3 years ago

9. Find the length of X (in the picture) plssss I need help. (GIVING POINT'S AND BRAINLY)

Mathematics

1 answer:

wlad13 [49]3 years ago

6 0

Answer:

$\frac{7.5}{x } = \frac{6}{4} \\ 6x = 30 \\ x = 5$

You might be interested in

5. Ms. Peregrino is using her cards to call on

Ira Lisetskai [31]

Answer: 2/34

Step-by-step explanation: there are 2 sticks with the same name and the total number of students are 34 so its 2/34

7 0

2 years ago

The measure of an exterior angle at n measures 99�. m�l � __1 3 x� and m�m � __2 3 x�. find m�l, m�m, and m�lnm.

kirill [66]

You should ask your parent/guardian
or teacher if needed! Merry Christmas!

8 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

5/16=n/16 help please

Vsevolod [243]

Both have the same denominator
Remove the denominator
5=n

3 0

3 years ago

Read 2 more answers

Plz help me. will give brainliest!!

Nesterboy [21]

Answer:

1. 110

2. 84

Step-by-step explanation:

6 0

2 years ago

9. Find the length of X (in the picture) plssss I need help. (GIVING POINT'S AND BRAINLY)​

9. Find the length of X (in the picture) plssss I need help. (GIVING POINT'S AND BRAINLY)