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nikklg [1K]
3 years ago
5

1) Which graph represents the equation y = 1/2x + 3 Plz help

Mathematics
1 answer:
kakasveta [241]3 years ago
8 0

Answer:

c

Step-by-step explanation:

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Sophie and Simon are peeling a pile of potatoes for lunch in the cafeteria. Sophie can peel all the potatoes by herself in 45 mi
tensa zangetsu [6.8K]
Short Answer: 18 minutes
Remark

The answer to this problem is less than the smallest time of the two people working together. that fact lets out C and D (38 minutes and 75 minutes). Now you have to choose 15 minutes and 18 minutes. There's a method. No guessing needed.

Givens
Let the time for Sophie = S
Let the time for Simon = M
Let the job to completion = 1 
S = 45 minutes
M = 30 minutes

Step One
Convert minutes to hours.
45 minutes = 45 / 60 = 3/4 hour = 0.75 hour
30 minutes = 30 / 60 = 1/2 hour = 0.50 hour

Step Two
Set up the Equation
The formula is a form of job / hour.
Let the time = t that they both have to work

job = 1 in these problems.
1/S + 1/M = 1/t
1/0.75 + 1/0.5 = 1/t

Solve
1 ÷ 0.75 = 1.33333
1 ÷ 0.5 = 2

1.3333 + 2 = 3.33333 
3.3333 = 1 / t                    Multlply both sides by t
3.3333*t = 1
t = 1 / 3.333333333
t = 0.3 of an hour


1 hour = 60 minutes
0.3 hours = x              Cross Multiply
x = 60 * 0.3
x = 18 minutes

Answer working together it took them 18 minutes  <<<<< 
6 0
3 years ago
Read 2 more answers
X + (-x) = 0 help me plz​
andriy [413]

x+-x = 0

x-x = 0

0 = 0

infintely many solutions

7 0
2 years ago
Put it in decimal form plssss………
raketka [301]
The answer is 58, because 2/5 is equal to 0.4, and 0.4 multiplied by 145 is 58.
3 0
3 years ago
Read 2 more answers
Please help with this
Dmitriy789 [7]

Step-by-step explanation:

All has been answered... send me any questions at comments

8 0
2 years ago
Read 2 more answers
WORTH 15 POINTSSSSSSSSS
QveST [7]

Answer:

15

Step-by-step explanation:

Difference in distances = 75-60 = 15 miles

So Car A travels 15 miles more than Car A in an hour

Answered by Gauthmath

4 0
3 years ago
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