<u>Answer:</u>
$50 and $115
<u>Step-by-step explanation:</u>
We know that,
the sum of the two rates = $165 per hour
Let x and (165 - x) represent the $/hour of the 15hr and 5hr mechanics respectively.
Then combining their charges together to get:
Solving for x to get:
So the rate charged per hour by one mechanic is $50 and for the other mechanic = 
$115.
14 my teacher just told me the answer
Answer:
BC= 2√5
CD= 2√10
DE= 2√5
BE= 2√10
slope of BC = 2
slope of CD = 1/3
slope of DE = 2
slope of BE = 1/3
Step-by-step explanation:
formula for distance = √(x2-x1)²+(y2-y1)²
formula for slope = (y2-y1)/(x2-x1)
Answer: 
Step-by-step explanation:
Given : Sample size : n=69
Sample mean : 
Standard deviation : 
Significance level : 
Then , Critical value : 
The formula to confidence interval is given by : -
Hence, the 95% confidence interval for the number of chocolate chips per cookie for big chip cookies=
Answer:
a.2:3 or 2 to 3
Explanation:
Convert the hour to 60 minutes then divide them both by 20 to get your answer.
b.If we divide 4.5 km by 0.5 km we get 9, so the distance on the map must be 9 cm. working out what 1 cm on the map is equivalent to as a real life distance. A map has a scale of 1:25000. This means that 1 cm on the map is 25000 cm in real life, which is 250 m or 0.25 km.
Step-by-step explanation:
