The area of the regular octagon is calculated as half of the product of the perimeter and the apothem (ap), using the formula of the area of the regular polygon.
We have then:
A = ((p) * (ap)) / 2
Where,
p: perimeter
ap: apotema
Substituting values:
A = ((8 * 3.4) * (4.2)) / 2
A = 57.12 in ^ 2
Answer:
the area of the regular octagon is:
B. 57
Answer:
The x-value is between –1 and –2, and the y-value is between 3 and 4
Step-by-step explanation:
we have
y=-2x+1 ----> equation A
y=x+5 ----> equation B
Solve the system of equations by elimination
Multiply the equation B by 2 both sides
2y=2x+10 ----> equation C
Adds equation A and equation C
y=-2x+1
2y=2x+10
---------------
y+2y=1+10
3y=11
y=11/3
Find the value of x
y=x+5
11/3=x+5
x=(11/3)-5
x=-4/3
therefore
x=-1.33, y=3.67
The x-value is between –1 and –2, and the y-value is between 3 and 4
$15.99x2 +2.99+3.99= subtotal
subtotal x .089= Tax due
tax due + subtotal = total spent
38.96*.089= 3.46
3.46 +38.96= 42.42744
so altogether with tax, Joseph and Tyler spent $42.43 at the hobby store
The correct answer is 4(1.75)x :)