Answer:
x = 5
Step-by-step explanation:
2x - 5 = 5
To solve this, we need to isolate x in all terms. First off, add 5 to both sides:
2x - 5 = 5
2x = 10
Divide 2 by both sides:
2x = 10
x = 5
Answer: 1/2
Step-by-step explanation:
Step 1: Simplify both sides of the equation.
9+3.5g=11−0.5g
9+3.5g=11+−0.5g
3.5g+9=−0.5g+11
Step 2: Add 0.5g to both sides.
3.5g+9+0.5g=−0.5g+11+0.5g
4g+9=11
Step 3: Subtract 9 from both sides.
4g+9−9=11−9
4g=2
Step 4: Divide both sides by 4.
4g/4=2/4
g=1/2
Answer:
0
Step-by-step explanation:
Answer:
There is a 75.65% probability that at least 5 teenagers in a group of 7 watched a rented movie at least once last week.
Step-by-step explanation:
For each teenager, there are only two possible outcomes. Either they watched a rented video at least once during a week, or they did not. This means that we can solve this problem using the binomial probability distribution.
Binomial probability distribution
The binomial probability is the probability of exactly x successes on n repeated trials, and X can only have two outcomes.

In which
is the number of different combinatios of x objects from a set of n elements, given by the following formula.

And p is the probability of X happening.
In this problem we have that:
The probability that a randomly selected teenager watched a rented video at least once during a week was 0.75. This means that
.
What is the probability that at least 5 teenagers in a group of 7 watched a rented movie at least once last week?
Group of 7, so
.
.
In which




So
.
There is a 75.65% probability that at least 5 teenagers in a group of 7 watched a rented movie at least once last week.