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tester [92]
3 years ago
7

PLEASE HELP! 30 POINTS!

Mathematics
2 answers:
Alexandra [31]3 years ago
8 0

The vertex for f(x)=(x+1)^2-2 would represent a minimum because the coefficient of the binomial (x+1) squared term is positive (understood to be in front of the parenthesis). Think about the Vertex From: y=a(x-h)^2+k where "a" is the coefficient of the binomial and(h, k) is the vertex. If "a" is positive the parabola opens up U (Making the vertex the lowest point of the graph). If "a" is negative the parabola opens down N (making the vertex the highest point of the graph)

Therefore:

The vertex of f(x) is a minimum because a=1.

The vertex of g(x) is a maximum because a=-1.

BartSMP [9]3 years ago
3 0

These equations are already in vertex form. So, we can easily find the vertex of each equation.

f(x) = -(x-1)^2 - 2

Vertex: (1,-2)

The vertex in this equation is the maximum because it faces down (a=-1).

g(x) = (x+2)^2 + 1

Vertex: (-2,1)

The vertex in this equation is the minimum because it faces up (a=1).

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Suppose the time it takes a barber to complete a haircuts is uniformly distributed between 8 and 22 minutes, inclusive. Let X =
salantis [7]

Answer:

P(X>14)= 1-P(X

And replacing we got:

P(X>14)= 1- \frac{14-8}{22-8}= 0.5714

The probability that a randomly selected barber needs at least 14 minutes to complete the haircut is 0.5714

Step-by-step explanation:

We define the random variable of interest as x " time it takes a barber to complete a haircuts" and we know that the distribution for X is given by:

X \sim Unif (a= 8, b=22)

And for this case we want to find the following probability:

P(X>14)

We can find this probability using the complement rule and the cumulative distribution function given by:

P(X

Using this formula we got:

P(X>14)= 1-P(X

And replacing we got:

P(X>14)= 1- \frac{14-8}{22-8}= 0.5714

The probability that a randomly selected barber needs at least 14 minutes to complete the haircut is 0.5714

6 0
3 years ago
Jenny bought a wok for £9.60 in a 20% off sale. What was the price of the<br> wok before the sale?
emmasim [6.3K]

Answer:

£12

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9.60 = 80% times y.

9.60 = 0.8y

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4 0
4 years ago
NEED HELP ASAP!!!!!!
avanturin [10]

commitative property and

distributive property

5 0
3 years ago
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Find the mean,median, mode, and range. 10,8,12,6,5,4,10. This is what I got: Mode:10 Median:8 Mean: 7.9 Range: 8 However, none o
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You are doing everything correct. hope that helped
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x=5
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