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Elena-2011 [213]
3 years ago
5

Solve the quadratic equation below: 4x^2 -100=0

Mathematics
2 answers:
anzhelika [568]3 years ago
6 0

Answer:

solution given:

4x^2 -100=0

4x²=10²

(2x)²=10²so

2x=±10

x=±10/2

so

x=5

or x=-5

GrogVix [38]3 years ago
3 0

Answer:

The answer is x=-5

Step-by-step explanation:

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Which expressions are equivalent. Picture Provided. NO LINKS! NEED ANSWER ASAP
DIA [1.3K]

Answer:

B) 3^-5 <em>(1 / 243)</em> and D) 2^5 x 6^-5 <em>(</em><em>1</em><em> </em><em>/</em><em> </em><em>2</em><em>4</em><em>3</em><em>)</em>

Step-by-step explanation:

3 to the negative 5th power as a fraction is

1 / 243.

2 to the power of 5 multiplied by 6 to the power of negative 5 also equals 1 / 243.

Both expressions are equivalent to 2^5 / 6^5 because they equal the same thing (1 / 243).

3 0
3 years ago
Just wondering what 4r x 3f is? If I could get a reply ASAP that would be nice. I think it's 12rf?
Korolek [52]

Answer:

12rf

Step-by-step explanation:

4 times 3 is 12 and r times f just becomes rf so you are correct.

6 0
4 years ago
A helicopter flying 3590 feet above ground spots the top of a 150-foot y'all cell phone tower at an angle of depression of 77° h
erik [133]

Answer:

794.19 feet.

Step-by-step explanation:

Please find the attachment.

Let x be the distance helicopter needs to fly to be directly over the tower.

We have been given that a helicopter flying 3590 feet above ground spots the top of a 150-foot y'all cell phone tower at an angle of depression of 77°.

We can see from our attachment that helicopter, tower and angle of depression forms a right triangle.

As height of tower is 150 feet, so the vertical distance between helicopter and tower will be 3590-150=3440 feet.

We cab see from our attachment that the side with length 3590-150 feet is opposite and side x is adjacent side to 77 degree angle.

Since we know that tangent relates the opposite side of a right triangle to its adjacent side, so we will use tangent to find the length of x.

\text{Tan}=\frac{\text{Opposite}}{\text{Adjacent}}

Upon substituting our given values in above formula we will get,

\text{Tan}(77^o)=\frac{3590-150}{x}

\text{Tan}(77^o)=\frac{3440}{x}

x=\frac{3440}{\text{Tan}(77^o)}

x=\frac{3440}{4.331475874284}  

x=794.1865\approx 794.19

Therefore, the helicopter must fly approximately 794.19 feet to be directly over the tower.

6 0
3 years ago
If a figure is a square then it is a regular quadrilateal. is this true or false.explain?
Rudik [331]
True. A regular quadrilateral has 4 equal sides. 
4 0
3 years ago
2. Theorem 2-10 states that through a point not on a line, there
erastovalidia [21]

When two or more lines are <u>parallel</u> to each other, this implies that they do not meet even extending them till <em>infinity</em>. So the <em>statement</em> justifies the construction because only <em>one</em> line <u>through</u> point C can be constructed to be <u>parallel</u> to AB.

When a <u>parallel</u> line is constructed through a <em>point</em> to a given <em>line</em>, this is the only <u>parallel</u> line that can be <em>drawn</em> to the given line. <u>Parallel</u> lines are lines that will not meet at any point. Thus, only one <u>parallel</u> line can be constructed through a <em>point</em> not to a given <em>line</em>.

The construction of a line through C that is <u>parallel</u> to line AB is justified by the given <em>statement</em> in the <em>theorem </em>since this is the only <u>parallel</u> line to line AB that can be drawn <em>through</em> the point C. Any <em>other line</em> through C would <em>intersect</em> or <em>meet</em> line AB at a point when <u>extended,</u> thus would not be <u>parallel</u> to the given line.

Visit: brainly.com/question/17967521

6 0
3 years ago
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