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Fed [463]
3 years ago
7

If you are starting with what you know about a large population and coming to a conclusion about a specific scenario, then which

type of reasoning are you using?
Mathematics
1 answer:
Ostrovityanka [42]3 years ago
4 0

Answer:

Education –> Mortality –> Fertility rates

Education –> Fertility rates

Step-by-step explanation:

Education and fertility is a key role to grow a large population. But if the mortality rate is low families tend to have less children.

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The hardcover version of a book weighs 7 ounces while its paperback version weighs 5 ounces. Forty-five copies of the book weigh
konstantin123 [22]

Answer:

33 copies were paperback and 12 were hardcover.

Step-by-step explanation:

Let h represent the number of hardcover copies and p represent the number of paperback copies.

We know that the total number of copies was 45; this gives us the equation

h+p = 45

We know that each hardcover copy is 7 ounces; this gives us the expression 7h.

We also know that each paperback copy is 5 ounces; this gives us the expression 5p.

We know that the total weight was 249 ounces; this gives us the equation

7h+5p = 249

Together we have the system

\left \{ {{h+p=45} \atop {7h+5p=249}} \right.

We will use elimination to solve this.  First we will make the coefficients of the variable p the same; to do this, we will multiply the top equation by 5:

\left \{ {{5(h+p=45)} \atop {7h+5p=249}} \right. \\\\\left \{ {{5h+5p=225} \atop {7h+5p=249}} \right.

To eliminate p, we will subtract the equations:

\left \{ {{5h+5p=225} \atop {-(7h+5p=249)}} \right. \\\\-2h=-24

Divide both sides by -2:

-2h/-2 = -24/-2

h = 12

There were 12 hardcover copies sold.

Substitute this into our first equation:

12+p=45

Subtract 12 from each side:

12+p-12 = 45-12

p = 33

There were 33 paperback copies sold.

3 0
3 years ago
Read 2 more answers
52:44
bagirrra123 [75]

Answer:

1          

Step-by-step explanation:

8 0
3 years ago
I think i had thw correct answers for thr last two but the keep coming up as incorrect​
Oksana_A [137]

Answer:

B. 40

C. 8

Step-by-step explanation:

7 0
2 years ago
Estimate 15% tip on a dinner bill of $59.12 dollars by rounding the first bill amount to the nearest
Serga [27]

Answer:

tenth

Step-by-step explanation:

8 0
3 years ago
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Help me please if i get less than an 80 i will not be able to do anything and will get grounded
Arisa [49]

Answer:

umm help with what

Step-by-step explanation:

8 0
2 years ago
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