Describe the transformation that takes f(x) =|x| to g(x)= -|x+4| -1

Translation 4 units to left, reflection about x-axis and then translation 1 unit up.

Step-by-step explanation:

We are given the applying some transformations to f(x) = |x| gives g(x) = -|x+4|+1.

Now, at the start f(x) is translated 4 units to the left i.e. f(x) is shifted 4 units to the left.

This gives us the new function as |x+4|.

Now, this new function is reflected about x-axis i.e. it is flipped across x-axis.

So, we get the new function - |x+4|.

Finally, we can see that - |x+4| is translated 1 units upwards i.e. it is shifted 1 unit up.

This gives us the required function g(x) = - |x+4| + 1 as shown below.

a) 7x=7

step-by-step explanation:

the value of x is 9 ⇒ answer b

step-by-step explanation:

* we can solve this problem using cosine and sine rule

- in δ abc

∵ ab = 36 , bc = 28 , ac = 16

- lets find the measure of angle b using the cosine rule

∵ cos b = [ab² + bc² - ac²]/2(ab)(bc)

∴ cos b = [36² + 28² - 16²]/2(36)(28)

∴ cos b = 19/21

∴ m∠b = cos^-1(19/21) ≅ 25°

- lets find the measure of angle a using the sine rule

∵ sina/bc = sinb/ac = sinc/ab

∴ sina/28 = sin25°/16 ⇒ by using cross multiplication

∴ sina = 28 × sin25°/16

∴ sina = 0.7396

∴ m∠a = sin^-1(0.7396) ≅ 48°

- from the figure m∠abd = m∠dbc

∵ m∠abc = 25°

∴ m∠abd = 25°/2 = 12.5°

- in δabd

∵ m∠a = 48° , m∠abd = 12.5°

∵ the sum of the measures of the interior angles of any δ is 180°

∴ m∠adb = 180° - (48° + 12.5°) = 119.5°

∵ ab = 36

∵ ad = x

- use the sine rule to find x

∵ sin∠adb/ab = sin∠abd/x

∴ sin119.5°/36 = sin12.5°/x ⇒ by using cross multiplication

∴ x = 36 × sin12.5°/sin119.5° = 8.95 ≅ 9

* the value of x is 9