When solving a system by substitution one should
1 answer:
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Delete as this is the wrong answer. Made a typo in the answer.
Answer:
x =
y = 24
Step-by-step explanation:
-3x - 8y = 20 .... (1)
-5x + y = 19 .... (2)
What we can do is take the (2) equation
-5x + y = 19
and solve for y by adding 5x to both sides
y = 24
now that we have y we substitute it in for y in equation (1)
-3x - 8(24) = 20
-3x - 192 = 20
we want to solve for x so we need to get its self.
add 192 to both sides
-3x = 212
now we divide both sides by -3. It's going to be a fraction.
x =
Answer:
Step-by-step explanation:
Given
--- selection
Required
Probability of choosing a pair with only B, C and F
The total selection is: 36
This is calculated as thus:
--- First selection can be any of the 6 cards
--- Second selection can be any of the 6 cards [No restriction]
So, we have:
The pair of only B, C or F is:
So, the probability is:
Simplify