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NemiM [27]
3 years ago
6

Please help please please

Mathematics
1 answer:
Alenkasestr [34]3 years ago
5 0
Im pretty sure its 120
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Which expressions are equivalent to the one below? Check all that apply. 21^x/3^x
satela [25.4K]

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}

we know that: 21^x=(3\times7)^x\\\\21^x=3^x\times7^x

Hence,

\dfrac{21^x}{3^x}=\dfrac{3^x\times7^x}{3^x}=7^x-----(1)

A)   (\dfrac{21}{3})^x= 7^x  (same as(1))

Hence, option A is correct.

B)  7 ; which is a different expression from (1)

Option B is incorrect.

C) 7^x   (Same as (1))

Option C is correct.

D) (21-3)^x=18^x   which is a different expression from (1)

Hence, option D is incorrect.

E) \dfrac{7^x\times3^x}{3^x}=7^x   ; which is same as (1)

Hence, Option E is correct.

F) 3^x  ; which is not same as expression (1)

Hence, option F is incorrect.

5 0
4 years ago
Read 2 more answers
Sumalee bought seven Anjou pears for<br> $5.50. How many pears can Stefan buy if<br> he has $22?
Alex17521 [72]

Answer:

4

Step-by-step explanation:

22 ÷ 5.50 = 4

Hope this helps!

5 0
2 years ago
Can someone help me with this problem
expeople1 [14]
Increasing
Increasing
Decreasing
t=3
t=14
V=4
7 0
3 years ago
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How much money should be invested now (rounded to the nearest cent), called the initial investment, in a Treasury Bond investmen
Gre4nikov [31]
8519.54 should be the right answer
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3 years ago
A club charges $40 for membership fee and $3/hour for using it. If he used the club for 60 hours what is the total cost.
Arlecino [84]
Total cost is 220 dollars. This is because 3 times 60 is 180 and plus membership fee of 40 dollars is 220 dollars.
7 0
3 years ago
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