Answer:
2/3
Step-by-step explanation:
1/6 + 1/2
The common denominator is 6
1/2 *3/3 = 3/6
1/6 +1/2
1/6 +3/6
4/6
Divide the top and bottom by 2
2/3
The scientific notation of this number would be 81500000e-1
Answer:
a. -2x^2 + 3x+5=y
b.-x^2 +5x-4=y
c.-x^2 +6x-12=y
Step-by-step explanation:
a.y=-2x^2 +bx+c
the points P and Q lie on curve
=> b=3, c=5
b. delta = b^2 +4c
x1= =4
=> =8
x2==1
=>2=b+
suppose : = a
=>
=> a=-3
b=5
a=-3 => =-3 => b^2 +4c =9 =>5^2 +4c=9 => c=-4.
c.vertex (3;-3)
=3 => b =6
= =-3 =>-b^2+4ac=12 => c=-12.
I'll solve for y
xy+(4(20))>x-5y(2+9-7)
xy+4(20)>x-5y(2+9-7)
xy+4(20)>x-5y(4)
xy+4(20)>x-20y
xy+80>x-20y
xy+20y+80>x
y(x+20)>-80+x
y>(-80+x)/(x+20)