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ella [17]
3 years ago
9

The average attendance at a local high school this year was 950 students. Each year the attendance decreases at a rate of 5% per

year. What will the average attendance be in three years?
Mathematics
1 answer:
o-na [289]3 years ago
5 0

Answer:

Number of students= 820.64 = 821

Step-by-step explanation:

Giving the following information:

Current attendance= 950 students

Number of periods= 3 years

Decrease rate= 5%

<u>To calculate the number of students in attendance in 3 years, we need to use the following formula:</u>

Number of students= current attendance*(1+decrease rate)^(-n)

Number of students= 950*(1.05^-3)

Number of students= 820.64 = 821

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Answer:

B.

Step-by-step explanation:

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3 years ago
Tina is saving to buy a notebook computer. She has two options. The first option is to put $500 away initially and save $30 ever
Jlenok [28]
First option:
y=money saved
x=number of months

y=30x+500

Second option:

y=50x+200

We have this system of equations:

y=30x+500
y=50x+200

We can solve this system of equations by equalization method
30x+500=50x+200
30x-50x=200-500
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so;
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Answer; after 15 months, she would save the same amount using either option, the amount saved in either option will be $950. 
3 0
3 years ago
What kind of sequence is this? 143, 125, 107, 89, ...
podryga [215]

Hello from MrBillDoesMath!

Answer:   It is part of an arithmetic progression

Discussion:

143 - 125 = 18

125 - 107 = 18

107 - 89  = 18


The value 18 is subtracted from each term in the arithmetic sequence.

Regards, MrB

4 0
3 years ago
Casey has 8 1 2 yards of fabric. She uses 2 1 2 yards to make pillows and 3 yards to make curtains. How much fabric is remaining
ra1l [238]

Let

x-------> yards of fabric used to make pillows

y-------> yards of fabric used to make curtains

T------> total yards of fabric

R-------> remaining yards of fabric

we know that

R=T-(x+y)

we have

T=8\frac{1}{2}\ yards\\\\ x= 2\frac{1}{2}\ yards\\ \\y=3\ yards

substitute in the formula above

R=8\frac{1}{2}-(2\frac{1}{2}+3)

R=8\frac{1}{2}-(5\frac{1}{2})

R=3\ yards

therefore

<u>the answer is</u>

the remaining of fabric is 3\ yards


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3 years ago
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A straight angle is 180 degrees in a right angle is 90 degrees
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