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Mice21 [21]
2 years ago
6

After losing 3 baseball cards, Peter gave half of his remaining cards to Bobby. If Peter gave Bobby 9 baseball cards, how many c

ards did Peter start with?
Linear equation:  1 2 (x - 3) = 9

Bobby claims that Peter started with 21 cards. Which statements are true about verifying Bobby’s claim? Check all that apply.
Mathematics
2 answers:
seropon [69]2 years ago
6 0
If Bobby claims Peter started with 21 cards, then we'll work this into our equation.

21 - 3 (that he lost) = 18
18 / 2 (the half he gave) = 9

So this means that he did have 21 cards to begin with. Please reply to this with a list of the answers that can/could be checked!
givi [52]2 years ago
3 0

The answers are A, C, and D

A.) Substitute 21 for x in the original equation.

C.) Bobby’s claim that x = 21 is correct.

D.) The result of verifying Bobby’s work is 9 = 9.

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Step-by-step explanation:

There is a rectangular prism boiler room. 112 square feet is the floor area of the room.

Let the length of the room is L feet and width is W feet.

So, LW = 112 ...... (1)

Now, given that L = 2 + 2W ........ (2) , hence, from equation (1) we get  

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Hence, from equation (2) we get L = 2W + 2 = 16 feet.

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Hence, H = 7 + 1 = 8 feet.

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