8x+5=29;3 can someone pls explain :)
2 answers:
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Answer:
Given equations:
- a) -3x + 3y = 9
- b) 2x - 7y = -14
<u>Make x the subject in equation 1</u>:
- -3x + 3y = 9
- -3x = 9 - 3y
- x = y - 3
<u>Substitute this into equation 2</u>:
2(y - 3) - 7y = -14
2y - 7y = -14 + 6
-5y = -8
y = -8/-5
y = 1.6
Then x = y - 3
= 1.6 - 3
= -1.4
Solution: (x, y) ⇒ (-1.4, 1.6)
Answer: 0.23
Step-by-step explanation:
Given : F is the event "works in the finishing department;"
and A is the event "is absent excessively."
Given : 10% of all plant employees work in the finishing department; 20% of all plant employees are absent excessively; and 7% of all plant employees work in the finishing department and are absent excessively.
i.e. P(A)= 0.20 ; P(F)=0.10 ; P(A ∩ F) = 0.07
We know that
Then,
Hence, the required answer is