Answer:
40
Step-by-step explanation:
look at the picure for step by step explanation
Step-by-step explanation:
1) let number=a
six times a number=6a
Condition:
6a+4=22
2) eleven times a number=11a
Condition:
11a-5=50
3) 9 times a number=9a
Condition:
9a-7=-16
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The 8 sides of the regular octagon are all the same length, so the perimeter of it is 8*(12.4 in) = 99.2 in.
The area of a regular polygon is half the product of the perimeter and the apothem.
area = (1/2)(99.2 in)(15 in) = 744 in²
The area of the stop sign is 744 in².
- 4 = 16
= 20 <em>added 4 to both sides</em>
3x = 40 <em>multiplied both sides by 2</em>
x = <em>divided both sides by 3</em>
Answer: x =
a² - b² = (a - b)(a + b)
49x² - 9 = (7x)² - 3² = (7x - 3)(7x + 3)