The number you have given parts for is written
2-4i. to get the complex conjugate just change the sign in the middle. in this case it's 2+4i
The two angles are obtuse which is greater then 90 degrees or acute which is less then 90 degrees.
Answer:
45.7 s
Step-by-step explanation:
Darya:
Number of laps = 13
Average time per lap = 23.5 seconds
Total time to swim 13 laps = Number of laps × Average time per lap
= 13 × 23.5
= 305.5 seconds
Kana:
Number of laps = 10
Average time per lap = 25.98 seconds
Total time to swim 10 laps = Number of laps × Average time per lap
= 10 × 25.98
= 259.8 seconds
It took longer for Darya to swim
13 laps than for Kana to swim 10 laps.
How much longer?
= 305.5 seconds - 259.8 seconds
= 45.7 seconds
This is a weird one. I'm going to work it, but I also want you to look back at the
book or the worksheet and make sure that you copied it correctly.
Because it's weird, I tell you.
| y + 9 | > 4
Subtract 9 from each side of the inequality:
<em> | y | > -5</em>
OK. Now, here we go:
'Absolute value' means just the size of the number, no matter whether it's
negative or positive. <em>So the absolute value of every number is positive</em>.
Got that ? <em>The absolute value of every number is positive</em>.
So <u>EVERY</u> number is a solution to this inequality. It doesn't matter what number
' y ' is, its absolute value is always positive. And if the absolute value is always
positive, then it's definitely always greater than -5 .
Weird ? I told you so.
