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nadya68 [22]
3 years ago
11

Working alone, it would take Shandra 40 minutes to sand a table. To sand the same table, also working alone, it would take

Mathematics
2 answers:
hichkok12 [17]3 years ago
8 0

Answer:

1/40+1/60=1/t  is best  describes Shandra's claim.

Step-by-step explanation:

Finding average of both Shandra and Kelly working time is wrong way to find the time taken when they both work together. The correct way to find time taken when they both work together is:

\frac{1}{40} +\frac{1}{60} =\frac{1}{t} \\

\frac{3 + 2}{120} = \frac{5}{120} =\frac{1}{t}

t=24

Hence, When both Shandra and Kelly are working together they take 24 minutes to complete the work.

egoroff_w [7]3 years ago
3 0

Answer:  it will take them about 24 minutes working together

Step-by-step explanation:

1/40    +   1/60 =

6/240 +  4/240 = 10/240 = 1/24

1/24 = 1/t

Cross multiplication:

1*t = 1*24  

t= 24

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3 0
3 years ago
How do you solve 3/5 times 2/3
UkoKoshka [18]
Hello! And thank you for your question!

First use the rule: A/b x c/d = ac/bd

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3 0
3 years ago
Divide by long division:<br> (3d^2+2d-29)/(d+3)
Vesna [10]
The dividend of the given expression above is,
     3d² + 2d - 29

and its divisor is equal to d+3. The steps in the long division are written below.

1. First, divide the first term of the dividend (3d²) by first term of the divisor (d). This gives us 3d. 

2. Next, multiply the answer, 3d, by the divisor (d+3). This gives us 3d² + 9d.

3. Then, subtract the answer, 3d² + 9d from the dividend, 3d²+2d-29. This gives us,

                      -7d - 29

4. Next, divide the first term of -7d by the first term of the divisor, d. This gives us the answer of -7.

5. Next, multiply the answer, -7, by the divisor, d+3. This gives us -7d-29

6. Then, subtract the answer in step 5 from the answer in step 3. This gives us,
     -7d-29 - (-7d-39) = 0

7. Combining the answer in steps 1 and 4 for the final answer will give us the answer of
          3d-7

<em>Answer: 3d-7</em>


7 0
3 years ago
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