Explain how the commutative property of addition,the Associative property of addition and mental math can help you find 75.2+(57
2 answers:
Answer: The sum of 75.2+(57.376+24.8) is 157.376.
Explanation:
The commutative property of addition states that,
The associative property of addition states that,
The given expression is 75.2+(57.376+24.8).
First use commutative property of addition in the parenthesis.
Now use associative property of addition.
Now simplify the expression,
Therefore, the sum of 75.2+(57.376+24.8) is 157.376.
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The question is incomplete. Here is the complete question:
Denise earns $30 an hour. She wants to purchase a computer that costs $2000. Create and solve an inequality to determine the least amount of hours she must work in order to be able to purchase the computer.
Answer:
Denise has to work at least 67 hours in order to buy a computer that costs $2000.
Step-by-step explanation:
Given:
Hourly earning of Denise is $30.
Let the number of hours Denise works be 'h'.
Now, total earning of Denise can be calculated using the unitary method and is given as:
Now, total money earned by Denise must be at least $2000 in order to purchase a computer. Therefore, the inequality is given as:
Therefore, Denise has to work at least 67 hours in order to buy a computer that costs $2000.