$\frac{\sqrt{-49}}{(7-2i)-(4+9i)}=\\
\frac{\sqrt{-1*7*7}}{3-11i}=\\
\frac{7i}{3-11i}*\frac{3+11i}{3+11i}=\\
\frac{(7i)*(3+11i)}{3^2-(11i)^2}=\\
\frac{21i+77i^2}{9+121}=\\
\frac{21i-77}{130}=\\
\frac{-77+21i}{130}$

so it is the last option

6 0

4 years ago

A doghouse is to be built in the shape of a right trapezoid, as shown below. What is the area of the doghouse? top is 7 side 7 b

Ann [662]

I believe the answer is 45.5 square feet

8 0

3 years ago

Please hurry, Find the sum of the first 10 terms in the series:

Mariana [72]

Answer:

44,286

Step-by-step explanation:

The rule is multiplying by -3.

The sequence goes -3, 9, -27, 81, -243, 729, -2187, 6561, -19683, 59049

Add all of those up and you get 44,286

6 0

3 years ago

Read 2 more answers