In 15 years lisa will be four times as old as she is now. how old is she now
1 answer:
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Answer:
To make 16 cookies you will need 1 cup of sugar.
Step-by-step explanation:
Given:
Sugar needed to make 20 cookies = 1 1/4 cups
To Find:
Sugar needed to make 16 cookies = ?
Solution:
For making 20 cookies 1 1/4 cups of sugar is used
So to make 1 cookie we need
=>
=>
=>
=>
=> cups of sugar
Now to make 16 cookies we need,
=>
=>
=>
=> 1
Answer:
The expression that shows how long the two machines will operate simultaneously is:
Step-by-step explanation:
We know that:
x: hours to manufacture a deck of cards for machine A
y: hours to manufacture a deck of cards for machine B
z: hours that machine A operates alone
The number of decks manufactured only by machine A is:
So, the remaining decks are given by:
Then, the combined rate of machines A and B would be:
The work-rate formula is:
Hence, the time that the two machines work simultaneously is: