2x + 3y = 9
x + 5y = 8....multiply by -2
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2x + 3y = 9
-2x - 10y = -16 (result of multiplying by -2)
---------------add
-7y = - 7
y = -7/-7
y = 1
x + 5y = 8
x + 5(1) = 8
x + 5 = 8
x = 8 - 5
x = 3
solution is (3,1)
Answer:
0.18
Step-by-step explanation:
Find the probability that both independent events occur by multiplying the individual probabilities by each other:
0.2(0.9)
= 0.18
So, the probability is 0.18
Answer: He bought 7 pens.
Step-by-step explanation:
21/3 = 7
From what I see B. is 20 but for C I can't see the complete question
Answer: try cross multyplying. It really helps
Step-by-step explanation: