Answer:
ugh should i drop out
Step-by-step explanation:
The 1st, 4th, and 7th terms make an arithmetic sequence of their own. The 4th term is the average of the 1st and 7th, so ...
(1st +7th)/2 = 4th
1st + 7th = 2×4th
1st = 2×4th - 7th
The first term is ...
2*141 - 132 = 150
Solution:
<u>We know that:</u>
- Perimeter of rectangle = 2L + 2B
<u>Given:</u>
<em>Substitute the values into the expression to find the perimeter.</em>
- Perimeter of rectangle = 2L + 2B
- => 2(9) + 2(5)
- => 18 + 10
- => 28 cm
