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juin [17]
3 years ago
12

HELP ME WITH THIS PLEASE

Mathematics
1 answer:
Evgesh-ka [11]3 years ago
5 0

Answer:

-15

Step-by-step explanation:

The ride goes 15 meters into the ground, as it was raised 50 meters and fell 65 meters

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A train travels train travels 288 kilometre at a uniform speed. If the speed had been 4 kilometre per hour more it would have ta
kiruha [24]

Answer:

Let the speed of the train be x km/h.

Case 1:

Distance = 288 km

Speed = x km/h

Time = Distance/Speed

= 288/x h

Case 2:

Distance = 288 km

Speed = (x+4) km/h

Time = 288/x + 4 h

Since 288/x > 288/x + 4

288/x - 288/x+4 = 1

288[1/x - 1/x+4 ] = 1

[ x + 4 - x / x(x + 4) ] = 1/288

[4 / x^2 + 4x ] = 1/288

x^2 + 4x = 1152

x^2 + 4x - 1152 = 0

x^2 + 36x - 32x - 1152 = 0

x(x + 36) - 32(x + 36) = 0

(x + 36)(x - 32) = 0

x + 36 = 0 , x - 32 = 0

x = -36 , x = 32

x = -36 , rejected since speed cannot be negative.

Therefore , speed of the train = 32 km/h

4 0
3 years ago
A girl can run 6 2/3 metres in one second. How long will it take her to run 100 metres?
Crank

Answer:

15 seconds

Step-by-step explanation:

How did i get this answer? It is apparent that the girl is capable of running 6 2/3 metres per one second and she must run 100 metres.

First, let's convert 2/3 into a decimal so that it is easier to calculate later. 2/3=0.667 (you can also just do 2 divide by 3 and will end up with the same number)

Now our numbers are 6.667 and 100. Let's divide 100 by 6.667 which estimates to 15

7 0
2 years ago
Read 2 more answers
An architect makes a model of a new house. The model shows a tile patio in the backyard. In the​ model, each tile has length
zvonat [6]

The two ways to find the ratio of the length is to turn the inches into feet or the feet into inches

So the answer can be solved like this:

1/36ft to 1/4ft which is 9:1 (blueprint size to actual size)

or

1/3in to 3in which is also 9:1 (blueprint size to actual size)

3 0
3 years ago
A builder could get 9 sheets of Sheetrock for $20. If he bought 15 sheets, how much money would he have spent?
lora16 [44]
$33.33

20/9 = $2.22 per sheet
$2.22*15 = $33.33
4 0
3 years ago
Read 2 more answers
Jack bought 4 dozen eggs at $10 per dozen. 6 were broken. what percent of his money goes to waste
erik [133]

he paid = 4*10 = $40

48 eggs = $40

so, waste money would be 6/48 * 100 = 12.5%

5 0
3 years ago
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