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ser-zykov [4K]
3 years ago
5

Can someone please help with this question?

Mathematics
1 answer:
allsm [11]3 years ago
8 0
What’s the question lol
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Let f(x) = x 7 and g(x) = x − 4. find f(x) ⋅ g(x).
nikklg [1K]
F(x) = x⁷

g(x) = x - 4

f(x).g(x) = <span>x⁷*(x - 4) = x</span>⁸ - 4x⁷
4 0
3 years ago
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The Office of Student Services at a large western state university maintains information on the study habits of its full-time st
ExtremeBDS [4]

There is a probability of 77% that the mean of this sample is between 19.25 hours and 21.0 hours

Z score is used to determine by how many standard deviations the raw score is above or below the mean. The z score is given by:

z=\frac{x-\mu}{\sigma/\sqrt{n} } \\\\where\ x=raw\ score,\mu=mean,\sigma=standard\ deviation,n=sample\ size

Given that μ = 20, σ = 7, n = 125.

For x = 19.25:

z=\frac{19.25-20}{7/\sqrt{125} } =-1.20\\\\\\For\ x=21:\\\\z=\frac{21-20}{7/\sqrt{125} } =0.62

From the normal distribution table, P(-1.20 < z < 0.62) = P(z < 0.62) - P(z < -1.2) = 0.8849 - 0.1151 = 0.7698 = 77%

There is a probability of 77% that the mean of this sample is between 19.25 hours and 21.0 hours

Find out more on z score at: brainly.com/question/25638875

8 0
2 years ago
What is 67 sec and 76 minuts equal to
Readme [11.4K]

Answer:

1 hour and 17 minutes and 7 sec

Step-by-step explanation:

.

6 0
3 years ago
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Elise built a rectangular vegetable garden that is 9 feet long and has an area of 72 square feet.
irga5000 [103]
The answer is 34 you would divide 9 from 72 and get 8 then 8*2 plus 9*2
5 0
3 years ago
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POSSIBLE POINTS: 3.33
Triss [41]

Answer:

From the information given, you can write the following system of equations:

x+y+z=16 (1)

5x+4.5y+5.5z=82 (2)

z=x+y (3)

You can replace (3) in (1) and (2):

x+y+x+y=16

2x+2y=16 (4)

5x+4.5y+5.5(x+y)=82

5x+4.5y+5.5x+5.5y=82

10.5x+10y=82 (5)

Now, you have the following equations:

2x+2y=16 (4)

10.5x+10y=82 (5)

You can isolate x in (4):

2x=16-2y

x=8-y (6)

Then, you have to replace (6) in (5):

10.5(8-y)+10y=82

84-10.5y+10y=82

84-82=10.5y-10y

2=0.5y

y=2/0.5

y=4

Now, you can replace the value of y in (6) to find x:

x=8-4

x=4

Finally, you can replace the vaue of x and y in (3) to find z:

z=4+4

z=8

According to this, she should buy 4 apple pies, 4 banana pies and 8 chocolate pies.

3 0
3 years ago
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