Which expression is equivalent to (7x^2)(3x^-4) A. 21X ^-8
B. 21X^2
C. 21X^-6
D. 21X ^-2

the answer is b

Step-by-step explanation:

heres why:

(7x^2)(3x^-4)

7x3=21x

21/x^4

21/x²

4 + 5 7/9= 9 7/9

step-by-step explanation:

answer:   35 % is the probability of a late departure or an early arrival.

step-by-step explanation:

let l represents the late departure and e represents the early departure.

then, according to the question,

p(l) = 12 %,   p(e) = 27 % and = 4 %

and, we have to find out,

but, we know that,

which is the required equation that will use to find the probability of a late departure or an early departure.

therefore,   the probability of a late departure or an early arrival =   35 %