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Nana76 [90]
3 years ago
8

Part A There is a function f, where f(n) 1200n+ 3500 represents the number of people in a town who owned a smartphone n years af

ter 2007. How many people owned a smartphone in this town in the year 2010? Enter your answer in the box.
Mathematics
1 answer:
mojhsa [17]3 years ago
3 0
7100 people as of 2010
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Step-by-step explanation:

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Slope intercept form that passes though the point (-2,-3) and has a slope of 5/2
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\text{Given that,}\\\\(x_1,y_1) = (-2,-3), ~~\text{and slope,}~~m = \dfrac 52\\\\\\\text{Now,}\\\\y -y_1 =m(x-x_1)\\\\\implies y +3 = \dfrac52 (x+2)\\\\\implies y = \dfrac 52(x+2) -3\\\\\\\implies y = \dfrac{5}2 x + 5 -3 \\\\\\\implies y = \dfrac 52 x + 2\\\\\\\text{This is the slope-intercept form(y =mx+b)}.

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2 years ago
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In an ore, 9.8% of its total weight is metal. How many pounds of metal are in 1,950 lb of ore?
Fudgin [204]

Answer

Find out the  how many pounds of metal are in 1,950 lb of ore .

To proof

let us assume that the pounds of metal are in 1,950 lb of ore be x .

As given

In an ore, 9.8% of its total weight is metal.

ore weight = 1,950 lb

9.8% is written in the decimal form

= \frac{9.8}{100}

= 0.098

Than the equation becomes

x = 0.098 × 1950

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Hence proved



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