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2 years ago

14

25 POINTS + BRAINLYEST

2 answers:

Lady_Fox [76]2 years ago

4 0

1 and 2 over 3 cubic inches

Anna71 [15]2 years ago

4 0

Answer: 1/3

Step-by-step explanation:

every cube 1/6 of an inch. there are 12 cubes and length of each cube is 1/6 inch. to find the total length, lets multiply 1/2 with 12. the answer is 2. this means total length is 2 inches. now for the width...there are 3 cubes each of 1/6 inch side length. so to find total width we'll multiply 3 with 1/6 and the answer is 1/2. now for the height there are 2 cubes each of 1/6 inches...to find total height...multiply 1/6 with 2 and the answer is 1/3. now to find the volume, multiply the values of lenght, width and height that we just calculated. the answer is 1/3, Btw i See you are a Albert fan his birthday is before mine.

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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

2 years ago

Simplify (need more charactersss)

garik1379 [7]

1/2 / 4

which can be rewritten as 1/2 * 1/4 (i bet you learnt how to divide fractions ... if you didnt then comment and ill tell you the rules for dividing)

1/2 * 1/4 = 1/8

4 0

2 years ago

What are the answers for question 1 and 2??

xeze [42]

Answer:

1) Answer: 3) $~~x = -3 \pm \sqrt{7}$

2) Answer: 3) 2 and -6

Step-by-step explanation:

1)

$(x + 3)^2 = 7$

$x + 3 = \pm \sqrt{7}$

$x = -3 \pm \sqrt{7}$

Answer: $3)~~x = -3 \pm \sqrt{7}$

2)

$2(x + 2)^2 - 4 = 28$

$2(x + 2)^2 = 32$

$(x + 2)^2 = 16$

$x + 2 = \pm \sqrt{16}$

$x + 2 = \pm 4$

$x + 2 = 4$ or $x + 2 = -4$

$x = 2$ or $x = -6$

Answer: x = 2 or x = -6

6 0

2 years ago

Read 2 more answers

Determine the value of x in the diagram

JulijaS [17]

Answer:

x = 60

Step-by-step explanation:

Consecutive angles in a parallelogram are supplementary meaning

x + 2x = 180

Then you just solve the equation

6 0

1 year ago

WILL GIVE BRAILEST<br> plz help me

Temka [501]

Answer:

The correct answer is B

If the translation is horizontal, the x-coordinates change.

If the translation is vertical, the y-coordinates change.

Step-by-step explanation:

7 0

2 years ago