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Fittoniya [83]
3 years ago
6

Plz help me on this math question

Mathematics
2 answers:
aleksley [76]3 years ago
6 0
She should expect 100 because there are 25 in the bag and if you have a 25% chance of pulling out a green marble so out of 400 trials you should pull out hopefully 25 in the first 100 trials and multiply 25 by 4 and you get 100. 

asambeis [7]3 years ago
3 0
It is 25. I think.. lol
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I 3) At 10:30 am, a submarine was 43 feet below the ocean surface. By 10:45 am, it was 271 feet below the surface. How much did
Aleks [24]

Answer: 228 Feet

Step-by-step explanation: 271 feet - 43 feet = 228 feet descended.

3 0
3 years ago
Solve the linear equations of 2x - y = 4<br> 1 - 3y = -3<br> Please I’m in the middle of a test help
lesantik [10]

Answer:

x = \frac{8}{3}, y = \frac{4}{3}

Step-by-step explanation:

Solve for  y  in the first equation.

y=\frac{4}{3}, replace y with \frac{4}{3}

Solve for in the first equation.

x = \frac{8}{3}, y = \frac{4}{3}

<em>good luck, hope this helps :)</em>

3 0
3 years ago
Read 2 more answers
X+5<br> 3<br> ​ <br> + <br> x−5<br> 2x+5<br> ​ <br> = <br> x−5<br> 3x<br> ​
Lina20 [59]

Answer: 4x+5 \neq 4x-5

Step-by-step explanation: It's really hard to tell what the question is.

8 0
3 years ago
Please explain how to find the cubic area of a room and the whole building.
nikitadnepr [17]
Well, first lets get our terms straight.
There's no such thing as "cubic area".

-- The distance along a road is "length".  That's how much string you need
to stretch from one end of the road to the other.

-- The amount of surface on a sheet of paper, a floor, or a front yard is "area".
That's how much paint or carpet you need to cover it.

-- And the space inside a balloon, a milk jug, or a room is the "volume".
That's how much water it takes to fill it up.

To find the volume of a room, measure its length, width and height,
and then multiply them all together.

           Volume = (length) · (width) · (height)  of the room.

If you measure the dimensions of the room in feet, then
the volume will be in cubic feet.

If you measure the dimensions of the room in inches, then
the volume will be in cubic inches.

If you measure the dimensions of the room in meters, then
the volume will be in cubic meters.

You could do the whole building the same way ... multiply its
(length) x (width) x (height) ... but there could be a big problem
trying to do that.  You can only do it that way when the space is
the shape of a rectangular prism.  That's the shape of an ice cube,
a Rubik's cube, a brick, a cigar box, a pizza box, a suitcase, a
shoe box ... things like that.  If the building isn't the shape of a giant
brick or a shoebox, then it probably looks like a stack of several blocks
with different sizes.  It might even have some curves on it, so you
can't just pick a length, a width, and a height and multiply them.
In that case, if you need to find the volume of the whole building,
you have two choices:

Choice #1).  Get a drawing of the building, and see if it's possible to
break it up into smaller sections, with each section shaped like a brick
or a shoebox.  For each section, multiply the (length x width x height)
of that section, and when you've done that for all the sections, add them
all up.

Choice #2).  Measure the length, width and height of every room
in the building, use those to calculate the volume of each room,
and when you have them all, add them all up to get the volume of
the whole building.
6 0
3 years ago
A scuba diving resort hotel offers divers two plans. Plan A gives 3 nights’ lodging and 4 dives. Plan B gives 5 nights’ lodging
Marizza181 [45]

Answer:

x = 35 and y = 100

Step-by-step explanation:

Let x = dollar cost per dive  and y = dollar cost per night.

ATQ,

4x+3y = 440 .....(1)

and

8x + 5y = 780 .....(2)

Multiply equation (1) by 2.

8x+6y = 880......(3)

Subtract equation (3) from (2).

8x + 5y -(8x+6y)= 780-880

-y = -100

y = 100

Put the value of y in equation (1).

4x+3(100) = 440

4x = 440-300

4x = 140

x = 35

Hence, the value of x is 35 and that of y is 100.

8 0
3 years ago
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