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3 years ago

A rectangle has perimeter 80 m and length 27m what is the width

Mathematics

1 answer:

saw5 [17]3 years ago

7 0

Answer:

i think it's 13

Step-by-step explanation:

perimeter is L+ L+W+W

27+27=54

80-54=26

26/2=13

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4 years ago

Find an explicit rule for the nth term of the sequence.The second and fifth terms of a geometric sequence are 18 and 144, respec

vova2212 [387]

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$\begin{gathered} a_n\text{ = ar}^{n-1} \\ Where\text{ a is the first term} \\ r\text{ is the common ratio} \end{gathered}$

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$\begin{gathered} \text{ar}^{2-1}\text{ = 18} \\ ar\text{ = 18} \\ \\ ar^{5-1}=\text{ 144} \\ ar^4\text{ =144} \end{gathered}$

Divide the expression for the fifth term by the expression for the second term:

$\begin{gathered} \frac{ar^4}{ar}\text{ = }\frac{144}{18} \\ r^3\text{ = }\frac{144}{18} \\ r\text{ = 2} \end{gathered}$

Substituting the value of r into any of the expression:

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$a_n\text{ = 9\lparen2\rparen}^{n-1}$

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