Money left after buying computer
= 1000-799
= $201
Number of 8-MB chips $201 can buy
= $201/25
= 8 chips.
Total memory upgrade
= 8*8Mb
= 64 Mb.
Note: assumes no tax payable
Last year's computer model is on sale for $799. You can add more memory to the computer. Each chip of 8 megabytes of memory costs $25. How many megabytes of memory can you add if you have at most $1,000 to spend.
2 answers
AT MOST signifies that you must write and inequality to solve this problem. AT MOST signifies to write the symbol "less than or equal to". <
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First write down what you know:
- You will spend $1,000 at most
- The computer's initial cost is $799
- Each chip contains 8 megabytes (MB)
- Each chips costs $25
- $1,000 - $799 will give you how much money you will have left over
Now let's solve:
Let x represent the amount of megabytes you can add
$1,000 - $799 (gives you the amount of money you have left over to buy extra memory) = $201
$201/$25 (gives you the number of chips you can buy) = 8
8(8) (gives you the number of megabytes you can buy - the answer!! ;D) = 64
The inequality with steps:
1,000 - 799
8( -------------- ) < x
25 ---
201
8( -------------- ) < x
25 ---
8(8) < x
---
64 < x
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First write down what you know:
- You will spend $1,000 at most
- The computer's initial cost is $799
- Each chip contains 8 megabytes (MB)
- Each chips costs $25
- $1,000 - $799 will give you how much money you will have left over
Now let's solve:
Let x represent the amount of megabytes you can add
$1,000 - $799 (gives you the amount of money you have left over to buy extra memory) = $201
$201/$25 (gives you the number of chips you can buy) = 8
8(8) (gives you the number of megabytes you can buy - the answer!! ;D) = 64
The inequality with steps:
1,000 - 799
8( -------------- ) < x
25 ---
201
8( -------------- ) < x
25 ---
8(8) < x
---
64 < x
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