancel it on the right side.

arithmetic sequence

step-by-step explanation:

given that a sequence has terms as

19, 15, 11,

this is represented on a graph

the pattern indicates that the sequence is an arithmetic sequence with i term

a=19 and common difference d =-4

any general term

thus the sequence is reduced by 4 for each successive term starting from 1 and nth term is

24-5n.

first negative term would start after 5th term

5th term =24-25< 0

from 5th term onwards the sequence would be negative.

3

step-by-step explanation:

divide 13.5 by 9 to get the scale factor. it equals 1.5

2 * 1.5 = 3