MATHEMATICS HIGH SCHOOL

If Ying Zyiyu covers the first 200 miles of a trip going at 50 mph and the last hundred going 40 mph, what was his average speed for the entire trip?

Answers

Answer 1
Answer:

the person covers different distances at different speeds

to find the average speed we have to find the total distance travelled and the total time taken

average speed = total distance travelled / total time taken


first 200 miles

speed - 50 mph

time taken for 50 miles - 1 hour

then time for 200 miles - 1/50 x 200 = 4 hours


last 100 miles

speed - 40 mph

time taken for 40 miles - 1 hour

time for 100 miles - 1/40 x 100 = 2.5 hours


total time taken for a distance of 300 miles - 2.5 + 4 = 6.5 hours


average speed = 300 miles / 6.5 hours = 46.2 mph

average speed is 46.2 mph

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How many ft is in 96 inch

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Good evening,

96 inch=96*1/12 feet=96/12 feet=8 feet

Help please! I have to do this math test and I dont understand ​

Answers

Answer:

y=1x+1

Step-by-step explanation:

y=1x+1 gradient= 1 and y-intersept = 1

I'm struggling on this, please can someone help me?

Answers

Answer:

The vertices of triangle A' are (1, -1), (4, -1), and (4, -3).

Solve: K= 2(11 - k) + 14

Answers

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Put these in order of size smallest first 0.8 30% 3/5

Answers

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Alvin is 5 years younger than elsa. the sum of their ages is 93. what is elsas age

Answers

Answer:

49

Step-by-step explanation:

Given:

Alvin is 5 years younger than Elsa, and the sum of their ages is 93.

  • Let x represent Elsa's age, so Alvin's age would be x - 5 because he is 5 years younger.

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  • Add like terms.

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  • Divide both sides by 2.

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