Answer:
C. 8
the answer is eight or C whatever
Answer:
The answer to your question is 5 weeks
Step-by-step explanation:
Data
Ryan Miles
$150 $50
each week = $40 each week = $60
x = savings
y = time in weeks
Process
1.- Write an equation for Ryan savings
x = 40y + 150
2.- Write an equation for Miles savings
x = 60y + 50
3.- Solve the system by Equality
40y + 150 = 60y + 50
- Solve for y
40y - 60y = 50 - 150
-20y = -100
y = -100 / -20
y = 5
4.- Conclusion
After 5 weeks, they will have the same amount of money.
Answer: 54.88 mph
Step-by-step explanation: the Doppler effect formulae is given below as
f' = (v + vo) /(v - vs) × f
Where f' = observed frequency = 236 Hz,
f = frequency of sound source (stationary frequency) = 253 Hz.
v = speed of sound in air = 761 mph
Since the car (source) is moving away relative to the observer, vs will have a negative value (-vs)
vo = 0 mph ( since the observer is not moving)
By substituting the parameters, we have that
236 = (761+0)/(761 - (-vs)) × 253
236 = (761/ 761 +vs) × 253
By cross multiplication, we have that
236 × (761 +vs) = 761 ×253
761 + vs = 761 ×253/ 236
761 + vs = 192533/ 236
761 + vs = 815.88
vs = 815.88 - 761
vs = 54.88 mph
4b - 24 + 19 = 4b - (-24 + 19) = 4b - 5
Answer:
The measure of an interior angle of a regular 15-gon is 120°.
Step-by-step explanation:
We need to determine the measure of the size of an interior angle of a regular 15-gon having 15 sides.
Thus,
The number of sides n = 15
Hence,
Using the formula to determine the measure of an interior angle of a regular 15-gon is given by
(n - 2) × 180° = n × interior angle
substitute n = 15
(15 - 2) × 180 = 15 × interior angle
13 × 180 = 15 × interior angle
Interior angle = (10 × 180) / 15
= 1800 / 15
= 120°
Therefore, the measure of an interior angle of a regular 15-gon is 120°.
