3 years ago

Help me please someone Thankss

Mathematics

1 answer:

olganol [36]3 years ago

6 0

Answer:

Hope that helps!

Step-by-step explanation:

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Among 9 electrical components exactly one is known not to function properly. If 3 components are randomly selected, find the pro

kozerog [31]

Answer:

P=0.66

Step-by-step explanation:

We know that Among 9 electrical components, exactly one is known not to function properly. If 3 components are randomly selected.

We calculate the probability that all selected components function properly.

We calculate the number of possible combinations:

$C_3^9=\frac{9!}{3!(9-3)!}=84$

We calculate the number of favorable combinations:

$C_3^8=\frac{8!}{3!(8-3)!}=56$

Therefore the probability is:

$P=\frac{56}{84}\\\\P=0.66$

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4 years ago

What are the coordinates of the hole in the graph of the function f(x)?<br><br> f(x)=x2+3x−28x+7

Irina-Kira [14]

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Answer:

(-7, -11)

Step-by-step explanation:

$\dfrac{x^2+3x-28}{x+7}=\dfrac{(x+7)(x-4)}{x+7}=x-4\qquad x\ne-7$

The hole is at x=-7. The left- and right-limits at that point are -7-4 = -11. So, the coordinates of the hole are (-7, -11).

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