Answer: b
Step-by-step explanation:
In the last question, you wrote on a second equation "13x ...." kkk
Let's go:
We have to check each one answer in the following system:
x - 2y = 7
3x + 7y = 8
I can use the substituition method to solve this system...
x = 7 + 2y
3x + 7y = 8
3(7 + 2y) + 7y = 8
21 + 6y + 7y = 8
13y = 8 - 21
13y = -13
y = -1
x = 7 + 2.(-1)
x = 5
Finally, the correct answer is the second one (letter b).
Find the mean of the following data: 10, 16, 15, 14, 8, 21, 10, 5, 19, 18, 4, 5, 16, 12, 10, 9
Evgesh-ka [11]
Answer:
12
Step-by-step explanation:
add all them together, then divide by the amt. of numbers there are.
The answer is (-10) - 9= -19
22h=22
So h=1
This answer is the only mistake in the equation
It will take 75 minutes because for one mile it would me 5 minutes 6/30 so 15 miles times 5 would be 75
