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tangare [24]
3 years ago
8

a store sells new DVDs for $12 each. used DVDs sell for $7 each. Joseph is buying two new DVDs and X used DVDs. write an equatio

n that can be used to find X, the total Joseph must pay in dollars
Mathematics
2 answers:
vagabundo [1.1K]3 years ago
7 0
Given that new DVDs are selling for $12 and used for $7, then Joseph is buying:
12·2 + 7<em>x </em>= 

earnstyle [38]3 years ago
7 0
Used DVDs = x
Total = t

t = 12(2) + 7x
t = 24 + 7x
t - 24 = 7x 
(t - 24) / (7) = x

If given the total, you can plug it in to variable t and then work the right side of the equation to isolate variable x and solve to find its value. 


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5 0
3 years ago
To estimate μ, the mean salary of full professors at American colleges and universities, you obtain the salaries of a random sam
GenaCL600 [577]

Answer:

<h3>73220±566.72</h3>

Step-by-step explanation:

The formula for calculating the confidence interval is expressed as;

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Substitute the given values into the formula;

CI = 73,220 ± 2.576*4400/√400

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CI = 73,220± (2.576*220)

CI = 73220±566.72

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5 0
3 years ago
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D = x < — 4

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7 0
2 years ago
What is the volume of a rectangle with a height of 7 units a width of 5 units and a length of 8 units
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I hope I helped you.

4 0
3 years ago
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