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qwelly [4]
3 years ago
13

Rachel's learning to play the violin Monday through Friday she practices 45 minutes on each day on Saturday and Sundays he broug

ht his one and a half hours each week how long did you practice for in a week
Mathematics
1 answer:
I am Lyosha [343]3 years ago
5 0

Rachel spends 6 hours 45 minutes a week trying to learn to play the violin.

Step-by-step explanation:

Step 1; Rachel learns for 45 minutes a day from Monday through Friday and in the weekend she learns to play the violin for one and a half hours. So she learns for the following periods of time

Monday - 45 minutes

Tuesday - 45 minutes

Wednesday - 45 minutes

Thursday - 45 minutes

Friday - 45 minutes

Saturday - 90 minutes (60 × 1.5 hours)

Sunday - 90 minutes (60 × 1.5 hours)

Step 2; To determine how much time she practices in a week we just add the individual times she plays on each day.

Total time practices in a week = 45 + 45 + 45 + 45 + 45 + 90 + 90 = 405 minutes = 6 hours 45 minutes.

           

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Answer: 20 ft

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<u />

Now, if we measure the shadow of the flagpole and the shadow of the person, <u>at the same moment</u>, we can use the first Thales' Theorem to calculate the height of the flagpole, knowing the height of the person.

In this case we have two similar triangles (Figure attached) where H is the height of the flagpole, h=6 ft is the height of the person, A=5 ft is the length of the shadow of the flagpole and a=1\frac{1}{2}=1.5 ft is the length of the shadow of the person.

Having this clear, we can write the following relation with both similar triangles:

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4 0
3 years ago
What is the zero for 2x2-7=4
rosijanka [135]
2x^2-7=4
subtract 4 from both sdies
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therefor
2x^2=11
divide by 2
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6 0
3 years ago
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Step-by-step explanation:

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Step-by-step explanation:

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Question 5 of 10
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