Answer:78%
Step-by-step explanation:
divide 25 by 32
then round 0.78125 to 0.78
move the decimal 2 places giving you 78%
Answer:
x = -4
Step-by-step explanation:
1/6(6x−12)=−13−(x−3)
Distribute
x -2=−13−x+3
Combine like terms
x-2 = -x-10
Add x to each side
x-2+x = -x-10+x
2x-2 = -10
Add 2 to each side
2x-2 +2 = -10+2
2x = -8
Divide by 2
2x/2 = -8/2
x = -4
Try b djdjwkkwkwkwkwwkwk ( I needed 20 characters)
Answer:
mean = 1 power failure
variance = 1 (power failure)²
Step-by-step explanation:
Since the mean is computed as
mean = E(x) = ∑ x * p(x) for all x
then for the random variable x=power failures , we have
mean = ∑ x * p(x) = 0 * 0.4 + 1* 0.3 + 2*0.2 + 3* 0.1 = 1 power failure
since the variance can be calculated through
variance = ∑[x-E(x)]² * p(x) for all x
but easily in this way
variance = E(x²) - [E(x)]² , then
E(x²) = ∑ x² * p(x) = 0² * 0.4 + 1²* 0.3 + 2²*0.2 + 3²* 0.1 = 2 power failure²
then
variance = 2 power failure² - (1 power failure)² = 1 power failure²
therefore
mean = 1 power failure
variance = 1 power failure²
Step-by-step explanation:
9x2+5x4
= 18 + 20
= 38
the answer is 38