Answer:
20x²+180x + 405
Step-by-step explanation:
Follow PEMDAS to know what you do first
square (2x + 9) by foiling
(2x+9) (2x + 9)
= 4x²+ 36x + 81
Multiply by 5
20x²+180x + 405
Y=7............................................................................................................................................................
6y = 24 -3x
divide both sides by 6.
y = (x)/2 +4
1) split the range in three identical invervals of size [6 - 0] / 3 = 2
2) form three rectangles
2a) First rectangle: base 2, height f(2) = 2^2 + 1 = 5
area 1 = base * height = 2 * 5 = 10
2b) second rectangle: base 2, height f(2+2) = 4^2 + 1 = 17
area 2 = 2 * 17 = 34
2c) third rectangle: base 2 height f(4+2) = 6^2 + 1 = 37
area 3 = 2*37 = 74
3) total area = area 1 + area 2 + area 3 = 10 + 34 + 74 = 118
Interest paid by Linda is equal to $4.272 approximately equal to $4.27.
<u>
Solution:
</u>
Given that
Rate of interest on first $200 = 1.8%
Rate of interest on any amount over $200 = 1.2%
Unpaid balance amount of Linda’s credit card bill = $256
Need to calculate interest paid by her on $256.
Unpaid balance = $256
=$200 + 56
Amount over $200 = 56
Interest paid on first $200 = 1.8% of 200
= 0.018 x 200 = $3.6
Interest paid on amount over $200 that is $56 = 1.2% of 56
= 0.012 x 56 = $0.672
So total interest paid on $256 = 3.6 + 0.672 = $4.272.
Hence interest paid by Linda is equal to $4.272 approximately equal to $4.27.
