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aivan3 [116]
3 years ago
5

Help ASAP please !!

Mathematics
2 answers:
timama [110]3 years ago
5 0
C. 1/2b*h 1/2(7)*7= 24.5
OlgaM077 [116]3 years ago
5 0

Answer:

24.5

Step-by-step explanation:

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Tyler's height is 57 inches. What could be his height in centimeters? Explain your resoning. Nost: 1 inch=2.54 centimeters
AfilCa [17]

Answer:

Tyler's height in centimeters is, 144.78 centimeters.

Step-by-step explanation:

Given the statement: Tyler's height is 57 inches.

To find his height in centimeters.

Using the conversion:

1 {\tex}inch = 2.54 {\tex}centimeters

Proportion states that the two ratios or fraction are equal.

Using proportion method:

\frac{1}{57} = \frac{2.54}{x}

By cross multiply, we get

x = 57 \times 2.54 = 144.78 centimeters.

therefore, his height in centimeter is, 144.78 inches.

4 0
3 years ago
The cost of 4 pretzels is $6.72. What is the cost of each pretzel?
gayaneshka [121]
Each pretzel costs $1.68
3 0
3 years ago
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Can you please help me answer questions 1-6 thank you
Veseljchak [2.6K]
3. Divide by 5
4. Add 12
5. Multiplying by -8
6.subtracting by -6
3 0
3 years ago
Read 2 more answers
Noise levels at 3 airports were measured in decibels yielding the following data:
Shalnov [3]

Answer:

a)  The 90% confidence interval for the mean noise level at such locations      

  (112.46 , 163.54)

b) The critical value that should be used in constructing the confidence interval

Z₀.₁₀ = 1.645

Step-by-step explanation:

<u><em>Step(i)</em></u> :-

Noise levels at 3 airports were measured in decibels yielding the following data

108   146   160

Mean of given data

         x^{-} = \frac{108+146+160}{3} = 138

x          :     108   146   160

x-x⁻      :      -30   8       22

(x-x⁻ )² :     900   64     484

Variance  σ ² = ∑(x-x⁻ )²/ n-1

                                        = \frac{900+64+484}{3-1}= 724

Standard deviation  

                σ = √724 = 26.90

<u><em>Step(ii):</em></u>-

The 90% confidence interval for the mean noise level at such locations                        

       (x^{-} - Z_{0.90} \frac{S.D}{\sqrt{n} } , (x^{-} + Z_{0.90} \frac{S.D}{\sqrt{n} } )

The critical value that should be used in constructing the confidence interval

Z₀.₁₀ = 1.645

         (138 - 1.645 \frac{26.90}{\sqrt{3} } , (138 + 1.645 \frac{26.90}{\sqrt{3} } )

        ( 138 - 25.54 , 138 + 25.54 )

        (112.46 , 163.54)

4 0
3 years ago
The diagram shows the straight line which passess through
tamaranim1 [39]

Step 1: Find the gradient/slope

Gradient and slope are interchangeable words. To find the gradient/slope we need to use two points that we know are on the line and the following formula: (y2 - y1) / (x2 - x1)

Point 1 = (0,1)

Point 2 = (3,13)

Gradient = (13 - 1) / (3 - 0)

Gradient = 12 / 3

Gradient = 4

Step 2: Find the y-intercept

We can use the slope-intercept form to find the y-intercept. To do so, we plug in the gradient and one of the points on the line. You can pick either point to plug in here!

Slope-intercept form: y = mx + b

-m is the gradient

-b is the y-intercept (that we are trying to find)

13 = 4(3) + b

13 = 12 + b

b = 1

Step 3: Put it all together in slope-intercept form

Now that we have the slope and y-intercept, all that's left to do is plug in the values.

y = mx + b

y = 4x + 1

Answer: y = 4x + 1

Hope this helps!!

5 0
3 years ago
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