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3 years ago

Please help me with number 9! (Math)

Mathematics

1 answer:

Andrej [43]3 years ago

8 0

Hi

I belive you add the top side (4) plus the bottom side (9.5) witch would equal 13.5 times the hieght (3) equals 40.5 divided by 2 equals 20.25. the area is 20.25ft squared

another way to do it
4+9.5= 13.5
13.5×3= 40.5
40.5÷2= 20.25ft

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A rectangle has an area of x square units. The rectangle is dilated to create a new rectangle with an area of 9x square units. D

Alika [10]

The reactangle has an area of x.

So that means two numbers multiplied to each other equal to x. We can just think of itwo numbers that when multiplied equal to x as a and b.

So that means the side lengths are a and b. And ab = x (will be using this right next).

And it was multiplied by some scale factor that made the new area 9x. So if the scale factor is y, then:

$(y\times a)\times (y\times b)=9x$
$y^2ab=9x$
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$y=3$

y can not equal to -3, because the length of a side of any polygon can never be negative.

So the dilation is 3.

And so if the dimension is 5 by 8.

Then the area is $5 \times 8=40$

And so then $x=40$

And then after the dilation, it would be $9x=9(40) = 360$

We could check it another way too. Since we said the scale factor is 3, then:

$( 5 \times 3) \times (8 \times 3) = 15 \times 24 = 360$

So basically 15 by 24 is the new dimensions :)

6 0

2 years ago

PLZ HELP!!!!!!! (20 points)

AlekseyPX

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Neither A nor B

Step-by-step explanation:

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3 years ago

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zloy xaker [14]

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Step-by-step explanation:

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2 years ago

Read 2 more answers

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const2013 [10]

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Step-by-step explanation:

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To find how much each piece costs we have to divide $2.40 by 4. Like this:

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In the 4 piece, every chicken strip costs .60 cents.

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Like before we are going to divide $3.00 by 6.

$\frac{3.00}{6} = .50$

In the 6 piece, every chicken strip costs .50 cents.

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2 years ago

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Mkey [24]

The equation looks like this:

26=x*3.5+8.50

where x is the number of pen you bought.

We solve it like this:
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now we divide both sides by 3.5:
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so you purchased 5 pens.

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2 years ago