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2 years ago

Scale factor help plz

Mathematics

1 answer:

adoni [48]2 years ago

3 0

Answer:

The scale factor is 3/2 or 1 to 1.5

Step-by-step explanation:

Here, we want to find the scale factor of the first to the second

Since the triangles are similar, it follows that the corresponding sides are of equal ratio

So, we have the scale factor for the sides as;

6/4 or 9/6

= 3/2 or 1 to 1.5

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A cubed-shaped box has its side lengths decreased by 3 cm, when this happens, the volume decreases by 1385cm^3. What is the side

mixer [17]

Answer:

Step-by-step explanation:

let side of cube=x cm

volume=x³ cm³

again side=(x-3) cm

volume=(x-3)³ cm³

x³-(x-3)³=1385

(a³-b³)=(a-b)(a²+ab+b²)

(x-x+3){x²+x(x-3)+(x-3)²}=1385

3(x^2+x²-3x+x²-6x+9)=1385

3(3x²-9x+9)=1385

9x²-27x+27=1385

9x²-27x+27-1385=0

9x²-27x-1358=0

$x=\frac{27\pm\sqrt{(-27)^2-4*9*(-1358)} }{2*9} \\x=\frac{27\pm\sqrt{729+48888} }{18} \\or~x=\frac{27\pm\sqrt{49617} }{18} \\or~x=\frac{27\pm 222.749}{18} \\taking positive side only as negative sign gives negative length.\\or~x=\frac{27+222.749}{18} \\or~x\approx13.87$

3 0

3 years ago

The list shows the price of a gallon of gasoline at 11 gas stations. $4.20, $4.09, $4.35, $4.39, $4.79, $4.55, $4.50, $4.22, $4.

Sauron [17]

The range of a list of numbers is the biggest number minus the smallest number. In this case, it is $4.79-$4.09 which equals $0.70.

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4 0

2 years ago

Read 2 more answers

I need help im stuck

Katyanochek1 [597]

Answer:

4712.4

Step-by-step explanation:

I got the same question a few days ago.

The volume is πr^2 * h / 3

r = 15

h = 20

225π * 20 / 3

1500π

It's 4712.38898

Round to 4712.4

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3 years ago

Help help help help help

Inessa [10]

Answer:

I believe it's 240°

Step-by-step explanation:

It's been awhile since I've done this but I believe that's the answer, here's a picture of a pug. Smile and have a good day!

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2 years ago

3 posters cost $9.60. At this rate how many posters can you buy with $48

Ksju [112]

About 15 because 9 times 5 = 45 reminder 3 than you add 3 times 5 = 15

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2 years ago