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3 years ago

If 4x^2 - 100 = 0 then the roots of the equation are

2 answers:

8 0

4x² - 100 = 0
 + 100 + 100
 4x² = 100
 4 4
 x² = 25
 x = +5
4(5)² - 100 = 0
4(25) - 100 = 0
100 - 100 = 0
 0 = 0

4(-5)² - 100 = 0
4(25) - 100 = 0
 100 - 100 = 0
 0 = 0

The roots of the equation is positive or negative 5.

Alex17521 [72]3 years ago

6 0

4x^2-100=0
4x^2=100
x^2=100/4
x^2=-25
x=5 or x=-5

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Answer:

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all the population of the country

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3 years ago

Select other ways to express 10². Mark all that apply.

Elanso [62]

F and D is the answer
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3 years ago

Read 2 more answers

Sara and Paul are on opposite sides of a building that a telephone pole fell on. The pole is leaning away from Paul at

r-ruslan [8.4K]

Answer:

a) See figure attached

b) $x = \frac{sin(124)}{sin(34)} 80.086 = 118.732 ft$

c) $h = 35 sin (59) = 30.0 ft$

So then the heigth for the building is approximately 30 ft

Step-by-step explanation:

Part a

We can see the figure attached is a illustration for the problem on this case.

Part b

For this case we can use the sin law to find the value of r first like this:

$\frac{sin(22)}{35 ft} =\frac{sin(59)}{r}$

$r= \frac{sin(59)}{sin(22)} 35 ft = 80.086ft$

Then we can use the same law in order to find the valueof x liek this:

$\frac{sin(124)}{x ft} =\frac{sin(34)}{80.086}$

$x = \frac{sin(124)}{sin(34)} 80.086 = 118.732 ft$

And that represent the distance between Sara and Paul.

Part c

For this cas we are interested on the height h on the figure attached. We can use the sine indentity in order to find it.

$sin (59) = \frac{h}{35}$

And if we solve for h we got:

$h = 35 sin (59) = 30.0 ft$

So then the heigth for the building is approximately 30 ft

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3 years ago

What is the sign of -4-8

dusya [7]

Answer:

The sign should be negative ( - )!

Step-by-step explanation:

-4 - 8 = -12

Please mark Brainliest!!! =D

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3 years ago

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Anni [7]

Answer:

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Step-by-step explanation:

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3 years ago