Which equation is an identity?
1 answer:
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Answer:
<em>He should pack </em><em>9 loaves</em><em> of bread for a 12 day hiking trip if he eats the same amount of bread each day.</em>
Step-by-step explanation:
Hint- This can be solved by Unitary method.
Sam used 6 loaves of elf bread on an 8 day hiking trip.
or in an 8 days trip he used 6 loaves of bread,
so in 1 day he would use loaves of bread,
so in a trip of 12 days he would use loaves of bread.
Therefore, he should pack 9 loaves of bread for a 12 day hiking trip if he eats the same amount of bread each day.
We can put this information into two equations:
7 booklets = 140 stamps
3 booklets = 60 stamps
Let us then focus on one equation to find the relationship:
7 booklets = 140 stamps
If we put that into a fraction, we get
or 
.
This means that for every booklet, Ashley gets 20 stamps; or rather, each booklet has 20 stamps.
We can then see that this relationship holds true for the second equation as well:
or .
To write a general equation for this relationship using p for the number of postage stamps, and b for the number of booklets:
p = 20b
Where b is equal to p.
7 booklets = 140 stamps
3 booklets = 60 stamps
Let us then focus on one equation to find the relationship:
7 booklets = 140 stamps
If we put that into a fraction, we get
This means that for every booklet, Ashley gets 20 stamps; or rather, each booklet has 20 stamps.
We can then see that this relationship holds true for the second equation as well:
To write a general equation for this relationship using p for the number of postage stamps, and b for the number of booklets:
p = 20b
Where b is equal to p.