K =80
40 x 2 = 80 so 80 \ 2 = 40
Answer:
12 and 9
Step-by-step explanation:
x=larger number y=smaller number
x+y=21
x=2y-6 (system of equations)
x=21-y
2y-6=21-y
3y=27
y=9
x+9=21
x=12
Answer:
Step-by-step explanation:
we have
we know that
The formula to solve a quadratic equation of the form
is equal to
in this problem we have
so
substitute in the formula
therefore
StartFraction 19 minus StartRoot 365 EndRoot Over 2 EndFraction comma StartFraction 19 + StartRoot 365 EndRoot Over 2 EndFraction
Answer:
x=9 x=-5
Step-by-step explanation:
x² − 4x + 4 = 49
(x-2)²= 49
x-2= 7 or x-2=-7
x=9 or x=-5
You will get 18 when you multiply them