3 years ago

On a floor plan drawn at a scale of 1:100, the area of a rectangle room is 30 cm2. what is the actual area of the room?

Mathematics

1 answer:

marishachu [46]3 years ago

8 0

1cm/100cm= 30cm/xcm. X=3000 cm= 30 m. Answer is d

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Please show work, i’ll mark as brainliest

bulgar [2K]

Answer:

y=4

x=-3

Step-by-step explanation:

4(-3)-9y=-48

-12-9y=-48

-9y=-36

y=4

x=-3

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3 years ago

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Function or not a function

Shkiper50 [21]

Answer:

Not a function.

Step-by-step explanation:

<u>Functions have graphs or slopes.</u>

<u>This is not a function.</u>

<u>This is not on a graph or on a slope.</u>

Your answer is not a function.

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3 years ago

By driving 8 mph faster than Bob, John can make a 230 mile trip in one half hour less. How fast does Bob drive on the trip? Roun

____ [38]

Answer: The speed of Bob is 56.8 km/hr.

Step-by-step explanation:

Let the speed of Bob be 'x'.

Let the speed of John be 'x-8'.

Distance covered = 230 miles

time = $1\dfrac{1}{2}=\dfrac{3}{2}\ hr$

According to question, we get that

$\dfrac{230}{x}-\dfrac{230}{x+8}=\dfrac{3}{2}\\\\230\dfrac{x+8-x}{x(x+8)}=\dfrac{3}{2}\\\\\dfrac{230\times 8}{x^2+8x}=\dfrac{3}{2}\\\\\dfrac{1840}{x^2+8x}=\dfrac{3}{2}\\\\1840\times 2=3x^2+24x\\\\3680=3x^2+24x\\\\3x^2+24x-3680=0\\\\x\approx 56.8\ km/hr$

Hence, the speed of Bob is 56.8 km/hr.

6 0

3 years ago

60 more points i believe

kondor19780726 [428]

f(x) does have an inverse function since it does pass the horizontal line test

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2 years ago

The given data set shows the weight in pounds of nine dogs at an animal hospital. Which data value is considered an outliner

nignag [31]

Where is the given data?

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4 years ago