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svp [43]
3 years ago
11

When Sandy and Allen's mother decorates the house for a holiday by herself, it takes her 5 hours. When both Sandy and Allen help

, the three can finish the job in 2.5 hours. When only Allen helps his mother decorate, it takes the two 3.5 hours. How long would it take Sandy to decorate the house by herself?
Mathematics
2 answers:
Reil [10]3 years ago
7 0

Answer:

5 hours

Step-by-step explanation:

saveliy_v [14]3 years ago
5 0

Answer:

8 3/4

Step-by-step explanation:

time for all work:

Mother - 5 hours

Mother + Sandy + Allen - 2.5 hours

Mother + Allen - 3.5 hours

Sandy - x

In 1 hour

Mother - 1/5

Mother + Sandy + Allen - 2/5

Mother + Allen - 2/7

Sandy - 1/x

(M+S+A) - S = (M+A)

2/5 - 1/x = 2/7

solve equation

x = 8 3/4 hours

Hope this helps :)

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3(x+2)=2(x+5) find the solution
ankoles [38]

Answer:

x=4

Step-by-step explanation:

Step 1: Simplify both sides of the equation.

3(x+2)=2(x+5)

(3)(x)+(3)(2)=(2)(x)+(2)(5)(Distribute)

3x+6=2x+10

Step 2: Subtract 2x from both sides.

3x+6−2x=2x+10−2x

x+6=10

Step 3: Subtract 6 from both sides.

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4 0
2 years ago
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Comparing decimals 0.49 to 0.94 is that equal ? or 0.94 more..?​
ddd [48]

the simple fact that 94 is 49 backwards means nothing, anymore than say 001 and 100 are equal quantities or related other than in the digits.

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8 0
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lukranit [14]

Answer:

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Step-by-step explanation:

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What is 1/4+1/3+ 1/6+1/8+1/8
GarryVolchara [31]
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Must have same denominators
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Answer: 1

7 0
3 years ago
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How do you do this ?
oksian1 [2.3K]
So the 3x means three times then u multiply by three
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