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3 years ago

A bag contains 9 red marbles,7 blue marbles, and 4 green marbles. A randomly drawn marble is blue?

Mathematics

1 answer:

Elena-2011 [213]3 years ago

3 0

Answer: $\frac{7}{20}$

Step-by-step explanation:

If this is asking for the probability of randomly drawing a blue marble then it'll be however many blue marbles (what you're trying to find) out of the total number of marbles

Blue marbles: 7

Total marbles: 20

$\frac{7}{20\\}$

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What is the solution to the system x+ y =4 and 2x - y = -1

Lostsunrise [7]

Answer:

Step-by-step explanation:

hello :

the system is : x+ y =4 ...(*)

2x - y = -1...(**)

add(*) and (**) : 3x=3 so : x=1

put this value into (*) : 1+y=4 so : y=3

one solution : (1 , 3)

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3 years ago

The teacher passed out math books.The length is 10 inches and the width is 8 inches.What is the perimeter of each book?

miv72 [106K]

Answer: The perimeter of each book is: " 36 in. " .

__________________________________________________

Step-by-step explanation:

__________________________________________________

Note that the given units are all in "inches (in.)" .

Use the formula for the "perimeter of a rectangle" ;

{which happens to work for a "square" as well;

since a "square" is a rectangle.}.

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This is based on the assumption that the book is shaped like a

"rectangle" (or "square" —which is a rectangle).

__________________________________________________

The formula for the Perimeter of a rectangle is:

P = 2 L + 2 w ;

in which:

P = the perimeter of the rectangle;

for which we shall solve; [in "inches (in.)" ] ;

L = the length of the rectangle = 10 in. (given) ;

w = the width of the rectangle = 8 in. (given) .

___________________________________________________

Now, plug the given values for the "length (L)" and the "width (w)" ;

as follows:

___________________________________________________

P = (2 * 10 in.) + (2 * 8 in.) ;

P = (20 in.) + (16 in.) ;

P = 36 in.

___________________________________________________

Answer: The perimeter of each book is: " 36 in. " .

___________________________________________________

Hope this helps!

Best wishes in your academic pursuits

— and within the "Brainly" community!

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3 years ago

Which is the graph for y=(x)-2?

Alex

The shape of this graph is

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2 years ago

An auto mechanic charges (C) an initial fee of $50 and then $40 per hour. The graph of this model would be:

victus00 [196]

The graph of this model would be a straight line that increases only option third is correct.

<h3>What is a line graph?</h3>

A line graph is a graph made up of segments of straight lines that connect the depicted data points.

We have:

An auto mechanic charges (C) an initial fee of $50 and then $40 per hour.

Let T be the total fee and h is the number of hours

T = 50 + 40h

The above equation represents a graph of a straight line as the slope of the line is positive.

m = 50

Thus, the graph of this model would be a straight line that increases only option third is correct.

Learn more about the line graph here:

brainly.com/question/23680294

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tigry1 [53]

Answer:

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Step-by-step explanation:

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