genyjoannerubiera
06.12.2019 •
Mathematics
Use the elimination method to solve the system of equations. choose the correct ordered pair.
4x + 7y = 60
-4x + 7y = -4
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Ответ:
-4x + 7y = -4
add
14y = 56
y = 56/14
y = 4
4x + 7y = 60
4x + 7(4) = 60
4x + 28 = 60
4x = 60 - 28
4x = 32
x = 32/4
x = 8
so ur solution is : (8,4)
Ответ:
Step-by-step:
The first flip numbers will always add up to 1 so you do
1 - 2/7= 5/7
now it gets easy...
The second flip head will be 2/7 because it is a biased dice and the second flip tail will be 5/7
This also applies for the bottom 2: 2/7 head, 5/7 tails
hope this helped :)