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2 years ago

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The student measured the length of a room and obtained the measurement of 3.99m. If the percentage error of his measurement was

5% and his own measurement was smaller than the length,what is the length of the room

1 answer:

erma4kov [3.2K]2 years ago

4 0

Answer:

Step-by-step explanation:

what grade is you inn ???????????

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Louisa ran at an average speed of five miles per hour along an entire circular park path. Calvin ran along the same path in the

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Answer:

15 miles

Step-by-step explanation:

Let $x$ be the miles in the circular park path, $t_{L}$ the time Louisa takes to finish and $t_{C}$ the time Calvin takes to finish both in hours.

Then $x$ , the longitude is equal to the velocity times the time used to finish. So

$x=5t_{L}$

$x=6t_{C}$

And the difference between Louisa's time and Calvin' time is 30 minutes, half an hour. So:

$t_{C}=t_{L}-0.5$

Three equations, three unknowns, the system can be solved.

Equalizing the equation with x :

$5t_{L}=6t_{C}$

In this last equation replace $t_{C}$ with the other equation and solve:

$5t_{L}=6(t_{L}-0.5)\\ 5t_{L}=6t_{L}-3\\ 3=6t_{L}-5t_{L}\\ 3=t_{L}\\ t_{L}=3$

With Louisa's time find x:

$x=5t_{L}\\ x=5(3)\\ x=15$

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2 years ago

A bag contains 10 black marbles and 6 red marbles. If a red

bonufazy [111]

Answer:

66.67% probability of selecting a black marble from the bag.

Step-by-step explanation:

Initially there are 16 marbles, 10 of which are black and 6 of which are red.

A red marble is drawn and not put back. So now there are 15 marbles, of which 10 are black.

So there is a 10/15 = 2/3 = 0.666% 7 = 66.67% probability of selecting a black marble from the bag.

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2 years ago

A math teacher who likes baseball conducts a survey of 100 students. He asked the students about their favorite sport and about

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Answer:

46%

Step-by-step explanation:

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2 years ago

Simplify negative 2 and 1 over 6 − negative 7 and 1 over 3. Please help!

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2 years ago

The ratio of berries to Oranges is 10:1 if there are 25 oranges how many berries would there be

Yuki888 [10]

Answer:

250 berries

Step-by-step explanation:

10 to 1 means 10 times as many berries as oranges

25x10=250

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3 years ago