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2 years ago

1 Activity

Mathematics

1 answer:

Alexxx [7]2 years ago

7 0

Answer: See explanation

Step-by-step explanation:

Let the price of apples be represented by a

Let the price of guyabanos be represented by g.

Since Marcel buys 5-star apples for PhP5.00 each and 3 guyabanos for PhP32.50 each. This will be:

C = 5a + 3g

where

a = PhP5.00

g = PhP32.50

c = Total cost

Therefore, an expression for the total cost of the fruits she buys will be:

C = 5a + 3g

C = 5(5.00) + 3(32.50)

The equation for the amount of change the cashier should give her if she gives the cashier PhP200.00 will be:

= 200.00 - 5(5.00) + 3(32.50)

= 200.00 - (25.00 + 97.50)

= 200.00 - 122.50

= Php77.50

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2 years ago

Questions (no partial grades if you don't show your work) 1. In a group of 6 boys and 4 girls, four children are to be selected.

mariarad [96]

Answer:

Total number of ways will be 209

Step-by-step explanation:

There are 6 boys and 4 girls in a group and 4 children are to be selected.

We have to find the number of ways that 4 children can be selected if at least one boy must be in the group of 4.

So the groups can be arranged as

(1 Boy + 3 girls), (2 Boy + 2 girls), (3 Boys + 1 girl), (4 boys)

Now we will find the combinations in which these arrangements can be done.

1 Boy and 3 girls = $^{6}C_{1}\times^{4}C_{3}=6\times4$ =24

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2 years ago

A sound wave travels through iron at a rate of 5120\,\dfrac{\text{m}}{\text{s}}5120 s m 5120, start fraction, start text, m, e

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Answer:

18432 km/h

Step-by-step explanation:

It is given that a sound wave travels through iron at a rate of 5120 m/s.

We know that

1 km = 1000 m

1 hour = 60 minutes

1 minutes = 60 second

Using these conversions we get

1 m = 0.001 km

1 hour = 3600 second

$5120\text{ m/s }=5120\times 0.001\times 3600\text{ km/h}$

$5120\text{ m/s }=18432\text{ km/h}$

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