Find the value of x of triangle ​

Given

=>An exterior Angle = 4x and 2 interior Angles (x-15° & 2x-25) opposite to the exterior Angle

To Find

=> x-15°+ 2x+25° = 4x

=> 3x+10° = 4x

=> 3x-4x = -10

=> x-15° = 10-15 => -5°

=>2x+25 = 20+25 = 45°

Also ,

45°-5° = 10 × 4

40° = 40°

Hence , Verified ✓

18.36. give me brainliest!

step-by-step explanation:

you have to multiply 1.53 by 12 so the equation is 12x1.53 and then that is your answer.

x= -3 and

step-by-step explanation:

to find the roots of a cubic, use division or factoring to find the factors then set equal to 0. as this is a difference of cubes, it factors into

where a is the cube root of .

here   this is 27 and the cube root of 27 is 3. so we write using the form:

.

set each factor to 0 and solve for x.

x-3=0

x=3

the quadratic expression does not factor and must be solved using the quadratic formula.

where a = 1, b=3, and c=9

this cubic has two complex roots.