Step-by-step explanation:
7
x - (k+2)x + 4
Since the roots are equal, b^2 - 4ac =0
a =x, b=k+2, c =4
(k+2)^2 - 4(1×4) =0
K^2 + 4k + 4-16 =0
K^2 +4k - 12=0
K^2 +6k - 2k - 12 =0
K(k + 6) - 2(k +6)=0
(k-2)(k +6) =0
K =2 or - 6
Answer:
HI ,,,,,
I AM THERE?....
y = 3·2^x
At x=0, f(0) = a = 3
At x=1, f(1) = a·b = 3b = 6 ⇒ b = 6/3 = 2
So, the function is ...
f(x) = 3·2^x
12 Dollars An Hour
51/4.25= 12
the rate is about $2.00
12.25 ÷ 5 = 2.45
21 ÷ 12 = 1.75
