Answer:
Step-by-step explanation:
(x +y)² = x² + 2xy +y²
-5(x + 3)² = -80
-5(x² + 2*x*3 + 3²) = -80
-5(x² + 6x + 9) = -80
Divide the equation by (-5)
x² + 6x +9 = -80/-5
x² + 6x + 9 = 16
x² + 6x + 9 - 16 = 0
x² + 6x - 7 = 0
x² - x + 7x - 7 = 0
x(x - 1) + 7(x - 1) = 0
(x - 1)(x + 7) = 0
x -1 = 0 ; x + 7 = 0
x = 1 ; x = -7
Answer:
m(arc)PM = 139°
Step-by-step explanation:
m<N = (1/2)[m(arc)PM - m(arc)OM]
59 = (1/2)[m(arc)PM - 21]
118 = m(arc)PM - 21
m(arc)PM = 139°
Answer:
200
Step-by-step explanation:
170% of x = 680
Set up an equation:
170/100 • x/1 = 680
1.7 • x = 680
1.7x = 680
x = 400
50% of 400
1/2 • 400 = 200
B......……...................
Step-by-step explanation:
two answers either
x = 8
or
x = -1