Answer:
B
Step-by-step explanation:
Hello!
You have to find what a and b are
3a + 4a = 14
b + 6b = 21
Lets do a first
3a + 4a = 14
Combine like terms
7a = 14
Divide both sides by 7
a = 2
Now lets do b
b + 6b = 21
Combine like terms
7b = 21
Divide both sides by 7
b = 3
Put a and b into the third equation
7( 2 + 3) =
Do what is in parenthesis first
7(5) =
Multiply
35
The answer is 35
Hope this helps!
The answer is D because you add all the data points values and divide by how many points you have. So in this situation when you add the data you get 135 and divide by the amount of data points you have which is 15. So you get 9
Answer:
Original value: 5.69
Value (with 10 decimal places): 5.69
