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SashulF [63]
3 years ago
7

The function f (x) = .85x+3.99 models the total cost of purchasing x key chains from an internet company that charges shipping t

he function g (x) = 1.10x models the total purchasing of x number of the same key chains from an company that does not charge shipping. Rounding to the nearest whole number what is the best approximation of the number of key chains for which the two companies charge the same amount?
Mathematics
1 answer:
lina2011 [118]3 years ago
4 0

Answer:

16 key chains

Step-by-step explanation:

Given

f(x) = 0.85x + 3.99 ---company A

g(x) = 1.10x --- company B

Required

Value of x when f(x) = g(x)

We have:

f(x) = g(x)

0.85x + 3.99 = 1.10x

Collect like terms

0.85x - 1.10x = -3.99

-0.25x = -3.99

Solve for x

x = \frac{-3.99}{-0.25}

x = 15.96

x= 16 --- approximated

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The expression that can be used to represent the list price of the smartphone is 5179.99 * (1- 25%) and the value is 3884.9925

<h3>What expression can be used to represent the list price of the smartphone? </h3>

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