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natka813 [3]
3 years ago
14

Need help! Whole answer is on the pic.

Mathematics
1 answer:
White raven [17]3 years ago
4 0

Answer:

a

Step-by-step explanation:

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Working alone and at a constant rate, Machine A takes 3 hours to create a widget. Machine B, working alone and at a constant rat
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Answer:

Time required by Machine B to create a widget = 4 hours

Step-by-step explanation:

Time taken by Machine A ( T_{A} ) = 3 hours

Time taken by Machine B ( T_{B} )= x hours

Time taken by both machines by working together = 12 hours

The time required to both machines by  working together to finish a task is given by the formula = \frac{T_{A} {T_{B} } }{T_{A} + T_{B} }

Put the values in above formula we get

⇒ T =  \frac{3 x}{3 + x}

⇒ 12 =  \frac{3 x}{3 + x}

⇒ 36 + 12 x = 3 x

⇒ x = - 4 hours

This is the time required by Machine B to create a widget.

8 0
3 years ago
if the working age population is 250 million,170 million are unemployed and 9 million are unemployed, the unemployment rate is
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Step-by-step explanation:

9/179

4 0
3 years ago
The line of best fit has the equation y=2.5x-1.5 what does this equation predict for a value of x=7
Anastasy [175]
Y=2.5(7)-1.5
Y=17.5-1.5
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5 0
3 years ago
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Solve the equation using the distributive property and properties of equality.
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3 years ago
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2x + 5<br> Find the val<br> 3x+15
Crank

Answer:

<u>Step 1:  Find the x</u>

2x + 5:  Solve

2x + 5 - 5 = 0 - 5

2x / 2 = -5 / 2

x = -5/2

3x + 15:  Solve

3x + 15 - 15 = 0 - 15

3x / 3 = -15 / 3

x = -5

3 0
3 years ago
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