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sertanlavr [38]
3 years ago
9

On the first day of a trip, the Brenner family hikes 2.8 miles. On the second day, they hike 1.25 along a trail. They take a bre

ak, and hike back to where they started. Did they hike more the first day or the second day? Explain.
Mathematics
1 answer:
Vadim26 [7]3 years ago
8 0
They hiked more on the 2nd day because they are retracing their steps.
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( simultaneous equations)
daser333 [38]

Answer:

See method below.

Step-by-step explanation:

m/n + n/3 = 2

2/m + n = 4    

First  eliminate the fractions by multiplying the first equation by 3n:-

3m + n^2 = 6n...........(1)

and the second equation by m:-

2 + mn = 4m..............(2)

Now we solve using substitution:-

From equation  (2):-

4m - mn = 2

m = 2 / (4 - n)

Now substitute for m in equation (1):-

6/ (4 - n) + n^2 = 6n

6 + n^2(4 - n) = 6n(4 - n)

6 + 4n^2 - n^3 = 24n - 6n^2

n^3 - 10n^2 + 24n - 6 = 0

This will not factor so we could solve this using graphical software.

To find the values of the variable m we substitute the found values of n into one of the original equations and solve for m.






6 0
3 years ago
What is the area of a rectangle if one side has a length of 12x^3 and
mojhsa [17]

Answer:

The area of this rectangle is 72x^5

Step-by-step explanation:

A = l ∙ w

Let, l = length

Let, w = width

Step 1: Substitute the length and width for the two given values

    1. A = (12x³)(6x²)

Step 2: Multiply

    1. A = 72x^5

   

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I believe it’s 84.50
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Shea and her best friend Kelly both babysit during the summer. Shea charges $4 per hour plus a $3 service fee, while Kelly charg
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4h+3=The Pay of Shea 3.5h +6= The pay of Kelly 4h+3=3.5h+6 -3 -3 4h=3.5h+3 -3.5h .5h=3 *2 *2 h=? Then stick "h" into one of the original equations and solve for someones pay to get "p" 3.5(h)+6=p OR 4(h)+3 =p
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Maribel thinks the tens digit goes up by 1 in these numbers. Do you agree?
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