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Nady [450]
3 years ago
13

A skateboarder went a kilometer in 3 minutes with the wind, and returned in four minutes against the wind.

Mathematics
1 answer:
inn [45]3 years ago
8 0

Step-by-step answer:

Answer to problems of this kind is the reciprocal of the harmonic mean of the time required.

We need to find the average of the speeds, not the average of the time.

The respective speeds are 1/3 and 1/4.

The average of the speeds is therefore (1/3+1/4)/2 = 7/24  (harmonic mean of the time taken).

The time required is therefore the reciprocal of the unit speed,

T = 1/(7/24) = 24/7 = 3 3/7 minutes, or approximately 3.43 minutes.

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Answer:

answer is 2

Step-by-step explanation:

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2 years ago
23j-21g+20e-13+52e-37j+45-49e<br> (Like terms)
eduard

The solution to the algebraic expression is: 23e - 21g - 14j + 32

What are algebraic expressions?

Algebraic expressions are mathematical expressions that contain variables, coefficients, and arithmetic operations such as addition, subtraction, division, and multiplication.

Solving algebraic expressions are an important part of mathematics as it helps to improve the aptitude and solving skills of the students.

From the given information, we have;

23j - 21g + 20e - 13 + 52e - 37j + 45 - 49e

let's rearrange by taking the like terms to the same sides;

= 23j -37j - 21g + 20e + 52e - 49e - 13 + 45

= -14j - 21g + 23e + 32

= 23e - 21g - 14j + 32

Therefore, we can conclude that the solution to the algebraic expression is: 23e - 21g - 14j + 32

Learn more about solving algebraic expressions here:

brainly.com/question/4344214

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3 0
1 year ago
The new Coat and Jacket Store was ready to open. The workers put out 42 racks of men’s and boy’s coats and jackets with 16 items
Nataliya [291]
42 x 16=672
35 x 24=840

672+840=1512


3 0
2 years ago
Please help asap will give brainliest if correct.
professor190 [17]

Answer:

x¹²,8x⁴,6x,2x,1

Step-by-step explanation:

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x^4(8) =8x⁴

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3 years ago
Quadrilaterals Graphic Organizer
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#Rhombus.

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6 0
2 years ago
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