Idesperately need with this. will give brainliest for questions 7-12, let z1 = 3(cos(60°) + isin(60° z2 = 2(cos(35°) + isin(35° and z3 = 4(cos(45°) + isin(45° calculate the following, keeping your answer in polar form. 6. z1 + z2 7. z3 – z2 8. z2z3 10. z1 / z3 11. z1 / (z2z3)

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.

answer: yard ramps with a level off platform are typically 36 feet long. truck, rather than at an angle, enabling access to those pallets at the very back of the truck. if you are using your yard ramp to convert a loading dock into a drive-in door, we even at 60 inches (5 feet) high and a 30 foot ramp, the slope of the ramp will be less

step-by-step explanation: