3 years ago

Three cards are chosen from a deck of 52 playing cards whit replacement. what is the probability every card will be a hearth?

1 answer:

7 0

You have 13 cards that are hearts and a deck of 52. So you do

13/52(fraction) x 13/52 (fraction) x 13/52(fraction) = 1/64 simplified answer

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Your answer would be C.

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2 years ago

If f(x) is discontinuous, determine the reason. f(x)= {x^2 +4, x<=1; x+3, x>1}

tester [92]

Answer:

Observe that f(x) is a continuous function when $x1$ because is a polynomial. The possible problem may occur in x=1.

Then, f(x) is discontinuous in x=1 if the limits of f to the right and the left of 1 exist and are different or if some of those limits doesn't exist.

Let's calculate the limits:

$lim_{x\rightarrow 1^+}f(x)=lim_{x\rightarrow 1}(x+3)=1+3=4$

$lim_{x\rightarrow 1^-}f(x)=lim_{x\rightarrow 1^-}(x^2+4)=1^2+4=5$

Since, $lim_{x\rightarrow 1^-}\neq lim_{x\rightarrow 1^+}$ then f(x) is discontinuous in x=1.

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3 years ago

N(n+1)+3=45 what number n makes?

torisob [31]

Answer:

The answer is 20.5

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2 years ago

What is the discriminant D of the equation? a2−2a+5=0 Enter your answer in the box.

xxMikexx [17]

For a quadratic equation ax^2 + bx + c = 0, the discriminant is given by b^2 - 4ac
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3 years ago

Read 2 more answers

Convert each rate. round to the nearest tenth if necessary. Show ALL work. <br>10 ounces= grams

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283.495

Step-by-step explanation:

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