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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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I need help on this one I have the image attached
mart [117]

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x = 40

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The ADF is 90 degrees so the CAF will also be 90

So you do

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4 0
3 years ago
Use the discriminant to determine the number and type of solutions the equation has.
lidiya [134]
Discriminant = square root (b^2 -4*a*c)
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4 0
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