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tamaranim1 [39]

3 years ago

14

a motorist travelled 20km at an average speed 15km/h .if he made the return journey at an average speed of 30km/h .Find the aver

age speed of the whole journey

1 answer:

scZoUnD [109]3 years ago

8 0

Answer:

20km/h

Step-by-step explanation:

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How many ways can you make change for .55 cents using only nickels, dimes and quarters

lora16 [44]

Answer:

A few ways are:

2 quarters and a nickel

5 dimes and a nickel

1 quarter and 3 dimes

11 nickels

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3 years ago

Farmer John can plant 3/8 of row of crops in 1/8 of his regular work day. If Farmer John works for 8 hours a day. How many days

faust18 [17]

Your answer will be 12 since 8/8 is one whole and you need 12 so your answer is 12

8 0

3 years ago

A person is on the outer edge of a carousel with a radius of 20 feet that is rotating counterclockwise around a point that is ce

lubasha [3.4K]

<h2>Answer:</h2>

$\boxed{(5(-\sqrt{2}+\sqrt{6}),5(\sqrt{2}+\sqrt{6}))}$

<h2>Step-by-step explanation:</h2>

The origin of the coordinate system is the center of the circle. So we have an angle that measures $5\pi/12=75^{\circ}$ . so the x-coordinate and y-coordinate can be found, by using trigonometry as follows:

$x=20cos(5\pi/12)=5\sqrt{6}-5\sqrt{2} \\ \\ Arranging:\\ \\x=5(-\sqrt{2}+\sqrt{6}) \\ \\y=20sin(5\pi/12)=5\sqrt(6)+5\sqrt{2} \\ \\ Arranging:\\ \\y=5(\sqrt{2}+\sqrt{6})$

Finally, the exact value of the position of the rider after the carousel rotates $5\pi/12$ radians is:

$\boxed{(5(-\sqrt{2}+\sqrt{6}),5(\sqrt{2}+\sqrt{6}))}$

3 0

3 years ago

tatyana61 [14]

Answer:

Right

Step-by-step explanation:

360/4 = 90

90° is a right angle

8 0

2 years ago

Brett takes a cab from home to Disneyland. The cabs flat rate is $2.05 and then $0.90 per mile. The total cost of the cab ride w

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Brett is 4 miles away from Disneyland.

0.90 x 4 = 3.60 + 2.05 = 5.65

7 0

3 years ago

Read 2 more answers