3•7=21 if times three times seven it equals twenty one
Answer:
Probability that 10 of them plan to vote against this piece of proposed legislation is 0.0701 or 7.01 %.
Step-by-step explanation:
Consider the event of voting against the piece as success, 'p'. So, voting in favor of the piece is failure and denoted by 'q'.
Given:
Sample size is, 
Probability of failure is, 
Therefore, probability of success is, 
Number of successes is, 
Now, from Bernoulli's distribution, probability of 
successes out of 
samples is given as:
Here, 
. Therefore,
Therefore, probability that 10 of them plan to vote against this piece of proposed legislation is 0.0701 or 7.01 %.
The correct expression that is equivalent to the algebraic expression -5x - 15 + 25x - 30 is -5(-4x + 9).
<h3>How to determine the equivalent expression</h3>
We shall simplify the given algebraic expression by carrying out basic mathematics operations as follows;
Given: -5x - 15 + 25x - 30
we group like terms together
25x - 5x - 15 - 30
20x - 45
the number 5 is a common factor of 20x and 45, so we have that;
5 × 4x - 5 × 9
by factoring out 5
5(4x - 9)
also;
5(4x - 9) = -5(-4x + 9)
Therefore, -5(-4x + 9) is an equivalent expression to the algebraic expression -5x - 15 + 25x - 30
Learn more about equivalent expression here: brainly.com/question/24734894
#SPJ1
4 to the power of negative two beacause u add the exponents 6+ negative 8
