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mestny [16]
3 years ago
15

The quadratic function f(x)=-5x^2+5 does the parabola open up or down

Mathematics
1 answer:
yulyashka [42]3 years ago
5 0
It opens down.
Since the beginning number -5x^2 is negative, it will open down.
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1. In school lottery to win a price for "Free Domino's Pizza" it is required to select 5 numbers (in any order) out of 40 number
barxatty [35]

Answer:

1/8 ;

12 / 51

Step-by-step explanation:

To select any 5 numbers out of 40

Number of selection required / total numbers

Probability of winning = 5 /40 = 1/8

Total number of socks = 18

White, W = 8

Black, B = 6

Blue, C = 4

probability, without looking in the drawer, that you will first select and remove a black pair, then select either a blue or a white pair?

P(B) * [(P(C) + P(W)]

Probability = required outcome / Total possible outcomes

P(B) = 6 / 18 = 1/3

Without replacement :

P(W or C) = 8/17 + 4/17 = 12/17

Hence,

1/3 * 12/17

= 12 / 51

8 0
3 years ago
Find the mean of the data
pogonyaev

108+103+98+105+85+112+119+82+94+115+126+89 = 1236

1236÷12 =103

4 0
3 years ago
Read 2 more answers
In a game of luck, a turn consists of a player rolling 7 six-sided dice and counting how many of the dice
harkovskaia [24]

Answer: Binomial

Step-by-step explanation:

1 / 3

A binomial setting has a set number of trials, and the variable in question is the number of

successes that occur in those trials.

A geometric setting does not have a set number of trials, and the variable in question is the

number of trials it takes to get the first success.

In both settings, the trials are independent and the probability of success remains the same on

each trial.

2/3

In this game, the player rolls 7 dice, and F is the number of dice that show a 5. So the variable is

counting the number of successes

The rolls are independent, and the probability of getting a 5 is the same on each roll,

3/3

F is a binomial variable

4 0
2 years ago
The federal government spends $25.2 million each year to operate parks and historic sites in Washington D.C. This is $7.8 millio
Ray Of Light [21]

Answer:

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Step-by-step explanation:

y + 7.8 = 25.2

(now we solve the equation .... we substract 7.8 from each side of the equation )

y = 25.2 - 7.8

y = 17.4

5 0
3 years ago
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ludmilkaskok [199]

Answer:

  • k = 1.6
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Step-by-step explanation:

If the variation is proportional dividing the y-value by the x-value will give the same result for all table entries. That quotient is the constant of variation (k).

Here 6.4/4 = 11.2/7 = 16/10 = 20.8/13 = 1.6

The value of y varies directly as x, and the constant of variation is 1.6. The equation is ...

  y = 1.6x

8 0
3 years ago
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