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4 years ago

Find the value of x to the nearest tenth

Mathematics

2 answers:

nevsk [136]4 years ago

8 0

$a {}^{2} + b {}^{2} = c {}^{2} \\ a {}^{2} = c {}^{2} - b {}^{2} \\ a = \sqrt{c {}^{2} - b {}^{2} } \\ a = \sqrt{6 ^{2} - 4 {}^{2} } = 4.47$
and because x=2a
$x = 2a \\ x = 2 \times 4.47 = 8.94$

Orlov [11]4 years ago

7 0

Check the picture below.

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Which equation correctly uses point (–2, –6) to write the equation of this line in point-slope form? Y – 6 = y minus 6 equals St

Tanya [424]

Answer:

Step-by-step explanation:

The standard way of writing equation of a line in a point-slope form is as given;

y - y0 = m(x-x0)

m is the slope of the line

(x0,y0) is a point on the line.

Given the point (-2,-6), in order to determine with of the equation that correctly uses the point, we will substitute the point into the formula and get the necessary equation.

y - y0 = m(x-x0)

y - (-6) = m(x-(-2))

y+6 = m(x+2)

Since we are not given the slope, let's assume the slope is 5/2

The equation becomes y+6 =5/2(x+2). Option D is correct

8 0

4 years ago

Solve x2 + 4x – 4 = 0

Damm [24]

Answer:

Quadratic Equations! Yes!

Step-by-step explanation:

Now, there are three methods to solving this:

1.Quadratic Formula

2.Factoring

3. Completing the square

Now, Based on the answers, I think it would be better if we used Quadratic Formula, as you cannot get the answer easily with factoring, and I'm a bit rusty on completing the square.

So, Quadratic Formula! To solve it using this method, we have to find x using this: $x=\frac{-b+-\sqrt{b^{2} -4ac} }{2a}$ (the +- before the square root means it could be both positive or negative)

Where a, b are coefficients and c is a term(in a quadratic equation form: $ax^{2} +bx+c=0$ )

So, we just have to input the stuff from our equation into the formula!

$x=\frac{-4+-\sqrt{32} }{2}$

Now, we can simplify the square root of 32 into 4 times the square root of 2

$x=\frac{-4+-4\sqrt{2} }{2}$

And, we can divide 2 from it all!

$x=-2+-2\sqrt{2}$

So, there you have it! The Answer is C, or 3.

Hope this helps!

4 0

3 years ago

An angle measures 42.6° less than the measure of its complementary angle. What is the measure of each angle?

Setler79 [48]

Answer:

Complementary angle 1st = 66.3°

Complementary angle 2nd = 23.7°

Step-by-step explanation:

Assume;

Complementary angle 1st = a

Complementary angle 2nd = a - 42.6°

Sum of complementary angles = 90°

So,

a + a - 42.6 = 90

a = 66.3

Complementary angle 1st = 66.3°

Complementary angle 2nd = 23.7°

3 0

3 years ago

How do I find the simplest form,for this problem 4-2(3+6)+2-2=

levacccp [35]

Try using PEMDAS,
Parentheses
Exponents
Multiplication
Division
Addition
Subtraction

So just do the problem in that order.

5 0

4 years ago

Does 9, 4 ,and 6 <br> make a triangle

katrin2010 [14]

Answer:

yes

Step-by-step explanation:

To answer this we have to use the triangle theorum. This means that if you add two of the sides, it equals more that the third side. 9+4>6, 6+4>9, and 9+6>4

3 0

4 years ago