Simplify the expression to a + bi form:
(-11 + 8i) - (9 + 5i)

-20 + 3i

Step-by-step explanation:

-11 + 8i -9 -5i

Combine like terms:

-20 +3i is your answer.

16 + 4i  

Explanation:

Remove the parentheses: 11+8i+5-4i

Combine like terms: 16+4i

Answer is 16+4i

x + y = 90 5x – 10y = 90 90 – 10y = 5x 90 + 10y = 5x

step-by-step explanation:

last month maria hiked the 5-mile mountain trail a number of times and she hiked the 10-mile canal trail several times. let x represent the number of times she hiked the 5-mile trail, and let y represent the number of times she hiked the 10-mile trail. if she hiked a total of 90 miles, which equation can be used to find the number of times maria hiked each trail? x + y = 90 5x – 10y = 90 90 – 10y = 5x 90 + 10y = 5x

v = 1/3 a^2h

step-by-step explanation:

if the height is 57.7cm and the height of the slant edge is 18.2cm, then the volume is 1/3 a^2h.