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3 years ago

-12 is equal to a number subtracted from 3

2 answers:

7 0

So lets break this up for you.

-12 is equal to (-12=) a number (x) subtracted from 3 (-)(3)

so the the complete answer is :

-12=x-3

tamaranim1 [39]3 years ago

3 0

3 - 15 = -12
so that is your answer

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A professor wishes to discover if seniors skip more classes than freshmen. Suppose he knows that freshmen skip 2% of their class

KIM [24]

Answer:

We conclude that seniors skip more than 2% of their classes at 0.01 level of significance.

Step-by-step explanation:

We are given that a professor wishes to discover if seniors skip more classes than freshmen. Suppose he knows that freshmen skip 2% of their classes.

He randomly samples a group of seniors and out of 2521 classes, the group skipped 77.

Let p = percentage of seniors who skip their classes.

So, Null Hypothesis, $H_0$ : p $\leq$ 2% {means that seniors skip less than or equal to 2% of their classes}

Alternate Hypothesis, $H_A$ : p > 2% {means that seniors skip more than 2% of their classes}

The test statistics that will be used here is One-sample z proportion statistics;

T.S. = $\frac{\hat p-p}{{\sqrt{\frac{\hat p(1-\hat p)}{n} } } } }$ ~ N(0,1)

where, $\hat p$ = sample proportion of seniors who skipped their classes = $\frac{77}{2521}$

n = sample of classes = 2521

So, test statistics = $\frac{\frac{77}{2521} -0.02}{{\sqrt{\frac{\frac{77}{2521}(1-\frac{77}{2521})}{2521} } } } }$

= 3.08

The value of the test statistics is 3.08.

Now at 0.01 significance level, the z table gives critical value of 2.3263 for right-tailed test. Since our test statistics is more than the critical value of z as 2.3263 < 3.08, so we have sufficient evidence to reject our null hypothesis as it will fall in the rejection region due to which we reject our null hypothesis.

Therefore, we conclude that seniors skip more than 2% of their classes.

6 0

3 years ago

To make green paint, students mixed yellow paint with blue paint. The table below shows how many yellow and blue drops from a dr

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Answer:

Step-by-step explanation: i drew it with marker on the photo

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2 years ago

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a coin is tossed 3 times. what is the probability of getting heads on the first toss, heads on the second toss, and tails on the

Salsk061 [2.6K]

Answer:

There are 2^3 = 8 possible outcomes after tossing a fair coin fairly 3 times. The 8 possible outcomes are: TTT, HTT, THT, TTH, HHT, HTH, THH, HHH. Exactly 2 of 8 possible outcomes result in 3 of the same faces showing up.

Step-by-step explanation:

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2 years ago

K + 4(5k +6) = - 123 HELP ASAP

Anni [7]

Answer:

-7

Step-by-step explanation:

-123-(6x4=24)=-147 -147 divided by (4x5k+1k=21k)=-7

4 0

2 years ago

Help me fill this out! please be honest and help me , i'll mark you brainlesst

faust18 [17]

Answer/Step-by-step explanation:

1. The vertex of am angle is formed when two lines join together. The vertex of the angle shown in the diagram is located outside the circle.(<R)

2. The lines that created <FRT (lines FR & TR) are secants

3. The major arc = FT = 140°

minor arc = QS = 44°

4. Formula of Exterior angles of a circle = (major arc - minor arc)/2

x = (140 - 44)/2

x = 96/2

x = 48°

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2 years ago