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Pachacha [2.7K]

3 years ago

8

Alex collects stamps. She has 47 stamps in all. She has 20 stamps from europe. The number of african stapes is 2 times the numbe

r of asian stamps. How many stamps from each of these 3 countries she have use reasoning to write a numerical expression .

1 answer:

ryzh [129]3 years ago

4 0

47=20+(2x+y)
Let x represent the African stamps and y represent the Asian stamps.

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2x + 3y = 3 and x + 6y = -3

jekas [21]

Answer:

Step-by-step explanation:

Multiplying x+6y=-3 with 2 so its equal to first eqn,

Eliminating,

2x + 3y = 3 (1)

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3 years ago

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solniwko [45]

Step-by-step explanation:

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3 years ago

a study timed left-handed and right-handed people to see how long it took them to hit a buzzer. the data is shown below: the six

Effectus [21]

The z or t score to be used is (0.422,0.978)

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Critical probability (p*) = 1 - (Alpha / 2), where Alpha is equal to 1 - (the confidence level / 100), is the unit statisticians use to determine the margin of error within a set of data in statistics.

The critical value for α = 0.13 is $z_{c} = \frac{z_{1} - \alpha }{2}$

The corresponding confidence interval is computed as shown below

$CI = (X1_{1} - X_{2}- z_{c} \sqrt{\frac{a_{1}^{2}}{n_{1} } + \frac{a_{2}^{2}}{n_{2} }} , X1_{1} - X_{2}+z_{c} \sqrt{\frac{a_{1}^{2}}{n_{1} } + \frac{a_{2}^{2}}{n_{2} }} )$

$CI = (2.1 - 1.4- 1.514\sqrt{\frac{1^{2}}{37 } + \frac{0.5_{2}^{2}}{38 }} , 2.1 - 1.4 + 1.514 \sqrt{\frac{1^{2}}{37 } + \frac{0.5^{2}}{38 }} )$

CI = (0.422, 0.978)

0.422< mu1 - mu 2 < 0.978

To learn more about finding the critical value from the given link

brainly.com/question/14040224

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1 year ago

An elevator ascends,or goes up,at a rate of 750 feet per minute.is the height to which the elevator ascend proportional to the n

Sliva [168]

C=480
solve

480=24n+35
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<span>so about 18 cakes</span>

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3 years ago

Charlie made the following table to record the height of each person in his family.

IRISSAK [1]

Answer:

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Step-by-step explanation:

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2 years ago

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