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Yuliya22 [10]
2 years ago
15

Working together, Sam and Charlie can change all the light bulbs in the office building in 3 hours. It would have taken Charlie

8 hours to do the job alone.
A table showing Rate in part per hour, Time in hours, and Part of Light Bulbs Changed. The first row shows,Sam, and has r, 3, and r times 3. The second row shows Charlie, and has StartFraction 1 Over 8 EndFraction, 3 and StartFraction 1 Over 8 EndFraction times 3.
Which equation can be used to solve for the rate, r, for Sam to change all the light bulbs in the office building by himself?

3r = 3 r equals StartFraction 3 Over 8 EndFraction.
3r + 3 r plus StartFraction 3 Over 8 EndFraction equals 1. = 1
r + StartFraction 1 Over 3 EndFraction r plus StartFraction 3 Over 8 EndFraction r equals 1.r = 1
r + StartFraction 1 Over 3 EndFraction r plus StartFraction 1 Over 8 EndFraction r equals 1.r = 1
Mathematics
2 answers:
Virty [35]2 years ago
6 0

Answer:

B

3r + 3/8=1

Step-by-step explanation:

EDGE

vitfil [10]2 years ago
4 0

Answer:

b

Step-by-step explanation:

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Answer:

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4 0
3 years ago
Express 29 and 37 as the sum of two squares.
kotykmax [81]

Answer:

See below

Step-by-step explanation:

{5}^{2}  +  {2}^{2}  = 25 + 4 = 29 \\  \\  {6}^{2} + {1}^{2}  = 36 + 1 = 37

3 0
2 years ago
Doris made 80 cookies this week. She baked 4 less than three times the total she made last week. Which equation, when solved for
sertanlavr [38]

Answer:

The equation is  3x-4=80

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Step-by-step explanation:

Let

x ---->  the number of cookies she baked last week

we know that

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so

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3x-4=80

solve for x

3x=80+4\\3x=84\\x=28\ cookies

3 0
3 years ago
If Jake buys 3 new shirts, how many of them would you expect to be t-shirts, and how many would you expect to be collared?
Sophie [7]

Answer:

2 t-shirts ; 1 collar shirt

Step-by-step explanation:

We need to first obtain the ratio of T - shirts to collar shirts :

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Hence, using the ratio obtained ; if Jake buys 3 new shirts :

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Median: 3

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6 0
3 years ago
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