Hello,
x=5 cos t and y=5 sin t are the parametric equations of the circle of center (0,0) with radius=5
x²=25*cos²t
y²=25*sin²t
x²+y²=25(cos²t+sin²t)
==>x²+y²=25
Answer:
392
Step-by-step explanation:
40% of 980 = 0.4 × 980 = 392
Answer:
.0548
Step-by-step explanation:
(2-10)/5= -1.6
go to a ztable and get .0548
Answer:
Step-by-step explanation:
-2x² + 12x + 32 = 0
discriminant = 12² - 4(-2)(32) = 400
positive discriminant means there are two distinct real roots
x = [-12 ± √(12² – 4(-2)·32)] / [2·(-2)]
= [-12 ± √400] / (-4)
= [-12 ± 20] /(-4)
= 8, -2
X can be anything greater than 59 or x>59
