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2 years ago

19. Tracey stopped at the convenience store on her way to school. With tax, bottles of soda

Mathematics

1 answer:

ki77a [65]2 years ago

6 0

Answer:

she could buy 3 bags of chips with money left over

Step-by-step explanation:

19. 12 - 3 (2 bottles soda) = 9 - (3)(2.50 bags of chips)= 9 - 7.50 =1.50

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At the peak of a roller coaster ride, the rider's watch flew off his wrist. The height h in feet of the watch, t seconds after h

defon

Answer:

$3 \: s$

Step-by-step explanation:

$y = - 16 {x}^{2} + 32x + 48 \\ 0 = \frac{ - 16 {x}^{2} + 32x + 48 }{ - 16} \\0 = {x}^{2} - 2x - 3 \\ 0= {x}^{2} - 3x + x - 3 \\ 0= x(x - 3) + 1(x - 3) \\0 = (x + 1)(x - 3) \\ \\ x + 1 = 0 \\ x = - 1 \\ x - 3 = 0 \\ x = 3$

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3 years ago

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Which statement best describes the function below? \f(x)=2x^2-3x+1

goldfiish [28.3K]

Answer:

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2 years ago

How many times does 25 go into 63

statuscvo [17]

Answer:

2 times

Step-by-step explanation:

25 x 2 is 50. And 25 x 3 is 75, and 75 is larger then 63.

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2 years ago

BRAINLIEST+STARS

Evgen [1.6K]

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2 years ago

A researcher obtained M = 27 for a sample of n = 36 scores selected from a population with µ = 30 and σ = 18. This sample mean c

dusya [7]

Answer:

True

Step-by-step explanation:

Given that:

M = 27, sample of n = 36 scores, µ = 30 and σ = 18.

The z score is used in statistics to determine by how many standard deviations the raw score is above or below the mean. If the z score is positive, the raw score is greater than the mean and if the z score is negative the raw score is less than the mean. The z score is given as:

$z=\frac{x-\mu}{\sigma}$

Given that M = 27, this means that x = 27. Therefore:

$z=\frac{x-\mu}{\sigma}\\\\for \ a\ sample\ size(n):z=\frac{x-\mu}{\sigma/\sqrt{n} }\\\\z=\frac{27-30}{18/\sqrt{36} } =\frac{-3}{3}=-1$

This sample mean corresponds to a z-score of z = –1.00.

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3 years ago