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forsale [732]
3 years ago
6

Paula bought 2 video games and a $15 iTunes gift card her total bill was 28.50 write an equation to represent what she purchased

Mathematics
1 answer:
vampirchik [111]3 years ago
7 0
2x+15=28.50 is the answer
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Does anyone know the answer to this ?? PLEASE HELP.
aleksandrvk [35]

Answer:

<u>2,365,200,000 times</u>

Step-by-step explanation:

<u>Given</u> :

  • Average heartbeat rate = 60 times/minute
  • Avg. human lifespan = 75 years

<u>To Find</u> :

  • Number of heartbeats in lifetime of 75 years

<u>Solving</u> :

  • Let the number we require be n
  • n = average heartbeat rate x 60 x 24 x 365 x 75
  • n = 60 x 60 x 24 x 365 x 75
  • n = 3600 x 24 x 365 x 75
  • n = 86400 x 365 x 75
  • n = 31536000 x 75
  • n = <u>2,365,200,000 times</u>
5 0
2 years ago
The per capita electric power consumption level in a recent year in Ecuador is normally distributed, with a mean of 471.5 kilo-w
Olin [163]

Answer:

a) 471.5 kilo-watt hours.

b) 31.76 kilo-watt hours

Step-by-step explanation:

The Central Limit Theorem estabilishes that, for a normally distributed random variable X, with mean \mu and standard deviation \sigma, the sampling distribution of the sample means with size n can be approximated to a normal distribution with mean \mu and standard deviation s = \frac{\sigma}{\sqrt{n}}.

For a skewed variable, the Central Limit Theorem can also be applied, as long as n is at least 30.

For the population:

Mean 471.5 kilo-watt hours.

Standard deviation of 187.9 kilowatt-hours.

For the sample:

Sample size of 35, by the Central Limit Theorem:

a) Mean

471.5 kilo-watt hours.

b) Standard deviation

s = \frac{187.9}{\sqrt{35}} = 31.76

31.76 kilo-watt hours

7 0
3 years ago
5/6 x 1/3= ________<br>​
Nimfa-mama [501]

Answer:

5/18

Step-by-step explanation:

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6 0
2 years ago
Read 2 more answers
If x−2=13, then what is the value of x2−4x+4?
Rus_ich [418]

Answer:

169

Step-by-step explanation:

x−2=13

First find the value of x

x-2+2 = 13+2

x = 15

Now substitute into the expression

x^2 -4x+4

15^2 -4*15+4

225 - 60+4

165+4

169

8 0
3 years ago
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Sometimes, Cindy's little brother interrupts her during homework time. So, she made a triangular "Do Not Disturb" sign to hang o
Marta_Voda [28]

Answer:

A = 1/2(b×h)

Step-by-step explanation:

Area = 1/2(base×height)

6 0
3 years ago
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