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Lilit [14]
3 years ago
6

Help me please thanks

Mathematics
2 answers:
Nadya [2.5K]3 years ago
8 0

Answer:  (D) all real numbers

<u>Step-by-step explanation:</u>

4(a + 3) = 12 + 4a

4a + 12 = 12 + 4a     <em>distributed 4 into a + 3</em>

       12 = 12             <em>subtracted 4a from both sides</em>

        TRUE

A true statement means they are the same equation so any value you plug in for "a" will make a true statement.  There are an infinite number of solutions.


<u>Examples:</u>

Let a = 0, then 4(0 + 3) = 12 + 4(0)

                         ⇒  4(3) = 12 + 0  

                         ⇒     12 = 12

Let a = 10, then 4(10 + 3) = 12 + 4(10)

                         ⇒  4(13) = 12 + 40  

                         ⇒     52 = 52

Let a = 100, then 4(100 + 3) = 12 + 4(100)

                         ⇒  4(103) = 12 + 400  

                         ⇒       412 = 412

Any number you choose, will make a true statement so the solution is "all real numbers".

Natalka [10]3 years ago
6 0

Answer: All real numbers

Step-by-step explanation: If you plug in any number, it will work. 4(a+3) = 12+4a. a=-3  0=0


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60 pounds

Step-by-step explanation:

To find the adult weight, multiply 12 by 5.

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12(5)

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Answer:

12

Step-by-step explanation:

1. Substitute each letter with the numbers given

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3 years ago
You are running a concession stand at a basketball game. You are selling hotdogs and sodas. Each hotdog cost $1.50 and each soda
Lubov Fominskaja [6]

Answer:

35 hotdogs

Step-by-step explanation:

You are running a concession stand at a basketball game. You are selling hotdogs and sodas.

Let the number of hot dogs be represented by x

The number of soda be represented by y

You sold a total of 87 hotdogs and sodas combined

x + y = 87

x = 87 - y

Each hotdog cost $1.50 and each soda cost $0.50. At the end of the night you made a total of $78.50.

Hence we have the equation:

$1.50 × x + $0.50 × y = $78.50

1.50x + 0.50y = 78.50

Substitute 87 - y for x

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Hence, you sold 35 hotdogs

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3 years ago
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