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natima [27]
3 years ago
12

The area of a rectangle is 99 square inches. What is the new area of the rectangle if the height were five times long and the ba

se decreased by one-third? Answer_square inches
Mathematics
1 answer:
garri49 [273]3 years ago
8 0

Answer:

330 square inches

Step-by-step explanation:

99 x 5 =495

495 x 2/3 =330

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Suzanne lays the books end to end and finds that the board is the same length as 21 bucks. How many centimeters long is the boar
AVprozaik [17]
357 centimeters would be your answer, this is because: 

21*17=357cm

I hope this helps. 
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Find the sum or difference.<br>81-3<br>3​
yuradex [85]

Answer:

48

Step-by-step explanation:

81 - 33 = 48

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3 years ago
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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.

H₁: μ₁ > μ₂  

To check hypothesis we have the formula

Standard error=  \sqrt{\frac{s_{1} ^{2} }{n_{1} } + \frac{s^{2} _{2} }{n_{2} }  }

= \sqrt{2067128.4706}

= 1437.7512

Thus, standard error is $1437.7512.

Formula for test statistic = [(x₁⁻ -  x₂⁻) - (μ₁ - μ₂)]/standard error

= [(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

3 0
2 years ago
Which inequality is represented by the graph?<br><br> HELP WILL NAME BRAINLIST
siniylev [52]

Answer:

y>= 2/3(x) - 2.5

Step-by-step explanation:

The sign should be "greater than or equal to" but my keyboard doesn't have that. Sorry.

The slope is "up two, over three" found by finding places where the line passes through the grid lines, and counting.

The y-intercept is -2.5. That tells you the "constant" to put in for "b" in the slope intercept form, y=mx+b

7 0
3 years ago
Please help and thx <br><br>I will mark brainlest <br><br><br>And don’t just guess <br><br>Answer #4
Effectus [21]

Answer:

4. D

Step-by-step explanation:

y=-5 is just a graph of a constant, meaning that it has a slope of 0 and does not change.

5 0
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