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svetlana [45]
3 years ago
12

On fan appreciation day

Mathematics
1 answer:
vazorg [7]3 years ago
4 0

It is on Sunday,September 23 @1:10 P.M .

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Solve the quadratic equation below<br><br> x2-64=0
Montano1993 [528]

Answer:

x=32

Step-by-step explanation:

first, you add 64 to both sides and you have:    x2=64

second, you divide 2 on both sides to get x by itself, so 64 divided by 2 is 32

4 0
3 years ago
Read 2 more answers
If your starting salary is $40,000 and you  receive a 4.2% raise every year, how much  TOTAL money will you make in 15 years?
Oliga [24]
The first year, the amount is 40,000

the second year is 40000 + 4.2% of 40000, or 0.042 * 4000, so 40000+(0.042*4000)
common factoring that  we get 40000(1 + 0.042), or just 40000(1.042)

in short, the starting amount is 40000, and to get the next term's value you'd use the "common ratio" of 1.042, namely the multiplier of 1.042.

for the third year it'll be 40000(1.042) + (0.042 *40000(1.042) ), again, common factoring that

40000(1.042)(1 + 0.042) or 40000(1.042)(1.042) or 40000(1.042)²

therefore,

\bf \qquad \qquad \textit{sum of a finite geometric sequence}\\\\&#10;S_n=\sum\limits_{i=1}^{n}\ a_1\cdot r^{i-1}\implies S_n=a_1\left( \cfrac{1-r^n}{1-r} \right)\quad &#10;\begin{cases}&#10;n=n^{th}\ term\\&#10;a_1=\textit{first term's value}\\&#10;r=\textit{common ratio}\\&#10;----------\\&#10;a_1=40000\\&#10;r=1.042\\&#10;n=15&#10;\end{cases}&#10;\\\\\\&#10;S_{15}=40000\left( \cfrac{1-1.042^{15}}{1-1.042} \right)\implies S_{15}\approx 40000\left( \cfrac{-0.8536}{-0.042} \right)&#10;\\\\\\&#10;S_{15}\approx 812951.42
5 0
3 years ago
Carla bought a shirt for $14 and a jacket for $69. She gave the cashier $100.
Inessa [10]
Ur answer is 17 dollars cause u add 14 to 69 and u get 83 then you subtract 83 from 100 which equals 17

6 0
3 years ago
Read 2 more answers
3. A medical devices company wants to know the number of MRI machines needed per day. A previous study found a standard deviatio
lozanna [386]

Answer:

173 MRI machines

Step-by-step explanation:

Margin of error E = 0.5

Confidence interval 90% = 1-0.9 = 0.1

Standard deviation = 4 hours

Number of MRI machines needed per day n, = [(z alpha/2 * SD)/E]²

Z alpha/2 = 1.645 at alpha = 0.1

Inputting these values into n we have that

[(1.645*4)/0.5]²

= 13.16²

= 173.18 is approximately equal to 173

The company has to study 173 machines.

6 0
3 years ago
Only answer if you’re sure... will give Brainly thank you :)
PolarNik [594]

Answer:

Step-by-step explanation:

f(x) = x^2 + 3x - x/2

f(x) = x^2 + 2.5x    

   

  • 3x - 1/2x =
  • 6x/2 - 1/2x =
  • 5x/2 =
  • 2.5x

f(6) = 6^2 + 2.5*6

f(6) = 36 + 15

f(6) = 51

3 0
3 years ago
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