Melody

(3+4i)-(-5+2i)

=(3+4i)-1(-5+2i)

=3+4i+5-2i

=2i+8

just multiply all the numbers together.  

You always give excellent answers saseflower :)

I 'cheated' a bit because I ran off and graphed it.

Here is the graph.

33% is a tiny bit less than a third

A third of 46 = a tiny bit more than 15

15 is close enough

$${\frac{{\mathtt{4}}}{{\mathtt{410}}}} = {\frac{{\mathtt{2}}}{{\mathtt{205}}}} = {\mathtt{0.009\: \!756\: \!097\: \!560\: \!975\: \!6}}$$

$$\\ tan^2(4pi/3)- Sec^2(-11pi/6)\\\\
=tan^2(pi/3)- Sec^2(pi/6)\\\\
=(\sqrt3)^2-(\frac{2}{\sqrt3})^2\\\\
=3-\frac{4}{3}\\\\
=\frac{9-4}{3}\\\\
=\frac{5}{3}\\\\$$

HAPPY 7 - you need to rethink this answer!

He only reads 5 pages in 1 hour - so it is  200/5 hours

397/60  hours = $$6.61\dot6$$  hours

Happy you were not asked for hours and minutes.  You were just asked for hours.

You have it the wrong way around DDS

It has to multiply to -2 and add to 15.

There are no rational number that fit this description.