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tia_tia [17]
3 years ago
14

Johnny mows 6 yards in 1 hour, and he has 21 yards to mow. How long will it take him?

Mathematics
2 answers:
Natali5045456 [20]3 years ago
7 0
This is a proportion equation. 6 yards in 1 hour is 21 yards to x hours. 

x=hours it takes to mow 21 yards

1) Set up your proportion: 6 yards / 1 hour = 21 yards / x hours
2) Now you cross multiply.  (6*x)=(1*21)
3) 6x=21
4) Divide both sides by 6
5) x=3.5

So Johnny can mow 21 yards in 3.5 hours.

Hope this helps!  :)
choli [55]3 years ago
4 0
3hrs and 30mins long
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To write: third root of x to the fourth power, to the fifth power into an expression with a rational exponent

Solution:

Exponent refers to the number of times a number is multiplied to itself.

Exponent is sometimes also known as power.

Third roots of x=x^{\frac{1}{3} }

Third root of x to the fourth power(x^{\frac{1}{3} })^4 =x^{\frac{4}{3} }

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Consider the function f(x)=−3x+3 on the interval [−8,4]. Find the absolute extrema for the function on the given interval. Expre
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By means of <em>functions</em> theory and the characteristics of <em>linear</em> equations, the <em>absolute</em> extrema of the <em>linear</em> equation f(x) = - 3 · x + 3 are 27 (<em>absolute</em> maximum) for x = - 8 and - 9 (<em>absolute</em> minimum) for x = 4. (- 8, 27) and (4, - 9).

<h3>What are the absolute extrema of a linear equation within a closed interval?</h3>

According to the functions theory, <em>linear</em> equations have no absolute extrema for all <em>real</em> numbers, but things are different for any <em>closed</em> interval as <em>absolute</em> extrema are the ends of <em>linear</em> function. Now we proceed to evaluate the function at each point:

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Absolute minimum

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By means of <em>functions</em> theory and the characteristics of <em>linear</em> equations, the <em>absolute</em> extrema of the <em>linear</em> equation f(x) = - 3 · x + 3 are 27 (<em>absolute</em> maximum) for x = - 8 and - 9 (<em>absolute</em> minimum) for x = 4. (- 8, 27) and (4, - 9).

To learn more on absolute extrema: brainly.com/question/2272467

#SPJ1

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