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Dima020 [189]
3 years ago
8

Joseph is shopping for school supplies. He can buy a box of 24 pens for $4.32 or a box of 36 pens for $5.76. Which is a better b

uy? Show your reasoning.
Mathematics
1 answer:
Fittoniya [83]3 years ago
3 0
The better buy is 36 pens for $5.76 Because if you divide $5.76 by 36 pens Each pan will cost only $.16 and if you divide $4.32 by 24 pans each pen will cost $.18 so the better buy is the 36 pens.
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You roll a six-sided die and spin the spinner below. What is the
Musya8 [376]

Answer:

Its a 1 in 6 chance of rolling a 3

Step-by-step explanation:

Let me know how many color and i can tell you the probability if spinning blue, enjoy.

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3 years ago
Can someone help me with this math problem?
Kipish [7]

Answer:

im not able to do that question it is confusing

Step-by-step explanation:

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3 years ago
paulette has arrived at cape horn. there are five penguins waiting to cross over to antarctica. jim goes before john but after j
Nikolay [14]

Well, this is a guess. Jim goes before john, but after joe. So Jim is second. John is third, so that leaved Joe.

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6 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

b)

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

c)

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

d)

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

e)

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

f)

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

g)

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

h)

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

6 0
3 years ago
Please help me I will mark brain-list
kozerog [31]

Answer:

q12 is 8

q13 is 81

Step-by-step explanation:

100*6 =600 / 75 = 8

90*72 = 6480 / 80 = 81

6 0
3 years ago
Read 2 more answers
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