Answer:
The perimeter of the shape is (7x²+10x+81) inches.
Step-by-step explanation:
When finding the perimeter of a shape, you have to add up all the side lengths :



Answer:
In significant figure is

You can turn it into normal decimal number.
In decimal number:

Hope this will help :))
Is it a multiple choice question? I mean, 10/80?..
Answer: 7
Step-by-step explanation: Cross multiply, so 15 times x and 21 times 5. 21 times 5 is 105 then you divide by 15 which gives you 7.