Write the expression as a complex number in standard form. 20 + (-23 -8i) +7i
here are the answers that are an option

3 + 7i

-3 - i

-3 - 15i

3 + 15i

Aheated piece of metal cools according to the function c(x) = (.5)x ? 7, where x is measured in hours. a device is added that aids in cooling according to the function h(x) = ? x ? 2. what will be the temperature of the metal after two hours?

Solve for x -2.3(r - 1.2 ) = -9.66 enter you answer as decimal.

30 pts, will mark brainliestwhat is the period of the sinusoidal function? (picture 1)what is the minimum of the sinusoidal function? (picture2)what is the maximum of the sinusoidal function? (picture 3)