3 years ago

Can someone help me out? :)

Mathematics

1 answer:

aksik [14]3 years ago

8 0

Answer:

x = 5

Step-by-step explanation:

5 x's

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3 years ago

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3 years ago

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A bag contains counters that are red, black , or green . 1/3 of the counters are red 1/6 of the counters are black There are 15

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Answer:

There are 5 black counters in the bag.

Step-by-step explanation:

15 green counters in the bag

The proportion of green counters is given by:

$p = 1 - (\frac{1}{3} + \frac{1}{6}) = 1 - (\frac{2}{6}+\frac{1}{6}) = 1 - \frac{3}{6} = 1 - \frac{1}{2} = \frac{2}{2} - \frac{1}{2} = \frac{1}{2}$

So, we have that, the total is x. So

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How many black counters are in the bag ?

A sixth of the counters are black. So

$\frac{1}{6} \times 30 = \frac{30}{6} = 5$

There are 5 black counters in the bag.

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3 years ago

To calculate 4 1/5% tax on $63.78, multiply 4.2 times 63.78. True or False.

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$\bf {{ a}}\%\ of\ b \implies \cfrac{{{ a}}}{100}\cdot b\implies {{ a}}\div 100\cdot b\qquad thus\\\\
-----------------------------\\\\
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you tell us, what would you end up multiplying 63.78 there, to get the 4 1/5% of it?

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4 years ago

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