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Delvig [45]
2 years ago
13

The most important math skill for making change is

Mathematics
1 answer:
Virty [35]2 years ago
3 0
All of them
But if u had to pick one I would say addition or subtraction
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Consider the following hypothesis test: H 0: 20 H a: < 20 A sample of 60 provided a sample mean of 19.5. The population stand
viva [34]

Answer:

We reject the null hypothesis and accept the alternate hypothesis. Thus, it be concluded that the population mean is less than 20.          

Step-by-step explanation:

We are given the following in the question:

Population mean, μ = 60

Sample mean, \bar{x} = 19.5

Sample size, n = 60

Alpha, α = 0.05

Population standard deviation, σ = 1.8

First, we design the null and the alternate hypothesis

H_{0}: \mu = 20\\H_A: \mu < 20

We use One-tailed z test to perform this hypothesis.

Formula:

z_{stat} = \displaystyle\frac{\bar{x} - \mu}{\frac{\sigma}{\sqrt{n}} }

Putting all the values, we have

z_{stat} = \displaystyle\frac{19.5 - 20}{\frac{1.8}{\sqrt{60}} } = -2.151

Now, z_{critical} \text{ at 0.05 level of significance } = -1.64

Since,  

z_{stat} < z_{critical}

We reject the null hypothesis and accept the alternate hypothesis. Thus, it be concluded that the population mean is less than 20.

5 0
3 years ago
A circle has a radius of 5. An arc of 162 degrees. What is the length of the arc?
Hunter-Best [27]

Answer:

242

Step-by-step explanation:

6 0
2 years ago
Read 2 more answers
Which expression is equivalent to 1/4 x + 3 - 1/3 x + (-2) ?
nasty-shy [4]

Answer:

The value of your expression is 7/12x +1.

Step-by-step explanation:

 1/4x + 3 - 1/3x + -2              First, positive and negative is negative

= 1/4x + 3 - 1/3x -2                 Combine like terms, 1/4x and 1/3x

= 7/12x + 3 - 2                          Combine like terms, +3 and -2

= 7/12x +1

Like terms are when a number have similar exponents bases, variables or just plain numbers.

3x, 4x, 5x

1.02x^2, 1.02x^3

<h3><u><em>Please rate this and please give brainliest. Thanks!!! </em></u></h3><h3><u><em>Appreciate it! : ) </em></u></h3><h3><u><em>And always, </em></u></h3><h3><u><em>SIMPLIFY BANANAS          : )</em></u></h3><h3><u><em></em></u></h3>

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6 0
3 years ago
Lena got a prepaid debit card with $30 on it. For her first purchase with the card, she bought some bulk ribbon at a craft store
jasenka [17]

Step-by-step explanation:

To find out how much she spent:

30 - 27.15 = 2.85

Change it to cents:

2.85 x 100 = 285 cents

Calculate how many yards of ribbon she bought:

285 / 19 = 15

Therefore, she bought 15 yard of ribbon.

6 0
1 year ago
Consider the figure below. If ΔABC is translated using the vector (x, y)→(x−3, y+3), then rotated 180° about the origin, what wi
Nostrana [21]

Answer:

-7

Step-by-step explanation:

7 0
3 years ago
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