Any rational number that is -9 up (-10, -11, -12, etc.) is an integer less than -8
1. -4 times 3 and 21
2.add -12 and -84
3.-96 dived by 2
4 equals -48
In this complex number, assuming that the equation actually is <span>18- √-25</span>, the real part is already simplified. However, the imaginary part can be simplified by taking out "i" from the root using the relation i = <span>√-1. This is done below:
18 - </span><span>√-25
18 - </span>√(-1)(25)
18 - 5i
From the choices, the correct answer is 18 - 5i.
There are several ways to solve this, but the law of sines is probably the easiest...
Law of Sines: sina/A=sinb/B=sinc/C for any triangle...in this case we can say:
sin48/x=sin90/55
xsin90=55sin48
x=55sin48/sin90
x≈40.873 (to nearest one-thousandth, not sure which precision you needed)