Equivalent expressions are expressions that have the same value.
The equivalent expression of
is: 
The expression is given as;

Apply law of indices to change the exponents

Express as products

Rewrite as

Hence, the equivalent expression is: 
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12 cm high is about 4.7 inches high
Dan started with 69 cards
Step-by-step explanation:
Let x be the initial number of cards
Then
According to "Dan bought 7 new baseball trading cards to add to his collection"

The next day his dog ate half of his collection.

There are now only 38 cards left.

Multiplying both sides by 2

Subtracting 7 from both sides

Hence,
Dan started with 69 cards
Keywords: Linear equation, word problems
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C because for every mile the cost increases be $4.75
270 / 3 ( (4 - 3) 3 - (-9) ) - 53
270 / 3 (1 x 3 - (-9) ) - 53
270 / 3 (3 + 9) - 53
270 / 3 x 12 - 53
In PEMDAS, with multiplication and division, you must go left to right, not multiplication then division.
90 x 12 - 53
1080 - 53
1027 is your answer