It's 48/200=0.24$ per a bead
She will have to pay 0.24*25=6$
Answer:
<em>options: A,C,E </em>are correct.
Step-by-step explanation:
We have to find the expression equivalent to the expression:
![\dfrac{21^x}{3^x}](https://tex.z-dn.net/?f=%5Cdfrac%7B21%5Ex%7D%7B3%5Ex%7D)
we know that: ![21^x=(3\times7)^x\\\\21^x=3^x\times7^x](https://tex.z-dn.net/?f=21%5Ex%3D%283%5Ctimes7%29%5Ex%5C%5C%5C%5C21%5Ex%3D3%5Ex%5Ctimes7%5Ex)
Hence,
-----(1)
A)
(same as(1))
Hence, option A is correct.
B) 7 ; which is a different expression from (1)
Option B is incorrect.
C)
(Same as (1))
Option C is correct.
D)
which is a different expression from (1)
Hence, option D is incorrect.
E)
; which is same as (1)
Hence, Option E is correct.
F)
; which is not same as expression (1)
Hence, option F is incorrect.
Answer:
Step-by-step explanation:
a³-b³=(a-b)(a²+ab+b²)
6³-1=6³-1³=(6-1)(6²+6*1+1²)=5×43
so 6³-1 is divisible by 5.
Just substitute the value x into the equation y=2x
y = 2x
y = 2(-1)
y = -2
use the same method for the rest