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KengaRu [80]
3 years ago
12

Christina earns $250 a week. To budget money, she pays $135 in bills each week. How much money does Christina have left at the e

nd of the month?
Mathematics
1 answer:
Rama09 [41]3 years ago
7 0

Answer:

460 USD

Step-by-step explanation:

monthly earnings = 250 x 4 = 1000

monthly bills = 135 x 4 = 540

end of month = 1000 - 540 = 460 USD

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)A scanner scanned 63 photos in 9 minutes. If it scans photos at a constant rate, it can scan _____ photos in 21 minutes.
Cloud [144]

Answer:

147 photos

Step-by-step explanation:

63 photos -> 9 minutes

To find the number of photos scanned per minute, divide both sides by 9.

63\div 9=7 photos -> 1 minute

To find 21 minutes, we can do 21\times 7=147

3 0
3 years ago
( BONUS POINTS PLEASE HELP ) the bases of a trapezoid are 24 ft and 6ft the height of the trapezoid is 12 ft what is the area of
klasskru [66]

Answer:

1728

Step-by-step explanation:

I cant understand the question that well but i think this is the right one

5 0
2 years ago
Read 2 more answers
The Aluminum Association reports that the average American uses 56.8 pounds of aluminum in a year. A random sample of 50 househo
nalin [4]

Answer:

\mu = 56.8

\sigma = 12.1

A)what is the probability that the sample mean will be More than 58 pounds

P(x>58)

Formula : Z=\frac{x-\mu}{\sigma}

Substitute the values :

Z=\frac{58-56.8}{12.1}

Z=0.09917

refer the z table

P(x<58)=0.5359

P(X>58)=1-P(x<58)=1-0.5359=0.4641

Hence the probability that the sample mean will be More than 58 pounds is 0.4641

B)what is the probability that the sample mean will be More than 57 pounds

P(x>57)

Formula : Z=\frac{x-\mu}{\sigma}

Substitute the values :

Z=\frac{57-56.8}{12.1}

Z=0.0165

refer the z table

P(x<57)=0.5040

P(X>57)=1-P(x<57)=1-0.5040=0.496

Hence the probability that the sample mean will be More than 57 pounds is 0.496

C)what is the probability that the sample mean will be Between 55 and 57 pound

Formula : Z=\frac{x-\mu}{\sigma}

Substitute the values :

Z=\frac{57-56.8}{12.1}

Z=0.0165

refer the z table

P(x<57)=0.5040

Formula : Z=\frac{x-\mu}{\sigma}

Substitute the values :

Z=\frac{55-56.8}{12.1}

Z=-0.1487

refer the z table

P(x<55)=0.4443

P(55<x<57)=P9x<57)-P(x<55) =0.5040-0.4443=0.0597

Hence the probability that the sample mean will be Between 55 and 57 pounds is 0.0597

D)what is the probability that the sample mean will be Less than 53 pounds

Formula : Z=\frac{x-\mu}{\sigma}

Substitute the values :

Z=\frac{53-56.8}{12.1}

Z=−0.314

refer the z table

P(x<53)=0.3783

The probability that the sample mean will be Less than 53 pounds is 0.3783

E)what is the probability that the sample mean will be Less than 48 pounds

Formula : Z=\frac{x-\mu}{\sigma}

Substitute the values :

Z=\frac{48-56.8}{12.1}

Z=−0.727

refer the z table

P(x<48)=0.2358

The probability that the sample mean will be Less than 48 pounds is 0.2358

5 0
3 years ago
What's -0.25 as a fraction
sattari [20]

Answer:

0.25 is a quarter so 1/4

then -1/4

5 0
3 years ago
The sum of one and the product of fourand a letter x​
Anastasy [175]

Answer:

4x+1

Step-by-step explanation:

Ok, so it will be easier to write it out. "The sum of one and the product of four and x" written out is like this: 4x+1, because 4 is the coefficient with x. I am assuming you need the algebraic expression. Hope this helps!

4 0
3 years ago
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