Computers in some vehicles calculate various quantities related to performance. One of these is the fuel efficiency, or gas mile
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Let's say the quantities are "a" and "b"
so... whatever "a" and "b" are, they add up to 9,500, thus
a + b = 9,500
now, "a" was invested at 12%, or 12/100
it yielded some amount, actually 12% of a, or 12/100 * a or 0.12a
the "b" amount was invested at 9%, or 9/100
it yielded 9% of b, or 9/100 * b or 0.09b
whatever 0.12a is, and 0.09b is, their sum or total yield was 1032
thus
0.12a + 0.09b = 1032
thus
solve for "a" to see how much was invested at 12%
what about "b"? well, b = 9500 - a
so... whatever "a" and "b" are, they add up to 9,500, thus
a + b = 9,500
now, "a" was invested at 12%, or 12/100
it yielded some amount, actually 12% of a, or 12/100 * a or 0.12a
the "b" amount was invested at 9%, or 9/100
it yielded 9% of b, or 9/100 * b or 0.09b
whatever 0.12a is, and 0.09b is, their sum or total yield was 1032
thus
0.12a + 0.09b = 1032
thus
solve for "a" to see how much was invested at 12%
what about "b"? well, b = 9500 - a
1. Each shelf holds 5 hermit-crab cages. There are 23 hermit crab cages to be displayed. Divide the number of hermit crab cages to be displayed by the number of hermit crab cages that can be displayed on each shelf:
This means that you need 5 shelves (4 shelves is not enough, because 3 hermit crab cages will be not displayed).
2. Each shelf holds 3 hermit-crab care booklets. There are 12 hermit-crab care booklets to be displayed. Divide the number of hermit-crab care booklets to be displayed by the number of hermit-crab care booklets that can be displayed on each shelf:
This means that you need 4 shelves.
Answer: first, you have to divide 23 by 5 and find the quotient and remainder and divide 12 by 3 and find the quotient and remainder. Then you have to determine the number of shelves needed. You need 5 shelves.