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Sliva [168]
3 years ago
9

There are 84 boys in a senior class of 146 students. find the ratio of boys to girls. (note: if you know the total number of stu

dent in the class and the number of boys, what do you need to do to find the number of girls?
Mathematics
1 answer:
vladimir1956 [14]3 years ago
4 0
84 to 62. You have to subtract 146-84 to get the number of girls from the class.
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The cost of purchasing a bag of rice is partly constant and partly varies inversely as the square root of the number of people d
algol [13]

Answer:

(a) 160 Naira

(b) Undefined

Step-by-step explanation:

Given

Let:

y \to cost of bag of rice

x \to people demanding the bag

So, we have:

y\ = \frac{k}{\sqrt x} + c ---- The variation

y = 100; x = 36

y = 150; x = 144

We have:

y\ = \frac{k}{\sqrt x} + c

When: y = 100; x = 36

100 = \frac{k}{\sqrt {36}} + c

100 = \frac{k}{6} + c -- (1)

When: y = 150; x = 144

150 = \frac{k}{\sqrt {144}} + c

150 = \frac{k}{12} + c--- (2)

Subtract (1) from (2)

150 - 100 = \frac{k}{12} - \frac{k}{6} + c - c

50 = \frac{k}{12} - \frac{k}{6}

Multiply through by 12

600 = k - 2k

600 = -k

k = -600

To solve for x, we have:

100 = \frac{k}{6} + c -- (1)

This gives:

100 = \frac{-600}{6} + c

100 = -100 + c

c = 100 + 100

c = 200

So, the equation is:

y\ = \frac{k}{\sqrt x} + c

y = -\frac{600}{\sqrt x} + 200

Solving (1): y; when x = 225

We have:

y = -\frac{600}{\sqrt x} + 200

y = -\frac{600}{\sqrt {225}} + 200

y = -\frac{600}{15} + 200

y = -40 + 200

y = 160

Solving (2): x; when x = 200

We have:

y = -\frac{600}{\sqrt x} + 200

200 = -\frac{600}{\sqrt x} + 200

Collect like terms

\frac{600}{\sqrt x} = 200 - 200

\frac{600}{\sqrt x} =0

Cross multiply

600 =0 * \sqrt x

600 =0

<em>x is undefined</em>

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Answer:

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Step-by-step explanation:

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Answer:   5( 2x+ 9y )

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If you buy a computer directly from the manufacturer for $3,159 and agree to repay 48 equal installments
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Answer: $68.81

Step-by-step explanation:

If I'm reading this correctly, All you need to do is divide 3,159 by 48 and get the answer of 68.81

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Answer:

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Reason:

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