7.8=rational because rational numbers are numbers that can be in a fraction decimal whole etc.
The answer is 7/10 the common demontior is 10 so the numbers change to 2/10 + 5/10 witch equals 7/10
<u><em>45×60=2700</em></u>
<u><em>And to check divide </em></u>
<u><em>2700÷60=40</em></u>
<u><em>2700÷40=60</em></u>
<u><em>Have a great time miss!</em></u>
<h3>Answer:</h3>
8 -2i
<h3>Explanation:</h3>
For purposes of addition and subtraction, "i" can be treated in the same way any variable would be. Like terms are added in the usual way.
... (5 -4i) + (3 +2i) = (5 +3) +(-4 +2)i = 8 -2i
Their total score is 8 - 2i.