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Elden [556K]
3 years ago
12

Ying Zyiyu covers the first 300 miles of a trip traveling at 60 mph. and the last hundred miles traveling at 40 mph. What was hi

s average speed for the entire trip?
Mathematics
1 answer:
UNO [17]3 years ago
7 0

Answer:

53.33 mph

Step-by-step explanation:

Speed is the rate of change of distance with time. Mathematically,

speed = distance/time

and is measured in miles per hour or meter per second.

To get the average speed over the entire trip, we must get the total time  spent on trip and the total distance, then apply the speed formula

Time for the first 300 miles

= 300/60

= 5 hours

Time spent on the last 100

= 100/40

= 2.5 hours

Total time of the trip = 5 + 2.5

= 7.5 hours

Total distance covered

= 300 miles + 100 miles

= 400 miles

Average speed on the trip

= 400/7.5

= 53.33 miles per hour

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These two scalene triangles are similar with a scale of 4:5. What is true about these figures?
disa [49]

Alright, lets get started.

Lets check each possible answer one by one.

We will start from option B.

BC is from small triangle and its corresponding side is DF, so its ratio will be \frac{4}{5} not \frac{5}{4} as given in option. Hence option B is incorrect.

For option C,

Angle a° and angle f° are not similar angles, if they were similar, then only their ratio will be 1 otherwise not 1. Hence option C is incorrect.

For option D,

Angle c° and angle f° are similar angles so, their ratio will be \frac{c}{f}  = 1. Hence option D is incorrect.

Now option A,

ED and AB are corresponding sides. ED is from bigger triangle and AB is from smaller triangle. Their ratio will be \frac{ED}{AB} =  \frac{5}{4}. Hence option A is correct answer.

Hope it will help :)




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2 years ago
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Someone please help me with this
ohaa [14]

the answer is 2.7. 5.0 - 2.3 = 2.7

5 0
3 years ago
The debate team is showing a video of their recent debate. The first showing begins at 3:15 p.m. The second showing starts at 4:
Ghella [55]
Given:
3:15 pm - start of first showing.
30 minutes break;
20 minutes late - 2nd showing.
4:50 - start of second showing.

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4:50 + 0:45 = 5:35 pm end of the 2nd showing.

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2 years ago
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Goryan [66]

Answer:

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Step-by-step explanation:

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We know this is a right triangle, so the third angle is 90deg, leaving us with 90deg for the other two.

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Use the properties of addition to simplify 10v – 4s – 6v +8s.
Bumek [7]

We have that Using strictly  the properties of addition to simplify

10v-6v+4s

From the question we are told

Use the properties of addition to simplify 10v – 4s – 6v +8s.

Generally the equation for the  Statement  is mathematically given as

10v – 4s – 6v +8s.

Therefore

WE collect like terms

10v – 4s – 6v +8s.

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Therefore Using strictly  the properties of addition to simplify

We have

10v-6v-4s+8s

10v-6v+4s

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