Answer :
Final answer:
To find the cost of a hammer, we can set up an equation based on the given information. By solving the equation, we find that the cost of a hammer is $11.
Explanation:
To solve this problem, let's assume the cost of a hammer is x dollars. Since a drill costs $30 more than a hammer, its cost would be x + 30 dollars. Jack spends a total of $159 on two drills and seven hammers, so we can set up the equation:
2(x + 30) + 7x = 159
Simplifying the equation:
2x + 60 + 7x = 159
Combining like terms:
9x + 60 = 159
Subtracting 60 from both sides:
9x = 99
Dividing both sides by 9:
x = 11
Therefore, the cost of a hammer is $11.
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