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nika2105 [10]
3 years ago
10

Latasha is a waitress at Seventh Heaven Hamburgers. She wants to estimate the mean amount each group at a table leaves for a tip

. A random sample of 42 tables had a mean of = $7.30. Based on long term experience, s ≈ $2.92. Find a 90% confidence interval for the average amount left by all groups..

Mathematics
1 answer:
elena55 [62]3 years ago
3 0
Forgive me if this is wrong. I haven't done stat in a year, but comment if you need clarification!

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6. Are these triangles similar? If they are, name the postulate or theorem that proves they are.
TiliK225 [7]
C by AA- bc 180 degrees in a triangle
3 0
3 years ago
A Triangle has an angle that measures 137.3 degrees. The other two angles are in a ratio of 3:4. What are the measures of those
Andreyy89
So we start off by subtracting 137.3 from 180 getting 42.5. If you add the ratios up (3+4) you get 7 and 7 should equal 42.5. thus,

42.5/7= 85/14

(85/14)*3=18.2 or (255/14 to be exact)
(85/14)*4= 24.29 or (170/7 to be exact)
8 0
3 years ago
Find the slope of (1,8) and (-1,-4)
aniked [119]

Answer: slope= 6

Slope intercept equation= y= 6x +2

Step-by-step explanation:

Slope formula: (y2 - y1) ÷ (x2 - x1) > (-4-8) ÷ (-1-1) = -12/-2 or 6

Plug slope (-6) and one coordinate into point slope form: y-1=m (x-1)

where m is slope and (1,8) would be (x,y)

Y-8= 6(x-1) > y-8 = 5x -6 > y= 6x +2

3 0
3 years ago
Please answers quick ,whats an inequality?
dangina [55]
An inequality is a relation that makes a non-equal comparison between two numbers or other mathematical expressions. It’s mostly used to compare 2 numbers on the number line by sizes.
8 0
3 years ago
Read 2 more answers
When performing a horizontal analysis on an income​ statement, the percentage change in any individual item is calculated by div
oksian1 [2.3K]

Answer: <em><u>C. the base period amount.</u></em>

<u><em>Explanation: </em></u>While implementing a horizontal analysis on a given income statement, we compute a percentage change in any individual item by dividing the dollar amount of change from base to current  time period with <u><em>the base period amount.</em></u>

i.e. % Change in Individual item = \frac{Current\ Dollar\ - Base\ Dollar }{Base \ period \ amount}

<u><em>Therefore, the correct option in this case is (c)</em></u>

4 0
3 years ago
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