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Stolb23 [73]
3 years ago
8

A railroad crew can lay 5 miles of track each day. They need to lay 140 miles of track. The length, L (in miles), that is left t

o lay after d days is given by the following function.
L(d)=140-5d
how many days will it take the crew to lay all the tracks?
how many miles of track does the crew have left to lay after 18 days?​
Mathematics
1 answer:
abruzzese [7]3 years ago
8 0

Answer:

4

Step-by-step explanation:

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given y left parenthesis z right parenthesis equals space fraction numerator z squared minus 1 over denominator z left parenthes
aivan3 [116]

The simplification of the given algebraic expression is;

yz = (z + 1)/z(z - 1)

<h3>How to simplify algebraic expressions?</h3>

We are given y left parenthesis z right parenthesis which is expressed as; yz

Now, we are given the algebraic expression that yz equals space fraction numerator z squared minus 1 over denominator z left parenthesis z minus 1 right parenthesis squared end fraction

z squared minus 1 over denominator z left parenthesis z minus 1 right parenthesis squared end fraction is expressed as; (z² - 1)/z(z - 1)²

Thus, our main expression is;

yz = (z² - 1)/z(z - 1)²

Factorizing the numerator and denominator gives;

yz = (z + 1)(z - 1)/z(z - 1)(z - 1)

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yz = (z + 1)/z(z - 1)

Read more about Algebraic Expressions at; brainly.com/question/4344214

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5 0
1 year ago
Which of the following statements must be true in order for the line represented by the equation y = mx + b to have a negative x
nekit [7.7K]
<span>The signs of the values of m and b<span> are the same.</span></span>
6 0
3 years ago
there is an average of 16 students per teacher at the middle school if 192 students go to the school how many teachers are there
RUDIKE [14]
12 teachers are at this school.
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Isosceles triangle ABC has a perimeter of 96 centimeters. The base of the triangle is and measures 24 centimeters. What is the m
prohojiy [21]
Seeing as it is a isosceles triangle, two sides are the same length as each other.
We have been given the base, at 24cm, the two other sides must be the base taken away from the perimeter;
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Then because the sides are of equal length, you can divide 72 by 2 to get the final length of one of the side lengths:
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Hope this helps! :)
4 0
4 years ago
It won't let me type it out but hurry ahhh​
Ad libitum [116K]

Answer:

its either got to be c or b but id go with the one that you thank it is

Step-by-step explanation:

7 0
3 years ago
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