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OLga [1]
3 years ago
9

One coin is taken at random from a bag containing 5 nickels, 3 dimes, and 6 quarters. Let X be the value of the coin selected. F

ind E(X). (Round your answer to two decimal places.) E(X)
Mathematics
1 answer:
Fynjy0 [20]3 years ago
7 0

Answer:

14.64 cents

Step-by-step explanation:

5(5/14) + 10(3/14) + 25(6/14)

= 205/14

Approx. 14.64 cents

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Emily begin piano practice at 3:25 she finished at 5:00 how long did she practice​
S_A_V [24]

Answer: 1 hour 35 minutes

assuming both times were p.m. or a.m. and not one of each

Step-by-step explanation:

60 minutes in an hour.

3 hours 25 minutes = 205 minutes

5 hours = 300 minutes

300-205 = 95 minutes

95 minutes = 1 hour (60 minutes) and  35 minutes

3 0
3 years ago
(c) Express the diagonal of a rectangle, D, in terms of its width, w, if the area of the rectangle is 13 square feet.
Mrrafil [7]
We are asked to express the diagonal of a rectangle in terms of the width in which the area of the polygon is equal to 13 square feet. The area of teh rectangle is equal to length times width. That is 13 = lw; diagonal using pythagorean theorem is sqrt ( l2 + w2). Thus d =  sqrt ( (13/w)2 + w2) = sqrt ( (169/w2 + w2) = sqrt ( (169 + w4)/w2) = 1/w  sqrt (169 + w4)
3 0
3 years ago
Read 2 more answers
What are both of these shaded as?
Sedaia [141]

Answer:

1 whole and 15/100= <em><u>1.15</u></em>

Step-by-step explanation:

The first box is 1 whole, in total there are 100 squares. All u need to do is count the number of squares

4 0
3 years ago
Does the ordered pair, (1, 5/2) satisfies the given equation<br> 3x-3y=-3 ?
vampirchik [111]

Answer:

Ordered pair, (1, 5/2) does not satisfy the given equation  3x-3y=-3

Step-by-step explanation:

3x-3y=-3

Here (x, y) = (1, \frac{5}{2} )

3(1)-3(\frac{5}{2} )=-3

3- (\frac{15}{2} )=-3\\6-15=-6\\-9\neq -6

7 0
3 years ago
Write 6(9+2k)= -3 in written form
Alchen [17]

Answer:

27k+3=0

Step-by-step explanation:

Write in standard form.

this way?

4 0
3 years ago
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