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3 years ago

12

Kristin goes to the mall and buys a pair of brand name sunglasses on sale for 13 off the regular price of $240.00. How much will

she have to pay?

2 answers:

SIZIF [17.4K]3 years ago

7 0

$13 (?) off the original price of 240 is 229. She will have to pay $229.00

Gnom [1K]3 years ago

7 0

She would have to pay $13-$240=$227 she pays $227

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2 years ago

If S_1=1,S_2=8 and S_n=S_n-1+2S_n-2 whenever n≥2. Show that S_n=3⋅2n−1+2(−1)n for all n≥1.

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$\boxed{S_{k+1}=3\times2^k+2(-1)^{k+1}}$

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