What is the square root of negative sixteen plus the square root of forty nine written as a complex number in the form a + bi? A. 7 + 4i
B. 4 + 7i
C. 7 - 4i
D. -4 + 7i

A. 7 + 4i

I hope this helps.

Which pair of angles are vertical angles? ∠1 and ∠4∠1 and ∠2∠2 and ∠4∠2 and ∠3more than one answer.

Arefrigeration system at your company uses temperature sensors fixed to read celsius (°c) values, but the system operators in your control room understand only the fahrenheit scale. you have been asked to make a fahrenheit (°f) label for the high temperature alarm, which is set to ring whenever the system temperature rises above –10°c. what fahrenheit value should you write on the label?

Can someone, me with this.i really need with this