All categories

2 years ago

A LaDawn buys a ten-pack of gel pens for $7.50. How much did each pen cost?

Mathematics

1 answer:

Ira Lisetskai [31]2 years ago

3 0

Answer: Each pen cost $0.75

Step-by-step explanation:

If A LaDawn buys a pack of 10 gel pens and the total cost is $7.50 then you divide 7.50 by 10.

You might be interested in

What are the first five terms of the sequence defined by the given function?

kenny6666 [7]

Answer: B. -6, -4, -2, 0, 2

Step-by-step explanation: Use the attachment to help you with your answer.

Anyways, have an amazing day!

8 0

3 years ago

You inherit $5000 from your long lost Uncle Harold. The bad news is that the money must sit in a bank account for the next ten y

erastovalidia [21]

Answer:

5360

Step-by-step explanation:

5000*1.072=5360

6 0

2 years ago

A bag contains 6 blue and 4 red marbles. You pick out a marble, record its color,

Archy [21]

Answer:

times you have to remove a red marble

Step-by-step explanation:

8 /30/=3.75

=3.75

5 0

3 years ago

The probability distribution of the amount of memory X (GB) in a purchased flash drive is given below. x 1 2 4 8 16 p(x) .05 .10

Rama09 [41]

Answer:

a) $E(X) = 6.45$

b) $E(X^{2} )= 57.25$

c) $V(X) = 15.648$

d) E(3X + 2) = 21.35

e) $E(3X^{2} +2) = 173.75$

f) V(3X+2) = 140.832

g) E(X+1) = 7.45

h) V(X+1) = 15.648

Step-by-step explanation:

a) $E(X) = \sum xP(x)$

$E(X) = (1*0.05) + (2*0.10) + (4*0.35) + (8*0.40) + (16*0.10)\\E(X) = 6.45$

$E(X^{2} ) = (1^{2} *0.05) + (2^{2} *0.10) + (4^{2} *0.35) + (8^{2} *0.40) + (16^{2} *0.10)\\ E(X^{2} )= 57.25$

$V(X) = E(X^{2} ) - (E(X))^{2} \\V(X) = 57.25 - 6.45^{2} \\V(X) = 15.648$

$E(3X+2) = 3E(X) + 2\\E(3X+2) = (3*6.45) + 2 \\E(3X+2) = 21.35$

$E(3X^{2} +2) = 3E(X^{2} ) + 2\\E(3X^{2} +2) = (3*57.25) + 2 \\E(3X^{2} +2) = 173.75$

$V(3X+2) = 3^{2} V(X)\\V(3X+2) = 9*15.648\\V(3X+2) = 140.832$

$E(X+1) = E(X) + 1\\E(X+1) = 6.45 + 1\\E(X+1) =7.45$

$V(X+1) = 1^{2} V(X)\\V(X+1) = 15.648$

6 0

3 years ago

A new building is 25 meters tall. how many decimeters tall is the building?

Akimi4 [234]

25 meters is the same as 250 decimeters tall.. hope this helped

3 0

3 years ago

Read 2 more answers