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3 years ago

14

It takes you 4040 seconds to walk from the first (ground) floor of a building to the fourthfourth floor. how long will it take

to walk from the first floor to the eightheighth floor (at the same pace, assuming that all floors have the same height).

1 answer:

alina1380 [7]3 years ago

3 0

How long will it take to walk from the first floor to the eightheighth floor (at the same pace, assuming that all floors have the same height).
8080 seconds

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shusha [124]

$\huge\text{Hey there!}$

$\mathsf{\dfrac{2}{5}x-7=11}$

$\large\textsf{ADD 7 to BOTH SIDES}$

$\mathsf{\dfrac{2}{5}x -7+7=11+7}$

$\large\textsf{CANCEL out: -7 + 7 because that gives you 0}$

$\large\textsf{KEEP: 11 + 7 because it helps you solve for your x-value}$

$\mathsf{11 + 7 = 18}$

$\large\text{New EQUATION: }\mathsf{\dfrac{2}{5}x = 18}$

$\large\textsf{MULTIPLY }\mathsf{\dfrac{5}{2}}\large\textsf{ to BOTH SIDES }$

$\mathsf{\dfrac{2}{5}x \times \dfrac{5}{2}=\dfrac{5}{2}\times18}$

$\large\textsf{CANCEL out: }\mathsf{\dfrac{5}{2}\times\dfrac{2}{5}}\large\textsf{ because it gives you 1}$

$\large\textsf{KEEP: }\mathsf{\dfrac{5}{2}\times 18}\large\textsf{ because it solves for x}$

$\large\textsf{New EQUATION: }\mathsf{x =18\times\dfrac{5}{2}}$

$\mathsf{18\times\dfrac{5}{2}=x}$

$\mathsf{18\times\dfrac{5}{2}=\bf 45}$

$\boxed{\boxed{\large\textsf{Answer: \huge \bf Option J. 45}}}\huge\checkmark$

$\text{Good luck on your assignment and enjoy your day!}$

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maks197457 [2]

Answer: Choice D

$x_n = f(x_{n-1})$

This basically says "the nth term is found by computing math, aka evaluating some function, based on the (n-1)th term".

As an example, we could have a function that simply squares the input

Let's say we started at 5. It squares to 25 which in turns squares to 625, and so on. Each new term is based on the old term. Namely, we squared the old n-1 term to get the new nth term.

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