1. is the sequence arithmetic & common difference
2. find missing term

6.  No

7.  30.

Step-by-step explanation:

6.

Not arithmetic because there isn't a common difference . For example  211- = 7 and 42 - 21 = 21.

7.

36 - 24 = 12.

The common difference is 1/2 * 12 = 6.

So the second term =  24 + 6 = 30.

700<=560+0.08x

x is total sales $

the 560 is the constant weekly pay, since we're only calculating for one week.

we're adding 0.08x to account for the 8% of the total sales

solve it for x:

700-560 <= 0.08x

140 <= 0.08x

1750 <= x

or x >= 1750

meaning she needs $1750 worth of sales that week to earn atleast $700

as for C) just draw a number line with the number 1750 in the middle and the right shaded because it is 1750 or more.