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BARSIC [14]
3 years ago
12

At the local pet store, zebra fish cost $1.80 each and neon tetras cost $2.10 each. If Ernesto bought 16 fish for a total cost o

f $30.90, not including tax, how many of each type of fish did he buy? Help ASAP!!
Mathematics
1 answer:
madreJ [45]3 years ago
3 0
<span>zebra fish a then tetras fish (11 – a)
2.2a + 1.85(11 – a) = 22.80
2.2a + 20.35 – 1.85a = 22.80
0.35a = 2.45
a = 7 zebra and 11 – 7 = 4 neon fish

</span>
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Answer:

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Step-by-step explanation:

We need to find the product of 3a^2.2a^3\\

Using the exponent rule: a^m. a^n = a^{m*n}

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3 years ago
Solve using the box method
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3 years ago
if the value of x varies directly as the value of y , and x = 16 when y = 3/4 , what is the value of x when y = 3/8 ?
Olin [163]

Answer:

x=8

Step-by-step explanation:

If the value of x varies directly as the value of y we can say they are directly proportional. This implies that when y increases x will increase too, and when y decreases x will also decrease.

If x=16 when y=3/4 we can write their relation as:

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So, for every value of y, the ratio x/y must maintain equal to 64/3 because both values are proportional.

Now we can see what happens to x when y varies. If y=3/8:

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3 years ago
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andreyandreev [35.5K]

Answer:

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Step-by-step explanation:

7 0
3 years ago
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