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JulsSmile [24]
3 years ago
10

Listen Rachel babysat three children for five hours if they were paid $2.50 per hour for each child and divided their earnings e

qually how much did each girl receive
Mathematics
1 answer:
lina2011 [118]3 years ago
5 0

Answer: Each girl will receive $18.75.

Step-by-step explanation:

Given: Two girls babysat three children for five hours.

Hourly pay for each child = $2.50

Payment for 5 hours per child = 5\times\$2.50=\$12.5

Payment to 3 children for 5 hours = 3\times \$12.5=\$37.5

So, the amount received by each girl  = \dfrac{\text{Payment to 3 children for 5 hours}}{2}

=\dfrac{37.5}{2}=\$18.75

Hence, each girl will receive $18.75.

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3 years ago
1.9 An electronics store buys media from customers
Marina CMI [18]

The store pays $2 for each Blu-ray disc, $0.75 for each DVD, and

$0.1 for each VHS cassette

Step-by-step explanation:

An electronics store buys media from customers  to resell.

The given is:

1. The store pays one customer $5.30 for one  Blu-ray disc, four DVDs,

   and three VHS cassettes

2. The store pays the second customer $11.50 for five Blu-ray discs

    and  two DVDs

3. The store pays the third customer $10.20 for two Blu- ray discs, eight

    DVDs, and two VHS cassettes

We need to find the amount the store pays for each item

Assume that:

The cost of a Blue-ray disc is $x

The cost of a DVD is $y

The cost of a VHS cassette is $z

∴ x + 4y + 3z = 5.3 ⇒ (1)

∴ 5x + 2y = 11.5 ⇒ (2)

∴ 2x + 8y + 2z = 10.2 ⇒ ÷ 2

∴ x + 4y + z = 5.1 ⇒ (3)

- Subtract equation (3) from equation (1)

∵ x + 4y + 3z = 5.3 ⇒ (1)

∵ x + 4y + z = 5.1 ⇒ (3)

∴ 2z = 0.2

- Divide both sides by 2

∴ z = 0.1

Substitute the value of z in equation (3)

∴ x + 4y + 0.1 = 5.1

- Subtract 0.1 from both sides

∴ x + 4y = 5 ⇒ (4)

Let us solve equations (2) and (4)

∵ 5x + 2y = 11.5 ⇒ (2)

∵ x + 4y = 5 ⇒ (4)

- Multiply equation (2) by -2 to eliminate y

∴ -10x - 4y = -23 ⇒ (5)

- Add equations (4) and (5)

∴ -9x = -18

- Divide both sides by -9

∴ x = 2

- Substitute the value of x in equation (2)

∴ 5(2) + 2y = 11.5

∴ 10 + 2y = 11.5

- Subtract 10 from both sides

∴ 2y = 1.5

- Divide both sides by 2

∴ y = 0.75

The store pays $2 for each Blu-ray disc, $0.75 for each DVD, and

$0.1 for each VHS cassette

Learn more:

You can learn more about solving equations in brainly.com/question/9045597

#LearnwithBrainly

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What is the address of the element -5 in the matrix below?
Musya8 [376]

we have to find address of element -5 in the matrix

We know that

horizontal line represents number of rows

vertical line represents number of columns

We can see that

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Suppose, we have element in matrix

b_m_n

Here , m is number of rows

and n is number of columns

so, we got

m=3

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now, we can plug these values

and we get

b_3_2............Answer


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