2 years ago

It takes 3 minutes to walk 37.5 meters what is the speed.

1 answer:

5 0

You have to divide the amount of meters he walked by the time he spent, so 37.5 divided by 3. That equals 12.5 meters per minutes.

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Write the explicit formula for the geometric sequence.<br><br> a1 = -5 a2 = 20 a3 = -80

Anni [7]

$a_1 = -5;\ a_2 = 20;\ a_3 = -80 \\\\a_2:a_1=r\ and\ a_3:a_2=r\\\\r=20:(-5)=-4\ check\ r=-80:20=-4\\\\a_n=a_1r^{n-1}\to a_n=-5\cdot(-4)^{n-1}=-5\cdot(-4)^{-1}\cdot(-4)^n\\\\=-5\cdot\left(-\dfrac{1}{4}\right)\cdot(-4)^n=\dfrac{5}{4}\cdot(-4)^n\\\\Answer:\boxed{a_n=-5\cdot(-4)^{n-1}\ other\ a_n=\frac{5}{4}\cdot(-4)^n}$

6 0

2 years ago

Simplify the expression completely.<br><br> 16x-12x

romanna [79]

These are like terms, meaning that they are completely the same disregarding the coefficient.

To combine like terms, add the coefficients.
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Final answer: 4x

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2 years ago

Helppppp..... evaluate 3^-3=

elixir [45]

ANSWER

The answer is

$\frac{1}{27}$