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ki77a [65]
2 years ago
8

What is the answer of 6xy + (-9xy)

Mathematics
2 answers:
Aleksandr [31]2 years ago
8 0

Answer:

6xy + ( -9xy) = 6xy - 9xy = -3xy

kati45 [8]2 years ago
7 0

Answer:

-3xy

Step-by-step explanation:

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What is the slope of the line of (18, 28 ) (6,8)?
Finger [1]

Answer:

5/3

Step-by-step explanation:

to find the slope, we have to use the formula y2-y1 over x2-x1. Now, plug in our values; 8-28 over 6-18. Our answer becomes -20 over -12 this simplifies to 5 over 3, and there's your answer.

4 0
2 years ago
An important factor in selling a residential property is the number of times real estate, agents show a home. A sample of 21 hom
Natalka [10]

Using the t-distribution to build the 99% confidence interval, it is found that:

  • The margin of error is of 3.64.
  • The 99% confidence interval for the population mean is (19.36, 26.64).

<h3>What is a t-distribution confidence interval?</h3>

The confidence interval is:

\overline{x} \pm t\frac{s}{\sqrt{n}}

In which:

  • \overline{x} is the sample mean.
  • t is the critical value.
  • n is the sample size.
  • s is the standard deviation for the sample.

The critical value, using a t-distribution calculator, for a two-tailed 95% confidence interval, with 21 - 1 = 20 df, is t = 2.086.

The other parameters are given as follows:

\overline{x} = 23, s = 8, n = 21

The margin of error is given by:

M = t\frac{s}{\sqrt{n}} = 2.086\frac{8}{\sqrt{21}} = 3.64

Hence the bounds of the interval are:

\overline{x} - M = 23 - 3.64 = 19.36

\overline{x} + M = 23 + 3.64 = 26.64

The 99% confidence interval for the population mean is (19.36, 26.64).

More can be learned about the t-distribution at brainly.com/question/16162795

#SPJ1

7 0
1 year ago
Bob and ling are playing a number pattern game. Bob wrote the following sequence
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The unknown term is 22.6

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24.7
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6 0
3 years ago
Read 2 more answers
Length of 8 in, width of 4 in, height of 2 1/4 in,
Step2247 [10]

Answer:

72

Step-by-step explanation:

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3 years ago
What is true about the interior and exterior angle measures of any triangle
elena-s [515]
Interior angles of a triangle=180
Exterior angles = 360
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3 years ago
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