3 years ago

Can anyone help me with this?

Mathematics

1 answer:

Nostrana [21]3 years ago

6 0

X is equal to 8
Y is equal to 19

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Apply the distributive property to factor out the greatest common factor of 12+20

Lunna [17]

4(3+5) --> this means that 12/4=3 and 20/4=5 and 4 is the GCF

3 0

3 years ago

In a cartons of bulbs, 90% contain no defective bulbs, 5% contain one defective bulb, 3% contain two defective bulbs, and 2% con

hodyreva [135]

Answer:

Mean, E(x) = 0.17

Variance, V(x) = 0.12

Step-by-step explanation:

90% contains no defective bulbs, P(X=0) = 0.9

5% contain one defective bulbs, P(X=1) = 0.05

3% contain two defective bulbs, P(X=2) = 0.03

2% contain three defective bulbs, P(X=3) = 0.02

The mean for the number of defective bulbs:

$E(X) = \sum XP(X)\\E(X) = (0*0.9) + (1*0.05) + (2*0.03) + (3* 0.02)\\E(X) = 0 + 0.05 + 0.06 + 0.06\\E(X) = 0.17$

Variance for the defective bulbs:

$V(x) = (\sum x^{2}P(x) ) - \mu^2$

$\sum x^{2}P(x) = (0^2*0.9) + (1^2*0.05) + (2^2*0.03) + (3^2* 0.02)\\\sum x^{2}P(x) = 0.05 + 0.12 + 0.12\\\sum x^{2}P(x) = 0.29$

V(x) = 0.29 - 0.17

V(x) = 0.12

7 0

3 years ago

The square of the sum of x and -3 is equal to y how can turn this problem into a numbers

ollegr [7]

The equation:

x2 - 3 = y

3 0

3 years ago

a piece of lumber leans against a wall. the top of this 40 foot piece of lumber touches a point on the wall that is 36 feet abov

nignag [31]

So first find the distance from the bottom of the lumber to the wood
40^2= 36^2+X^2
X=304^1/2. Or the sqaure root of 304

The you use the sin equation

Sin90*\40= sin(unknown angle)/304^1/2
Sinx(x) = ((304^1/2)xsin(90))/40
X=arcsin((304^1/2)xsin(90))/40

8 0

3 years ago

10:28

maxonik [38]

I don’t get what your trying to ask.....

5 0

3 years ago

Can anyone help me with this?​

Can anyone help me with this?