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svet-max [94.6K]
3 years ago
12

Solve the equation for x 1/3•x=20

Mathematics
2 answers:
Alex17521 [72]3 years ago
7 0
HSHHSHSHSHhshshhdgshd
Softa [21]3 years ago
3 0
X=60, that’s what i got on photomath
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jonny [76]

Answer:

Yes, there is evidence to support that claim that instructor 1 is more effective than instructor 2

Step-by-step explanation:

We can conduct a hypothesis test for the difference of 2 proportions.  If there is no difference in instructor quality, then the difference in proportions will be zero.  That makes the null hypothesis

H0:  p1 - p2 = 0

The question is asking whether instructor 1 is more effective, so if he is, his proportion will be larger than instructor 2, so the difference would result in a positive number.  This makes the alternate hypothesis

Ha:  p1 - p2 > 0

This is a right tailed test (the > or < sign always point to the critical region like an arrowhead)

We will use a significance level of 95% to conduct our test.  This makes the critical values for our test statistic: z > 1.645.  

If our test statistic falls in this region, we will reject the null hypothesis.

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3 years ago
Can you please expand and simplify (x+4) (x-2) ?
Komok [63]
X^2+2x-8 is the answer
8 0
3 years ago
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What is the domain and range of the function f(x)=−3/2(4)^(x−3)−1?
Mekhanik [1.2K]

Answer:

Domain: (−∞,∞)

Range: (−∞,∞)

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3 years ago
A 13.5​-m fire truck ladder is leaning against a wall. Find the distance d the ladder goes up the wall​ (above the fire​ truck)
larisa86 [58]
To solve this problem you must apply the proccedure shown below:

 1. You have the the<span> 13.5​-m fire truck ladder is leaning against a wall and the ladder makes an angle of 39 degrees 45 ' with the horizontal.

 2. Then you have:

 3</span>9 degrees 45'=39.75°
<span>
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Choose the correct classification of (3x^3 + 2x^2 - 5x)
Irina-Kira [14]

Answer:

Below.

Step-by-step explanation:

It is a polynomial of degree 3.

7 0
3 years ago
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