An for arithmetic sequence, an = a + (n - 1)d
a8 = a + (8 - 1) x 5 = a + 7 x 5 = a + 35 = 56
a = 56 - 35 = 21
Therefore, an = 21 + (n - 1) x 5 = 21 + 5n - 5 = 16 + 5n
an = 16 + 5n
Use the area of rectangle formula which is:

Given that:
- area of rectangle = 16
- width = 8
- length = x-5
Substitute in the formula:

Distribute 8 in the expression:

Move -40 to another side and change from -40 to 40.

Then move 8 to divide 56, leaving only x.

Hence, the answer is:

Answer:
-25
Step-by-step explanation:
Answer:
-9.5-42.1/6=x
-8.6
-9.5+ 6x-8.5
-61.1
Step-by-step explanation:
Matilda only ate 1/12 of the pie as 1/2 of 1/6 = 1/12