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Angle 1 and Angle 5

Step-by-step explanation:

If angles are complementary, they add up to 90 degrees...

Angles 1, 5, and 6 add up to 180 degrees, as they are on a line. We know that Angle 6 is a right angle, meaning it is 90 degrees, which means...

Angle 1 + Angle 5 + 90 = 180

Subtract 90 from both sides

Angle 1 + Angle 5 = 90

Therefore they are complementary

Why the others are wrong

Angle 3 and Angle 5 : Angle 3 is already 90 degrees, so it cannot have a complement

Angle 3 and Angle 1 : Angle 3 is already 90 degrees, so it cannot have a complement (same as above)

Angle 4 and Angle 6: Angle 6 is already 90 degrees, so it cannot have a complement

if a = 1,   and b = 2, then the answer is 47.99999999. if you round that to the nearest whole number, the answer is 48.

solution:

the given function is ,

      =

the three roots of this quadratic function is , 0 ,8 and 10.all the roots are real and rational.

if a quadratic equation is of the form ,

sum of the roots = a + b +c= 0+8+10=18=  

product of roots taken two at a time = a b + b c+ c a = 0+80+0=80 =  

product of roots = a b c = 0=  

there are 11 doors in a hall starting from 0 to 11.the entry in the hall is permitted through gate number 0 and exit is allowed through only gate number 8 and 10.so, three roots(0,8,10) of quadratic function is given by entry and exit route of this hall.