Answer:
30 m
Step-by-step explanation:
You simply add the lengths of all the sides. 3 m is not needed for this.
Answer:
49
Step-by-step explanation:
20+4=24 24+25=49
Answer: $388.5
Step-by-step explanation:
Total cost = cost + sales tax
Given that cost = $370
Sales tax = 5% of $370
5/100 × 370 = $18.5
Total cost = $370 + $18.5
= $388.5
I hope this is clear.
In this case you would set it up as

(180 represents the degree of the triangle)
Add up like terms

Subtract 130 to the other side (180-130)

Divide 10 to the other side ( 50/10)
.

Hope this was clear :)