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2 years ago

A rectangle is three times as long as it is wide if it's perimeter is 56cm.find the width of the rectangle

Mathematics

2 answers:

Zina [86]2 years ago

5 0

the length is 3W cm. THerefore, the perimeter is 2*(3W + W) = 8W = 56 So W = 7 cm.

Nataliya [291]2 years ago

3 0

Answer:

I'm answering the question that u have posted in comment.

Step-by-step explanation:

let the age of her daughter be x

now,

3x-6=36

3x=36-6

x=30/3

x=10

so, the age of her daughter is 10years.

hope it helps.

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As before the price increases, Store 4 has the highest price among other Stores. After price increases, Store 4 continued to has highest price among them

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3 years ago

A parking garage charges a $2.50 daily fee plus an hourly rate of $4.00. If you have $12.50 to pay for parking, how long can you

Vesnalui [34]

Step-by-step explanation:

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2 years ago

What is the 9th term of the geometric sequence 4, −20, 100, …?

sveta [45]

First, we are going to find the common ratio of our geometric sequence using the formula: $r= \frac{a_{n}}{a_{n-1}}$ . For our sequence, we can infer that $a_{n}=-20$ and $a_{n-1}=4$ . So lets replace those values in our formula:
$r= \frac{-20}{4}$
$r=-5$

Now that we have the common ratio, lets find the explicit formula of our sequence. To do that we are going to use the formula: $a_{n}=a_{1}*r^{n-1}$ . We know that $a_{1}=4$ ; we also know for our previous calculation that $r=-5$ . So lets replace those values in our formula:
$a_{n}=4*(-5)^{n-1}$

Finally, to find the 9th therm in our sequence, we just need to replace $n$ with 9 in our explicit formula:
$a_{9}=4*(-5)^{9-1}$
$a_{9}=4*(-5)^{8}$
$a_{9}=1562500$

We can conclude that the 9th term in our geometric sequence is <span>1,562,500</span>

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2 years ago