When you are given the side length and apothem of a regular polygon and asked for area, you are expected to use the formula
... A = (1/2)Pa
where P is the perimeter of the polygon, "a" is the apothem, and A is the area.
The only additional information you need is that a decagon has 10 sides, so its perimeter is 10×3.2 inches = 32 inches.
The area is ...
... A = (1/2)(32 in)(5 in)
... A = 80 in²
_____
Sometimes the dimensions of a problem like this don't quite add up. The geometry of a regular polygon means that the apothem can be found from the side length and vice versa. In this case, the side length of 3.2 inches means the apothem is about 4.92 inches; or the apothem of 5 inches means the side length is about 3.25 inches. Either way, the area is slightly different from that computed using the given numbers.
This is why I say you're expected to use the above formula. (You're not expected to think about it too much.)
The answer is D.
To find the mean you add all the numbers together and divide them by how many numbers there are.
22 + 37 + 49 + 15 + 72 = 195
195/5 = 39
Therefore, the answer is 39.
Answer:
-49 is the product of -7 and 7
Answer:
No solution
Step-by-step explanation:
Add x and 2x.
3x+9=3x+11
Move all terms containing x to the left side of the equation.
Subtract 3x from both sides of the equation.
3x+9−3x=11
Combine the opposite terms in
3x+9−3x.
Subtract 3x from 3x.
0+9=11
Add 0 and 9.
9=11
Since 9≠11, there are no solutions.
<h3>Hope it is helpful....</h3>
Answer:
Step-by-step explanation:
We have to find the value of x from the given equation.
- x²-4=0 is a quadratic equation, so it will have two values.
Step: Write the equation in simplest form.
Step: Solve the problem by spiltting method.
Step: Solve the problem with using algebraic formula.
- x² - 2² = 0
- (x - 2)(x + 2) = 0
Step : We have used a²-b² to solve the problem.
- (x - 2)(x + 2) = 0
- (x - 2)(x + 2) = 0
- (x - 2)=0 or (x + 2) = 0
- x = 2 & - 2
Therefore, the possible values of x are 2 & - 2.
