$a) \: \cos(39°) = \frac{x}{7} \Leftrightarrow x = 7\cos(39°) \approx5.44 \\ b) \: \sin(46°) = \frac{8}{x} \Leftrightarrow x = \frac{8}{\sin(46°)} \approx11.12$

8 0

3 years ago

Which of these is a geometric sequence?

11Alexandr11 [23.1K]

Answer:

The correct answer is D

Step-by-step explanation:

7 0

4 years ago

Help solve for number 6 please !!<br> :)

Semenov [28]

Answer:

x: {-3, 5}

Step-by-step explanation:

Step 1. Find least common denominator

Step 2. Multiply missing factors on top AND bottom

Step 3. Combine like terms

Step 4. Simplify (get rid of denominator)

Step 5. Solve for x

$\frac{x}{x-5} +\frac{3}{x+2} =\frac{7x}{x^2-3x-10}$ LCD = $x^2-3x-10$ OR $(x-5)(x+2)$

$\frac{x}{x-5}(\frac{x+2}{x+2}) +\frac{3}{x+2}(\frac{x-5}{x-5}) =\frac{7x}{x^2-3x-10}$

$\frac{x(x+2)}{(x-5)(x+2)} +\frac{3(x-5)}{(x+2)(x-5)} =\frac{7x}{(x-5)(x+2)}$

$\frac{x(x+2)+3(x-5)}{(x-5)(x+2)} =\frac{7x}{(x-5)(x+2)}$

$\frac{x^2+2x+3x-15}{(x-5)(x+2)} =\frac{7x}{(x-5)(x+2)}$

$\frac{x^2+5x-15}{(x-5)(x+2)} =\frac{7x}{(x-5)(x+2)}$

$x^2+5x-15=7x$

$x^2-2x-15$

$(x-5)(x+3)$

8 0

3 years ago