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Pani-rosa [81]
3 years ago
11

A bag contains 21 red marbles, 4 white marbles, and 3 gray marbles. Do you randomly pick out a marble recorded color and put it

back in the bag. You repeat this process 84 times. How many white or gray marbles do you expect to get?
Mathematics
1 answer:
Svetach [21]3 years ago
5 0

Answer:

28

Step-by-step explanation:

you add 21, 4, and 3 to find the total

then you find how many are white or gray

7/28= 1/3

1/3 times 84

84 times 1 divided by 3

84/3

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Using properties of parallelograms, RSTU is a parallelogram that has vertices R (-3,1), S (3,4), and T( 6,2(. What are the coord
ElenaW [278]

Answer:

(0, -1)

Step-by-step explanation:

A parallelogram is a quadrilateral (has four sides) in which opposite sides are parallel to each other. Also for a parallelogram, the opposite sides and angles are equal to each other.

Hence for parallelogram RSTU, RS // TU and RU // ST

Let the coordinate of U be (x , y). Two lines are parallel to each other if their slopes are equal, hence:

Slope of RS = (4 - 1) /[3 - (-3)] = 3/6 = 0.5

Slope of ST = (2 - 4) /[6 - 3] = -2/3

Slope of RU = (y - 1) /[x - (-3)] = (y - 1) / (x + 3)

Slope of TU = (y - 2) /[x - 6]

Slope of RU = Slope of ST

(y - 1) / (x + 3) = -2/3

3y - 3 = -2x -6

2x + 3y = -6 + 3

2x + 3y = -3                  (1)

Slope of RS = Slope of TU

0.5 = (y - 2) /[x - 6]

0.5x - 3 = y  - 2

0.5x - y = 1                  (2)

Solving 1 and 2 simultaneously gives:

x = 0, y = -1

Therefore the coordinates of U = (0, -1)

8 0
3 years ago
There are about 45000 farms in Nebraska using approximately 45 million acres of land. This farmland covers about 9/10 of the sta
yulyashka [42]

9/10 : 1/10 = 45,000,000 : x

x = 45000000/9 = 5,000,000

Answer: 5 million acres


6 0
3 years ago
Apply the distributive property to factor out the greatest common factor. 32 + 44 = 32+44=32, plus, 44, equals
ICE Princess25 [194]

Answer:

4 is the largest number that is common to both 32 and 44.  Factoring it out looks like this: 4(8 + 11) = 4(8 + 11).  That's weird to me but all textbooks begin that process just that same way.

Step-by-step explanation:

4 0
3 years ago
Read 2 more answers
Angle I and N are complementary. If angle N has a meause of 48 degrees, find the measure of angle I
Afina-wow [57]

Answer:

42°

Step-by-step explanation:

Complementary angles are two angles that add up to 90°

1) 90-48 = 42

Hope this helps! :)

8 0
3 years ago
Read 2 more answers
An equation for annealing soda-lime glass is y(t)=−14t+500 , where t is time in minutes and y is the temperature of the glass in
beks73 [17]

An equation for annealing soda-lime glass is y(t)=−14t+500 , where t is time in minutes and y is the temperature of the glass in ˚C.

To find the y intercept , we plug in 0 for t

y intercept is the value , where time is 0 minutes

so we plug in 0 for t  and find out y(0)

y(t)=−14t+500

y(0)=−14(0)+500 = 500

When t=0 , the value of y = 500

So , y intercept is (0,500)


4 0
3 years ago
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