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-BARSIC- [3]
3 years ago
10

Landon bought a trey of plants for 8.15 there were 16 plants in the tray if she only bought one plant about how much would it co

st
Mathematics
1 answer:
jek_recluse [69]3 years ago
7 0
8.15 divided by 16 = .51 each (rounded up to the nearest cent)
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3 years ago
A quantity b varies jointly with c and d and inversely with eWhen b is 18, c is 4, d is 9, and e is 6What is the constant of var
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Answer:

constant of variation = 3

Step-by-step explanation:

we know that b varies jointly with c and d

so:

b∝c∝d

and b varies inversely with e, so

b∝\frac{1}{e}

and i will call the constant of variation k, this way we can make an equation for b in the following form:

b=k\frac{cd}{e}

this satisfy that b varies jointly with c and d (if b increases, c and d also increase) and inversely with e (if b increases, e decreases)

we know that when b is 18, c is 4, d is 9, and e is 6:

b=18\\c=4\\d=9\\e=6

substituting this in our equation for b:

b=k\frac{cd}{e}\\ 18=k\frac{(4)(9)}{6}

and we solve operations and clear for the constant of variation k:

18=k\frac{36}{6}\\ 18=6k\\\frac{18}{6}=k\\ 3=k

the constant of variation is 3.

4 0
3 years ago
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a student earned a grade of 80% on a math test that had 25 problems. how many problems on this test did the student answer corre
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80% of 25
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80% of 25 means
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answer is 20 problems
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15/8 + 1/4

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Answer:

19

Step-by-step explanation:

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3 years ago
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