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MariettaO [177]
2 years ago
15

Solve −163 = −25d .

Mathematics
1 answer:
Schach [20]2 years ago
8 0

Answer:

the answer to this question is d

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The regular price of a soccer ball is $28 and it is on sale for 25% off. What is the sale price of the soccer ball.
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3 years ago
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Solve 2(9-x) = 3 ( x +16 )
andreyandreev [35.5K]

Answer: x=-6

Step-by-step explanation:

Let's solve your equation step-by-step.

2(9−x)=3(x+16)

Step 1: Simplify both sides of the equation by distribution

2(9-x)=3(x+16)\\(2)(9)+(2)(-x)=(3)(x)+(3)(16)\\18+-2x=3x+48\\-2x+18=3x+48\\

Step 2: Subtract 3x from both sides.

-2x+18-3x=3x+48-3x\\-5x+18=48

Step 3: Subtract 18 from both sides.

-5x+18-18=48-18\\-5x=30

Step 4: Divide both sides by -5.

\frac{-5x}{-5} =\frac{30}{-5} \\x=-6

3 0
2 years ago
Write an expression which can
Nikolay [14]

Answer:

15x^2 6y^2 5z^6

Step-by-step explanation:

area = length x width

area =  5x3y5z^2   *   3x2yz^4

5 0
2 years ago
What is the sum of the 6th square number and the 1st cube number?
Firdavs [7]

Answer:

37

Step-by-step explanation:

6th square number is 6 and 6² = 36

first cubed number is 1 and 1³ = 1

36+1=37

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2 years ago
A random sample of 28 statistics tutorials was selected from the past 5years and the percentage of students absent from each one
Vesna [10]

Using the t-distribution, the 90% confidence interval for the mean number of absences is given by: (9.22, 11.60).

<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 90% confidence interval, with 28 - 1 = 27 df, is t = 1.7033.

Researching this problem on the internet, the parameters are given by:

\overline{x} = 10.41, s = 3.71, n = 28.

Hence the bounds of the interval are given by:

  • \overline{x} - t\frac{s}{\sqrt{n}} = 10.41 - 1.7033\frac{3.71}{\sqrt{28}} = 9.22
  • \overline{x} + t\frac{s}{\sqrt{n}} = 10.41 + 1.7033\frac{3.71}{\sqrt{28}} = 11.60

The 90% confidence interval for the mean number of absences is given by: (9.22, 11.60).

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

#SPJ1

8 0
2 years ago
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