Answer:He is wearing a coat and the temperature is below 30°F.
Step-by-step explanation:
i)
Pythagorean's theorem: √50
j)
Pythagorean's theorem: √1/2
Square Perimetre = Side x 4
So a length of a square ground is 160/4 = 40 (m)
Answer:
check the picture
Step-by-step explanation:
I hope you get it
the discriminant b^2 - 4ac when the equation is in the form of ax^2 +bx+c=0
13x^2-16x = x^2 -x
we need to get in it the standard form
subtract x^2 from each side
12x^2 -16x = -x
add x to each side
12x^2 -15x = 0
12x^2 -15x -0 =0
a=12 b=-15 c=0
b^2 -4ac
the discriminant = b^2
b^2 = (-15)2 = 225