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3 years ago

-4/9n ÷ 1/15n please help w/explanation and step by step

Mathematics

1 answer:

Sindrei [870]3 years ago

6 0

Answer:

-20n/3n

Step-by-step explanation:

-4 1

--- / ---

9n 15n

Keep, change, flip

- Keep the -4/9n

- Change the division sign to a multiplication sign

- Flip the 1/15n to 15n/1

-4 15n

--- * ---

9n 1

Cross simplify.

9n divided by 3 is 3n.

15n divided by 3 is 5n.

-4 5n

--- * ---

3n 1

-4 times 5n equals -20n

3n times 1 equals 3n

-20n

---

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Nat2105 [25]

Answer:

7. 49

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Step-by-step explanation:

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sin(x) = 6/8 = 3/4

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3 years ago

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Arisa [49]

Answer:

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Step-by-step explanation:

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3 years ago

Y=x+5<br> 4x+y=20<br> Solving system by substitution

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3 years ago

Train A leaves New York for California at the same time Train B leaves California for New York. They are 2900 miles apart. They

professor190 [17]

Answer:

(A) 120 mph

(B) -120 mph

Step-by-step explanation:

Given that,

New York and California are 2900 miles apart,

Both the trains A as well as B travel at an average speed of 120 mph.

Assuming that the path between the starting point in New York and the ending point in California is straight, so the given distance of 2900 miles is actually the shortest distance which is the displacement between the source and destination.

So, the given speed on the straight path is actually the velocity.

Assuming that the velocity is positive in the direction from New York towards California.

(A) So, the velocity of train A (towards California) = 120 mph.

(B) The velocity of train B (towards New York) = -120 mph.

(C) Bothy are moving towards each other, so the relative velocity between them is 120+120=240 mph, and the initial distance between them is 2900 miles.

When they meet, the displacement between them becomes zero, displacement covered= 2900-0=2900 miles.

So, the time, t, taken to cover the displacement 2900 miles with a relative velocity of 240 mph is

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3 years ago

-4/9n ÷ 1/15n please help w/explanation and step by step​

-4/9n ÷ 1/15n please help w/explanation and step by step