C = 2πr
C = 2(3.14)(0.8)
C = 2(2.512)
C = 5.024 m
The answer is C.
Answer:
<h2>
Bike A costs $270 and has an expected maintenance cost of $36 per year.</h2><h2 /><h3>
"Bike A is the better choice if Greg plans on owning the bike for 5 years. Bike B is the better choice if Greg plans on owning the bike for 6 years."</h3>
Step-by-step explanation:
270-36x
there are 5 years so x=5
270 + 36(5) = 270 + 180 = <u>450</u>
If it were 6 years than x = 6
270 + 36(6) = 270 + 216 = <u>486</u>
Bike B:
360 + 20x
For option b x = 5
360 + 20(5) = 360 + 100 = 460
for option b it would be 6 years than x = 6
360 + 20(6) = 360 + 120 = <u>480</u>
<h3>
Hope i helped!</h3>
Answer:
See below.
Step-by-step explanation:
(a) Because the solution led to a square root of a negative number:
x^2 -10x+40=0
x^2 - 10x = -40 Completing the square:
(x - 5)^2 - 25 = -40
(x - 5)^2 = -15
x = 5 +/-√(-15)
There is no real square root of -15.
(b) A solution was found by introducing the operator i which stands for the square root of -1.
So the solution is
= 5 +/- √(15) i.
These are called complex roots.
(c) Substituting in the original equation:
x^2 - 10 + 40:
((5 + √(-15)i)^2 - 10(5 + √(-15)i) + 40
= 25 + 10√(-15)i - 15 - 50 - 10√(-15)i + 40
= 25 - 15 - 50 + 40
= 0. So this checks out.
Now substitute 5 - √(-15)i
= 25 - 10√(-15)i - 15 - 50 + 10√(-15)i + 40
= 25 - 15 - 50 + 40
= 0. This checks out also.
Answer:
y=5x
Step-by-step explanation:
Because if you look at it 5x any of them would equal the answer
Answer:
129/500
Step-by-step explanation:
Decimal Fraction Percentage
0.258 129/500 25.8%
