All categories

3 years ago

3(10 - x) = 21 30 - 21 30 - 3x = 21 - 3x - 3x -9 = X =

Mathematics

2 answers:

Olenka [21]3 years ago

8 0

Step-by-step explanation:

I am answering blanks left to right and top to bottom.

30 30

-9

-3 -3

x = 3

xxMikexx [17]3 years ago

3 0

Answer:

x=3

hope this answers is ok na

You might be interested in

If f(x) = 5x, what is rl (x)?<br><br><br> NEED HELP !!

velikii [3]

Answer:

the second one is your answer

7 0

3 years ago

What is 38.5 as a fraction in simplest form?

aivan3 [116]

38.5 is equal to 38 1/2
38*2+1= 77, so the fraction in its simplest form is 77/2

6 0

4 years ago

Read 2 more answers

Use the tangent identity to

Lunna [17]

Answer:

$tan(x)=\frac{44\sqrt{89}}{89}$

Step-by-step explanation:

tan is defined as: $tan(x)=\frac{opposite}{adjacent}$

sin is defined as: $sin(x)=\frac{opposite}{hypotenuse}$

cos is defined as: $cos(x)=\frac{adjacent}{hypotenuse}$

We can also define tan as: $tan(x)=\frac{sin(x)}{cos(x)}$

because plugging in the definitions of sin and cos in we get: $tan(x)=\frac{(\frac{opposite}{hypotenuse})}{(\frac{adjacent}{hypotenuse})}\\\\tan(x)=\frac{opposite}{hypotenuse}*\frac{hypotenuse}{adjacent}\\\\tan(x)=\frac{opposite}{adjacent}$

which you'll notice is the original definition of tan(x)

So using this definition of tan(x) we can use the givens sin(x) and cos(x) to find tan(x)

$sin(x)=\frac{44}{45}\\\\cos(x)=\frac{\sqrt{89}}{45}\\\\tan(x)=\frac{sin(x)}{cos(x)}$

plugging in sin(x) and cos(x) we get:

$tan(x)=\frac{\frac{44}{45}}{\frac{\sqrt{89}}{45}}\\\\tan(x)=\frac{44}{45}*\frac{45}{\sqrt{89}}\\\\tan(x)=\frac{44}{\sqrt{89}}$

We usually don't like square roots in the denominator, and from here we want to rationalize the denominator which we do by removing the square root from the denominator.

We can do this by multiplying the fraction by: $\frac{\sqrt{89}}{\sqrt{89}}$ which doesn't change the value of the fraction since it simplifies to 1, but it gets rid of the square root in the denominator