Answer:
7. Quadrilateral
8. Trapezoid
9. Quadrilateral
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Step-by-step explanation:
Answer:
-14 or -2
Step-by-step explanation:
-8+-6= -14
-8+6 = -2
Hiya. I'm going to rewrite the second equation.
By subtracting 5x by both sides, I'll be able to have y by itself:
-y=-5x+13
I'm going to then divide both sides by -1 to get:
y=5x-13.
Then, I'm going to plug that equation into the first equation
3x+2(5x-13)=39
Factor:
3x+10x-26=39
Combine like terms:
13x=65
Divide both sides by 13 to get x by itself to get x=5
Plug this back into the equation of y=5x-13
y=5(5)-13 to get y=12
The scale factor is 4 and for the perimeter just use the distance formula
(5*180)/7=900/7=128.5714285714286
The angle is approximately 129 degrees.
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