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MArishka [77]
3 years ago
7

The top of a ladder must extend how many feet above the surface a worker is climbing onto?

Computers and Technology
1 answer:
Alika [10]3 years ago
6 0
<span>The answer is THREE FEET. This is part of the safety precautions that must be taken when using ladder. Other safety precautions include: only used inspected and certified ladders, keep ladders at least ten feet away from power lines, do not use ladder on slippery surfaces, etc.</span><span />
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simplify the expression below and state the value of m for which the simplified expression is not defined 2m² + m - 15/ m² - 9​
motikmotik

Answer:

  • The simplified expression is: \frac{2m-5}{m-3}
  • The simplified expression is undefined for m=3

Explanation:

The given expression is:

\frac{2m^2+m-15}{m^2-9}

The numerator can be siplified by using factorization and denominator will be simplified using the formula

a^2-b^2 = (a+b)(a-b)

So,

= \frac{2m^2+6m-5m-15}{(m)^2-(3)^2}\\=\frac{2m(m+3)-5(m+3)}{(m-3)(m+3)}\\=\frac{(2m-5)(m+3)}{(m-3)(m+3)}\\=\frac{2m-5}{m-3}

A fraction is undefined when the denominator is zero. In order to find the value of m on which the simplified fraction will be undefined we will put denominator equal to zero.

So,

m-3 = 0 => m = 3

Hence,

  • The simplified expression is: \frac{2m-5}{m-3}
  • The simplified expression is undefined for m=3
7 0
3 years ago
Consider the cement used for the foundation; the bricks and timber used for the walls; and the shingles used for the roof. All o
gavmur [86]
<span>Consider the cement used for the foundation; the bricks and timber used for the walls; and the shingles used for the roof. All of these are __________ in making the house.

A. Elements</span>
6 0
3 years ago
What are the network topologies? Advantages and disadvantages.
s344n2d4d5 [400]
Network topology is the arrangement of the elements of a communication network. Network topology can be used to define or describe the arrangement of various types of telecommunication networks, including command and control radio networks, industrial fieldbusses and computer networks.

Advantages:

It is easy to handle and implement.

It is best suited for small networks.

Disadvantages:

The cable length is limited. This limits the number of stations that can be connected.

This network topology can perform well only for a limited number of nodes.
6 0
2 years ago
Terri needs to insert a cover page into her document. Where should she go to access the commands to do so? Insert tab, Objects g
dexar [7]

Answer:

Insert tab, Pages group

Explanation:

It just be like dat

7 0
2 years ago
Part B: Find the value of G: if A = 3, b=4, and C = 5.
antiseptic1488 [7]

Answer:

G=(A^3 + B) * 4-c^2

To calculate G if A=3, b=4 and C=5

cobegin

p1: A^3 = 27

P2:C^2 =25

P3: p1 +B =31

P4:P3*4 =124

P5:P4-P2 =99

coend

Explanation:

One operation is performed at a time, and on the basis of priority as we have only one processor.

6 0
3 years ago
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