The roots of the quadratic equation 
are
.
Here the given quadratic equation is 
. Here 
.
The roots are
The measurement of fourth angle is: 130°
Further explanation:
Let A, B, C and D be the four angles.
m∠A=105°
m∠B=80°
m∠C=45°
We know that the sum of interior angles of a quadrilateral is 360°
So,
m∠A+m∠B+m∠C+m∠D=360°
105°+80°+45°+m∠D=360°
230°+m∠D=360°
m∠D=360°-230°
m∠D=130°
The measurement of fourth angle is: 130°
Keywords: Quadrilateral, Interior angles
Learn more about quadrilateral at:
#LearnwithBrainly
Answer:
.2
Step-by-step explanation:
If you multiply 2.5 x .2 you get .5 meaning .2 is the scale factor
usps is cheaper
Step-by-step explanation:
usps equals 6 dollars 85 cents and fedex charges 9 dollars and 10 cents
D because your making the shape smaller 2 times
