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ruslelena [56]
3 years ago
9

The function f is defined by f(x)=-x2+2x-7. What is the value of f(-3)?

Mathematics
1 answer:
Helen [10]3 years ago
6 0

Answer:

Option A f(-3)=-22

Step-by-step explanation:

we have

f(x)=-x^{2}+2x-7

we know that

f(-3) is the value of f(x) when the value of x is equal to -3

so

For x=-3

substitute the value of x=-3 in the equation

f(-3)=-(-3)^{2}+2(-3)-7

f(-3)=-9-6-7

f(-3)=-22

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Simplify the expression 0.032 ÷ (8 × 10^-2)
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Shkiper50 [21]

Answer:

Therefore the probability that the marble is blue or even numbered is \frac{11}{15}

Step-by-step explanation:

Probability: The ratio of favorable outcomes to the total outcomes.

It is denoted by P.

Probability= \frac{\textrm{favorable outcomes}}{\textrm{Total outcomes}}

Given that a jar contains 8 red marbles and 7 blue marbles.

Total number of marbles = (8+7) = 15

Let A = Event of getting a blue marble

B= Event of getting of even marble.

Even number blue marbles are 2, 4,6

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The number of even marbles are =(3+4)=7

The probability of getting a blue marble is P(A)

=\frac{\textrm{Total number of blue marbles}}{\textrm{Total number of blue marbles}}

=\frac{7}{15}

The probability of getting a even marble  is P(B)

=\frac{\textrm{The number of even number marbles}}{\textrm{Total number of marbles}}

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The probability of getting a even numbered blue marble P(A∩B)

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=\frac{11}{15}

Therefore the probability that the marble is blue or even numbered is \frac{11}{15}

3 0
3 years ago
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