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bagirrra123 [75]
3 years ago
12

What is 15 to the second power

Mathematics
2 answers:
Svetradugi [14.3K]3 years ago
7 0
15*15=225
Solved, be thankful.
musickatia [10]3 years ago
6 0
15x15=225

Hope it helped!
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Answer 3*c*c*c * = multiply Make it a Simplified expression
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What is the rate of change of the function y = − 1/4 x + 1
scoray [572]

Answer:

-1/4

Step-by-step explanation:

Hello!

The rate of change is also known as the slope.

Standard equation of a line: y = mx + b

  • y: output
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  • b: y-intercept

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2 years ago
The average household income for a recent year was $30,000. five years earlier the average household income was $24,500. assume
ikadub [295]

Using hypothesis test, we conclude that there is evidence to believe that the average household income has increased.

According to the question,

The average household income for a recent year (x₁⁻) = $30,000

The average household income for a recent year (x₂⁻) = $24,500

sample sizes n₁ = n₂ = 34

standard deviation of both samples were $24,500. Thus, s₁ = s₂ = $5928.

Null hypothesis:  There is no evidence to believe that the average household income has increased.

H₀ : μ₁ ≤ μ₂

Alternative hypothesis:  There is evidence to believe that the average household income has increased.

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To check hypothesis we have the formula

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Thus, standard error is $1437.7512.

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= [(30000 -  24500) - 0]/1437.7512

= 3.8254

The critical value of z at 5% level of significance is 1.6449.

Here, the calculated value is greater than the critical value so we reject H₀.

Hence using hypothesis test, we conclude that there is evidence to believe that the average household income has increased.

Learn more about hypothesis test here

brainly.com/question/15060525

#SPJ2

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2 years ago
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ok the reason y iput uwu because uwu

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