Find a negative real number such that the square of the sum of a number and 5 is equal to 48

Let x = negative real number  ⇒x<0

from the statement above, we can generate an equation: 
(x + 5)² = 48
=  
⇒ eliminate the square by getting the square root on both sides


⇒ the perfect square of a real number has one positive real number and a negative real number

transposing 5 to other side, we will arrive at two (2) values for x:

= -5 - 4√3    = -11.928
= -5 + 4√3   =  1.928

Since we are only looking at the negative real number, our answer will be -11.928, also equal to -5 - 4√3.

1. 5/82.95% is better than 7/8

This polygon has 4 sides
180(4-2) = 180(2) = 360 degree
80+90+2x + 3x = 360
170+5x = 360
5x = 190
x= 38
measure of angle t is 2(38)= 76
the answer is c. trust me
hope this !