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k0ka [10]
3 years ago
13

Two beauticians, Lydia and Jackie, are working on your hair. Lydia can complete the work in 2 hours, while Jackie can complete t

he work in 1 hour. How many hours do the beauticians take if they work together?
The choices are:
- 1/2
- 3/2
- 2/3
- 4/3
Mathematics
2 answers:
ycow [4]3 years ago
8 0

Answer:

the answer is 2/3 i just took the test

Step-by-step explanation:

ella [17]3 years ago
6 0
Both working at the same time:

if
1 job = 2 hours
1 job = 1 hour
------------------- (adding) 
2 jobs = 3 hours
or
1 job = 3/2 hours

the answer is 3/2 hours
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The bottom of a doorway to a building is 3.45 feet above the ground, and a ramp to the door for the disabled is at an angle of 6
Darya [45]

Answer:

The ramp should be 32.9 feet longer.

Step-by-step explanation:

When the ramp is at 6^{o} to the ground, its length can be determined by applying the appropriate trigonometric function. Let the length be represented by l, so that;

Sin θ = \frac{opposite}{hypotenuse}

Sin 6^{o} = \frac{3.45}{l}

l = \frac{3.45}{Sin 6^{o} }

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When the angle is reduced to 3^{o}, the length of the ramp would be;

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 = \frac{3.45}{0.05234}

= 65.9152

l = 65.9 feet

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The ramp should be 32.9 feet longer.

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