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Natali [406]
3 years ago
7

PLEASE HELP ASAP!!

Mathematics
1 answer:
bearhunter [10]3 years ago
7 0

Answer:

equation: 3.5x=31.5

number of hours: 9

Step-by-step explanation:

31.5/3.5=9

Therefore,

x=9, x=number of hours, number of hours=9

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The length of a rectangle is six times its width. if the area of the rectangle is 384 yd2 , find its perimeter.
barxatty [35]
Width= w
lenght = 6 width = 6w

area= 284 yd²
       = (width)(length)
       = (w)(6w)
       = 6w²

6w²= 284
w²= 284/6
    = 47.333333....
w=√47.2
  = 6.88 inches

perimenter = 2width+ 2 lenght
                  = 2(w) + 2(6w)
                  = 2w+12w
                  = 14w
                  = 14(6.88)
                  = 96.28 inches

7 0
4 years ago
george’s average bowling score is 180; he bowls in a league where the average for all bowlers is 150 and the standard deviation
scoray [572]
Bill is better bowler than George.

To decide who's the relative better bowler, George or Bill, I've first drawn bell curves for each of their leagues. George's league is in red mean is 150 a standard deviation of 20. And Bill's League Demean is higher at 160, but the standard deviations it is lower at 15, so I've numbered my bell curve by 15.

Now to decide who's relative better bowler, I'm going to calculate their Zscores for George, His observed value is 180, which would fall right here on our number line, and his Z score is gonna be 180- the mean. So he's 30 points above the mean, Divided by the standard deviation (180-150)/20=1.5 And then for bill, we're going to do the same thing. His score is also, let's see here his score is 190,(190-160)/15=2And you can probably see just by marking that on the bell curve, that that's actually two standard deviations above the ME, which is more than George is 1.5 standard deviations above the mean. So we can say that Bill is better bowler.

To learn more about mean Visit:
https://brainly.in/question/11858484

#SPJ9

3 0
1 year ago
Plz help me!!!!!!!!!!!!!!!!
Serga [27]

Answer:

Well for number 3 it is the fourth join

And for four is the second option

Step-by-step explanation:

Number three is the fourth choice because all you do is take the two numbers and put the colun there.

And for number four is the second option because you do the same

LET ME KNOW ON HOW YOU DID IN THE COMMENTS!!

6 0
3 years ago
Read 2 more answers
Paul worked as a library volunteer for 8 ¼ hours. Harry worked for 3 ½ hours. How much longer did Paul work than Harry?
stiks02 [169]

Answer:

4 3/4

Step-by-step explanation:

= (8 - 3) + (1/4 - 1/2)

= 5 + 1/4 - (1 x 2 over 2 x 2)

= 5 + 1/4 - 2/4

= 5 and (1/2 over 4)

= 5 + -1/4

= 4 3/4

8 0
3 years ago
24. The original price of a DVD is $9. The sale price is 20% off
olasank [31]

20/100 = 0.20

0.20 * 9 = 1.8

9 - 1.8 = 7.2

The sale price of the DVD is $7.20.

7 0
4 years ago
Read 2 more answers
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