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Margaret [11]
3 years ago
14

The sum of two times a number and 7 is five times the difference of a number and six. Solve for the variable then Round your ans

wer to the nearest hundredths.
Mathematics
1 answer:
Vanyuwa [196]3 years ago
7 0

Answer:

12.33

Step-by-step explanation:

let 'n' = a number

2n + 7 = 5(n - 6)

2n + 7 = 5n - 30

-3n = -37

n = 37/3 or 12.33

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Answer:

Linear Equation: P = 0.008T + 0.13

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Step-by-step explanation:

From 1975 to 2005 [30 years], the price increased from 0.13 to 0.37 [0.24].

This means the rate of change (slope) is 0.24/30 = 0.008

This means Price changed (increased) by $0.008 per year.

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The y-intercept (P) is at the starting point which is at T = 1975, the price was 0.13. Hence y-intercept is 0.13

The equation of a line is given as

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Now, we can write the linear model equation as:

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To find the price of stamp in 2015, we see that this is 40 years later after 1975. So we plug in 40 into T in the equation found above:

P = 0.008(40) + 0.13

P = $0.45

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A horseshoe with nails weighs 8.2 ounces. Six nails are in each horseshoe. Each nail weighs 0.2 ounces
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Step-by-step explanation:

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