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Dafna1 [17]
4 years ago
9

Daniel's grandmother sent him $74.70 for his birthday. If Daniel spends $72.17 on a new video game, how much birthday money will

he have left?
Mathematics
1 answer:
tamaranim1 [39]4 years ago
7 0

<u>Answer:</u>

<u><em>$2.53 left</em></u>

<u><em /></u>

<u>Explanation:</u>

Since the question is asking us how much money Daniel has left, we must subtract the amount he spent on the video game by the original amount (the amount of money his grandmother sent him).

74.70-72.17= ?\\74.70-72.17= 2.53

So, based on our calculations, Daniel should have <em><u>$2.53 left.</u></em>

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Aliun [14]

Answer:

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Step-by-step explanation:

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This means (ab) actually has value of 10a+b.

We are given the sum of those digits of (ab) is 10; this means a+b=10.

It says if 18 is added to the number (ab), then the result is (ba).

So (ab) has value 10a+b and

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We are given then:

(ab)+18=(ba)

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b+18=10b+a-10a

Simplify:

b+18=10b-9a

Subtract b on both sides:

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18=9b-9a

Divide both sides by 9:

2=b-a

Rearrange by commutative property:

2=-a+b

So the system of equations we want to solve is:

a+b=10

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Divide both sides by 2:

b=\frac{12}{2}

Simplify:

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If b=6 and a+b=10, then a=4.  a=4 since 4+6=10.

So the original number is (46).

18 more than 46 is 18+46=(64) which is what we wanted.

We also have the sum of 4 and 6 is 10 as well.

7 0
4 years ago
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If the blocks were 9 different colors, then there would be

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But for each different line-up, there are 5! =120 ways to arrange
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the white blocks and you can't tell these apart, and 2!=2 ways to arrange
the orange blocks and you can't tell these apart.

So the number of distinct, recognizable ways to arrange all 9 blocks
is

         (9!) / (5! · 2! · 2!)  =  (362,880) / (120 · 2 · 2)  =  756 ways.
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3 years ago
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x = 11




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4 years ago
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