Mathematics: Part B and part C The function is f(x)=x^2+7x-8 Rewarding 18 points

480 pennies dated after 2000.Step-by-step explanation:1. Pennies dated before 1980 (x) - 25%,All pennies (1,200) - 100%.Then2. Pennies dated from 1980 to 2000 (y) - 35%,All pennies (1,200) - 100%.Then3. Rest pennies are dated after 2000, then...

Part B and part C The function is f(x)=x^2+7x-8 - id2789338690, dontcareanyonemo

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cearp

27.05.2023

Mathematics

480 pennies dated after 2000.

Step-by-step explanation:

1. Pennies dated before 1980 (x) - 25%,

All pennies (1,200) - 100%.

Then

$\dfrac{x}{1,200}=\dfrac{25}{100},\\ \\100x=25\cdot 1,200,\\ \\x=25\cdot 12=300.$

2. Pennies dated from 1980 to 2000 (y) - 35%,

All pennies (1,200) - 100%.

Then

$\dfrac{y}{1,200}=\dfrac{35}{100},\\ \\100y=35\cdot 1,200,\\ \\y=35\cdot 12=420.$

3. Rest pennies are dated after 2000, then

1,200-300-420=480.

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Part B and part C
The function is f(x)=x^2+7x-8

Rewarding 18 points

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