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Tju [1.3M]
2 years ago
13

The online price for a box of hair clips is $2.60. For any number of boxes purchased, the cost of shipping is $12. The equation

c=2.60b + 12 represents the total cost, c, of ordering b boxes of hair clips. If Mrs. Hilton orders 32 boxes of hair clips, what is the total cost? (6.EE.C.9)
Mathematics
1 answer:
stepan [7]2 years ago
7 0

Answer:

<h2>$43.2</h2>

Step-by-step explanation:

Step one:

given data

the total cost function is

c=2.60b + 12

Step two:

Required is c, when b= 12

substitute b=12 we have

c=2.60(12) + 12

c=31.2+ 12

c=43.2

the total cost = $43.2

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Answer:

6 =k

Step-by-step explanation:

Given the equation for inverse variation

xy = k

We know x=-3 and y = -2

Substituting these values in

(-3) (-2) = k

6 =k

7 0
3 years ago
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Electronics Unlimited sells TVs. There are 110 TVs on display in the showroom, and each TV is turned on to a random channel from
Lynna [10]

Answer:

  • <u><em>Option B. There will be close to 40 TVs but probably not exactly 40 TVs not showing a sports channel.</em></u>

Explanation:

There are a total of <em>7 sports channels</em> and 4 non-sports channels o<em>ut of 11 channels.</em>

The probability that one <em>TV will be not be showing a sports channel</em>, P(not S), is:

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  • P(not S) = 4/11.

The <em>best prediction</em> on <em>how many TVs will not be showing a sports channel </em>is, the expected value, which is equal to the number of TVs mulitplied by P(not S):

  • P(not S) = 110 × 4/11 = 40.

Since this is a random variable, the expected value is not the exact number of TV but just a probability.

Hence, the answer is the option <em>B: There will be close to 40 TVs but probably not exactly 40 TVs not showing a sports channel.</em>

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Step-by-step explanation:

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Fatima earned an 85 average in her science class. The average is based on 6 tests that she takes over the span of the marking pe
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Answer:

Fifth Score = 87

Sixth Score = 95

Step-by-step explanation:

Given

Average = 85

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Fifth\ score = x

Sixth\ Score = 8 + x

Required

Set up an equation

Solve for the fifth and sixth score

Average is calculated as thus:

Average = \frac{\sum x}{n}

Average = \frac{83 +78 + 87 + 80 + x + 8 + x}{6}

Substitute 85 for Average

85 = \frac{83 +78 + 87 + 80 + x + 8 + x}{6}

85 = \frac{83 +78 + 87 + 80 + 8+ x  + x}{6}

85 = \frac{336+ 2x}{6}

Multiply both sides by 6

85 * 6 = 336 + 2x

510= 336 + 2x

Solve for 2x

2x = 510 - 336

2x = 174

Solve for x

x = 174/2

x = 87

Hence:

<em></em>Fifth\ Score = 87<em></em>

<em></em>Sixth\ Score = 87 + 8<em></em>

<em></em>Sixth\ Score = 95<em></em>

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