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3 years ago

How could a compass be used to determine if two segments are the same length?

Mathematics

1 answer:

Vesnalui [34]3 years ago

8 0

Answer:

answer C.

Step-by-step explanation:

it has the most logical explanation, frankly I'm not the best with circles, but I'm decently sure I'm right

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1.What is the shape of the graph of any quadratic function?

likoan [24]

Answer:

Inverted parabola

Two complex solution

Step-by-step explanation:

any quadratic equation can be expressed in terms of ax^2 + bx + c = 0

It has two solutions which can be found using formula $X =( -b + \sqrt{b^2 -4ac} )/2a \\or \ ( -b - \sqrt{b^2 -4ac} )/2a$

We know that for any value inside the square root function

if it is positive its solution will be real number

for example $\sqrt{9}$ we can have two real solution -3 and 3

if it is negative its solution will be complex number

for example $\sqrt{-9}$ we can have two complex solution

expressed in term of a + ib or a - ib

------------------------------------------------------------------------------------------

Given in the problem

we have ax^2 - bx + c

so its solution will be

$X =( -(-b) + \sqrt{b^2 -4ac} )/2a \\or \ ( -(-b) - \sqrt{b^2 -4ac} )/2a\\\\X =( b + \sqrt{b^2 -4ac} )/2a \\or \ ( b - \sqrt{b^2 -4ac} )/2a\\$

Since in this expression it is given in problem statement that b^2 - 4ac < 0 which will be a negative number and for negative number, its square root is complex number.

also X has two values as given above it will have two solution

hence it will have two complex solution based on above discussion.

Also for any quadratic equation shape of its curve if plotted on coordinate plane is parabolic.

If it has complex solution then curve of such expression will not pass through X axis

7 0

3 years ago

Give examples of 100% increase 100% decrease and 100% error . explain each

Akimi4 [234]

Answer: 100%

Step-by-step explanation:

100+100=200-100=100%

6 0

3 years ago

Which measure of variability is not resistant to extreme values?

monitta

Answer: Range

Step-by-step explanation:

I just did it

6 0

3 years ago

A bus entered the freeway and traveled at a constant speed of 80 mph. Two hours later a second bus followed the first bus, enter

Wittaler [7]

Answer:

It will take about 15-20 Minutes to catch up to that bus.

Step-by-step explanation:

65+ 20= 85 so its a tad bit over but it works.

6 0

2 years ago

Cody, the owner of an e-commerce site, buys emerald pendants for $400 and then sells them

Trava [24]

Answer:

The marked up percentage is 112.5%

Step-by-step explanation:

The cost price of the emerald pendant = $400

The selling price of the emerald pendant = $840

Now, the Mark up Price = Selling Price - Cost Price

= $840 - $400 = $450

Also, $\textrm{Percentage of Mark up Price} = \frac{\textrm{the Marked up price}}{\textrm{The Cost Price}} \times 100$

= $\frac{450}{400} \times 100 = 112.5$

⇒ Percentage of Mark up Price = 112.5%

Hence, the marked up percentage is 112.5%

5 0

3 years ago