Answer:
The mean of the combined group is 76.67 ≈ 77
Step-by-step explanation:
- The sum of the grades in Tom's group is 20×70 = 1400
- The sum of grades in Alice's group is 10×90=900
- The sum of gradees in the combined group is =1400+900=2300
- Then the mean grade of the combined group is

where
- 2300 is the sum of the all grades in the combined group
- 30 is the total number of people in the group
Let
x---------> the thickness of the frame in feet
At-------> Area of the mirror and the frame in square feet
we know that
------> equation 
--------> equation 
equate equation
and equation 

therefore
the answer is the option

Answer:
you didnt attach the picture or assignment
Answer:
The answer to your question is:
Step-by-step explanation:
Convert 50°F to Celsius
Formula
°C = (°F - 32) x 0.56
Process
°C = (50 - 32) x 0.56
°C = 18 x 0.56
°C = 10.08
So it our equation would be t(5)=5^2+2(5)
25+10=35 :)