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3 years ago

A rectangle is twice as long as it is wide. Its perimeter is 30. What is its area?

Mathematics

1 answer:

Zarrin [17]3 years ago

5 0

Answer:

It's area is 50.

Step-by-step explanation:

We can figure out that the length is 10 and the width is 5 since the rectangle is twice as long as it is wide. Then multiply L x W and the result is 50.

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What are the exact solutions of x2 = 4 − 7x?

Troyanec [42]

I belive x=2.25 because u have to add 2x and 7x and that equals 9x then u devide 9 and 4 and that will give u 2.5

3 0

3 years ago

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The position of a particle moving to the right on the x-axis is given by x(t), where x(t) is measured in inches and t is measure

wlad13 [49]

Answer:

No options

Step-by-step explanation:

Knowing that V=in/min = x(t)/t and according to the graph,

V=20in/20min=in/min, so

No options since speed is not inches per minute, spedd (V) = inches over minutes

8 0

3 years ago

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Express f(x) = |x-2| +|x+2| in the non-modulus form. Hence, sketch the graph of f.

alexgriva [62]

Recall that

$|x|=\begin{cases}x&\text{if }x\ge0\\-x&\text{if }x$

There are three cases to consider:

(1) When $x+2$ , we have $|x+2|=-(x+2)$ and $|x-2|=-(x-2)$ , so

$|x-2|+|x+2|=-(x-2)-(x+2)=-2x-4$

(2) When $x+2\ge0$ and $x-2$ , we get $|x+2|=x+2$ and $|x-2|=-(x-2)$ , so

$|x-2|+|x+2|=-(x-2)+(x+2)=4$

(3) When $x-2\ge0$ , we have $|x+2|=x+2$ and $|x-2|=x-2$ , so

$|x-2|+|x+2|=(x-2)+(x+2)=2x$

So

$|x-2|+|x+2|=\begin{cases}-2x-4&\text{if }x$

4 0

3 years ago

kimmys savings account has a balance of $76.23 in june.by september, her balance is 5 times as much as her june balance.between

nalin [4]

From the information you have given me, I would say Kimmy has $<span>468.98 </span>dollars in her bank account.

Does she get more money during the other months, just as she had gotten 5 times as much as she had in a 3 month span? (From june to september.) All I could tell was her money was multiplied by 5, then you add $87.83 more into her account.

Please check my math if you want to be sure.
$76.23 * 5 = $381.15
$381.15 + 87.83 = 468.98

4 0

3 years ago

Each morning, Jared needs 60 minutes to get ready for school. Kira needs 7/12 as much times as Jared. How many minutes does kiar

Fudgin [204]

Answer:

Kira takes 35 minutes to get ready for school.

Step-by-step explanation:

The time taken by Jared to get ready for school is, 60 minutes.

Time taken by Kira to get ready for school is $\frac{7}{12}$ times as much as Jared needs.

Compute the time taken by Kira as follows:

Time taken by Kira $=\frac{7}{12}\times60=35\ minutes$

Thus, Kira takes 35 minutes to get ready for school.

3 0

3 years ago