Step-by-step explanation:
Sally mass = 70 kilograms
Dave mass = 170 pounds ≈ 77 kilograms
Sally's mass as a percentage of Dave's mass = (70/77)x100
Sally's mass as a percentage of Dave's mass ≈ 91 %
When u got a + in the middle, parenthesis are not needed
3x^2 - 2 + 2x^2 - 6x + 3...now we combine like terms
5x^2 - 6x + 1 <==
Hi,
1) ax²+2bx+c=0 have real roots then (2b)²-4ac>=0 ==> 4b²>=4ac ==> b²>=ac
2) bx²-2√(ac)x+b=0 have real roots then
(-2√(ac))²-4b²>=0==> 4ac>=4b²==> ac>=b²
So b²>=ac>=b²==> b²=ac
I’m sorry I don’t see a diagram for this. Could you please scan one?