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pshichka [43]
2 years ago
6

A set of four postcards costs $1.00. Single postcards cost $0.50. What is the least amount of money you

Mathematics
2 answers:
Alex Ar [27]2 years ago
7 0
You would buy the set of four postcards 4 times. This would equal $4 for 12 postcards. Then you would have to buy 3 individual postcards. Those 3 postcards would be $1.50
$4+$1.50=$5.50
shepuryov [24]2 years ago
3 0

Answer: 3 Sets of the 4 post cards and 3 of the single post cart sets.

Step-by-step explanation:

You buy 3 of the 4 post card set becuase that is the most you can get of those to get under 15 post cards.

You would now have 12 postcards now you have to buy 3 of the single set to get to 15 cards

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2 years ago
The combined height of one fir tree and one pine tree is 212121 meters. The height of 444 fir trees stacked on top of each other
Drupady [299]

Answer:

Height of fir tree = 9 meters

height of pine tree= 12 meters

Step-by-step explanation:

The combined height of one fir tree and one pine tree is 21 meters. The height of 4 fir trees stacked on top of each other is 24 meters taller than one pine tree.

Let x be the height of fir tree and y be the height of pine tree

x+y=21

Subtract x from both sides

y=21-x

height of 4 fir trees = pine tree +24

4x=y+24

Substitute 21-x or y in the above equation

4x=21-x+24

Add x on both sides

5x=45

Divide by 5 on both sides

x=9

Now plug in 9 for x and find out y

y=21-x

y=21-9

y=12

Height of fir tree = 9 meters

height of pine tree= 12 meters

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3 years ago
What is the scale factor
stepladder [879]

Answer:

multiply 5 times 12 then divide by 2 which equals 30 then 15 times 36 divided by 2

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Name 3 decimals with a product that is about 40
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4 0
3 years ago
Read 2 more answers
I need help for this question
lyudmila [28]
Number8)4n+6-2n=2(n+3) 
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2(3b-4)=4b-11
6b-8=4b-11 collect the like terms
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answer
2b=-3 then divide both sides by 2
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3 years ago
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