3a should be 9/16.
3b should be 56.25%
Answer:
1. distributive
2. associative
Step-by-step explanation:
In the first one, they are distributing 16 + 23 by the 4.
Therefore it is distributive property as they are splitting and then separately multiplying.
In the second one, the parentheses are shifted. The shifting of parentheses indicates priority, and the associative property says in addition you can choose what you'd like to do first and it won't change the answer.
Answer:
The job will take <u><em>75 minutes</em></u> if the Hewlett Packard copier is broken
Step-by-step explanation:
In this question, we are tasked with calculating the amount of time it will the Xerox copier to finish making the copies whilst working alone
First, let the number of copies to make be x
Thus, the rate at which both copiers deliver when working together is x/30 copies per minute
If the Hewlett Packard is working alone, its rate is x/50 copies per minute
Let the time taken for the Xerox copier to complete its work be y minutes. Its working rate is thus x/y copies per minute
When we add the individual working rates, we have the joint working rate.
Hence, mathematically;
x/50 + x/y = x/30
Multiply through by 1/x
1/50 + 1/y = 1/30
1/y = 1/30 - 1/50
1/y = (50-30)/1500
1/y = 20/1500
20y = 1500
y = 1500/20
y = 75 minutes
Thus, the job will take 75 minutes if the Hewlett Packard copier is broken
