Answer:
Step-by-step explanation:
x² + 6x = 8
Coefficient of the x term: 6
Divide it in half: 3
Square it: 3²
Add 3² to both sides of the equation to complete the square and keep the equation balanced:
x² + 6x + 3² = 8 + 3²
(x+3)² = 17
23=−7−5x
23=−5x−7
−5x−7=23
−5x−7+7=23+7
−5x=30
(−5x/−5)=(30/−5)
x=−6
the answer is DBC=90°
because the midpoint of the perimeter of quadrilateral is B
The 8th graders sold 180 more tickets
