Answer:
120 minutes or 2 hours
Step-by-step explanation:
1/2 x 3 = 1 1/2
40 x 3 = 120 or 2 hours
The numbers are "x" and "y"
Therefore, we can suggest this system of equations:
x+y=10 ⇒x=10-y
xy=-60
Solve this system of equations by substitution method.
(10-y)y=-60
10y-y²=-60
y²-10y-60=0
Solve this square equation:
y=[10⁺₋√(100+240)]/2=(10⁺₋2√85)/2=5⁺₋√85
We have two solutions:
y₁=5-√85 ⇒x₁=10-(5-√85)=5+√85
y₂=5+√85 ⇒x₂=10-(5+√85)=5-√85
Answer: the numbers are (5-√85) and (5+√85)
its 10 points
c and d cause each Px = 4 for c and 10 for d.
A number can either be composite or prime. The only prime number that you listed here is 2, because the only factors of 2 are 1 and itself.