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2 years ago

HELP PLSSSSSSSSSSSSS

Mathematics

2 answers:

Free_Kalibri [48]2 years ago

8 0

Answer:

14 miles per hour

Step-by-step explanation:

49/3.5= 14

Hope this helps!

pls mark brainliest if correct

Kisachek [45]2 years ago

3 0

Answer:

14 miles per hour because to find the speed, use the formula speed = distance / time. 49 / 3.5 = 14.

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aalyn [17]

The question is missing the graph. So, the graph is attached below.

Answer:

The maximum speed of the train is $V=240\ km/h$

Step-by-step explanation:

Given:

Distance travelled is 100 km.

Time interval is 30 minutes.

We know that, area under the curve of a speed-time graph gives the total distance travelled by the train.

The area under the curve is the area of the given trapezium shape shown in the graph below.

The height of the trapezium is equal to the maximum speed of the train represented by 'V' km/h. The parallel sides are of lengths equal to (25 - 5 =) 20 min and (30 - 0 =) 30 min.

Converting the units of parallel sides from minutes to hours we get:

$30\ min=\frac{30}{60}=\frac{1}{2}\ h\\20\ min=\frac{20}{60}=\frac{1}{3}\ h$

Now, area of a trapezium is given as:

$Area=\frac{1}{2}\times\textrm{Sum of parallel sides}\times \textrm{Height}\\\\Area=\frac{1}{2}(\frac{1}{2}+\frac{1}{3})(V)\\\\Area=\frac{1}{2}(\frac{3+2}{6})(V)\\\\Area=\frac{1}{2}(\frac{5}{6})(V)\\\\Area=(\frac{1\times 5}{2\times6})(V)\\\\Area=\frac{5}{12}(V)$

Now, area under the curve is equal to the distance travelled. So,

$\frac{5}{12}(V)=100\\V=\frac{100\times12}{5}\\V=240\ km/h$

Therefore, the maximum speed of the train is $V=240\ km/h$

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2 years ago

Samual has an egg farm with a volume of 375 in.³ with the width of an ant farm is 2.5 inches and the length is 15 inches what is

omeli [17]

Answer:

The height is 10in

Step-by-step explanation:

If you need to calculate the volume, you need to know the formula. The formula is length x width x height. You have the length and width, so you need the height. 2.5in x 15in x 10in = 375 in^3. You may ask why it is inches cubed instead of inches. It is inches cubed because you multiplied three inches together.

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2 years ago

3) Find the value of FD. bited F 12 12 13x - 16 E 4x+11 D

vlada-n [284]

The Length of FD = 26 cm

According to the given information

FE = FC = 12cm

As FE, FC both are radius of circle

The tangent segments to a circle from a external point are equal

Hence

CD = ED

13x - 16 = 4x + 11

13x - 4x = 11 + 16

9x = 27

x = 27/9

x = 3

CD = 13x - 16

= 13 × 3 - 16

= 23 cm

ED = 4x + 11

= 4 × 3 + 11

= 23 cm

In Triangle FED

FE is perpendicular to ED

According to Pythagoras Theorem

$FD^{2}= FE^{2}+ED^{2}$

= $12^{2}+ 23^{2}$

= 673

FD = 26 cm approx.

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To know more about Pythagoras Theorem

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