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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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The product of 7 and a number, increased by 3, is equal to twice the number, subtracted from 39. Find the number.
musickatia [10]
It's just an equation, the number you're looking for is X, and then turn the words into an solvable equation with respect to X.

7X + 3 = 39 - 2X
9X = 39 -3 = 36
X = 4
8 0
2 years ago
yler and Bethany have 240 feet of fencing with which to build a garden. Tyler wants the garden to be in the shape of a square, w
Sidana [21]
To get which design would have maximum area we need to evaluate the area for Tyler's design. Given that the design is square, let the length= xft,  width=(120-x)
thus:
area will be:
P(x)=x(120-x)
P(x)=120x-x²
For maximum area P'(x)=0
P'(x)=120-2x=0
thus
x=60 ft
thus for maximum area x=60 ft
thus the area will be:
Area=60×60=3600 ft²
Thus we conclude that Tyler's design is the largest. Thus:
 the answer is:
<span>Tyler’s design would give the larger garden because the area would be 3,600 ft2. </span>
4 0
2 years ago
Randy began completing the table below to represent a particular linear function. Write an equation to represent the
Mkey [24]
Officials say the hospital was gonna a long day
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2 years ago
The experimental probability of rain in a certain town is 20 percent. In the next 45 days, how many days can one expect it to ra
Hatshy [7]

9.

hope this helps :)

8 0
2 years ago
Sara has $1.30 less than double what Billy does. Sara has $53.72. How much money does Billy have?​
lilavasa [31]

Answer:

Billy has $27.51

Step-by-step explanation:

First let's set up an equation to solve this problem.

Assign a variable to Billy's amount. Let's make it x.

Then we just interpret the problem and solve:

2x - 1.30 = 53.72

     +1.30    +1.30

----------------------------

2x = 55.02

(Divide by 2 on both sides)

----------------------------

x = $27.51

2x = Billy's amount doubled

2x - 1.30 = Taking away 1.30 from double Billy's amount

53.72 = Sara's amount

6 0
3 years ago
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