Transforming

to

gives the effect of squashing the graph horizontally (by halving the x-coordinate)
Then from

to

is reflecting on the y-axis
Then from

to

is to translate by 4 units to the right
Finally from

to

is translating the graph up by 5 units
Answer:
(5a+4c)(2a-b)
Explanation:
Given the expression:

First, group the expression into two:

• In the first group, 5a is a common factor.
,
• In the second group, 4c is a common factor.
Factor these out by dividing each term by the GCF of each group.

Since the terms inside the brackets are the same, combine:

CHECK
To check if your result is correct in cases like these, expand as follows:

Our result is the same as the original question, hence, the work is correct.
Answer:
x = 8, y = -5
Step-by-step explanation:
Multiplying the 2nd equation by 3, we get -3x-9y = 21. Then eliminating with the first equation we get -5y = 25. y = -5. Substituting this into the original equation, we get x = 8.
Step-by-step explanation:
STEP
1
:
Equation at the end of step 1
((22•3x2) - 10x) + 5 = 0
STEP
2
:
Trying to factor by splitting the middle term
2.1 Factoring 12x2-10x+5
The first term is, 12x2 its coefficient is 12 .
The middle term is, -10x its coefficient is -10 .
The last term, "the constant", is +5
Step-1 : Multiply the coefficient of the first term by the constant 12 • 5 = 60
Step-2 : Find two factors of 60 whose sum equals the coefficient of the middle term, which is -10 .
Answer:
16.78% probability that exactly 12 of them use their smartphones in meetings or classes.
Step-by-step explanation:
For each adult, there are only two possible outcomes. Either they use their smartphone in meetings or classes, or they do not. The probability of a person using their phone in meetings or classes is independent of any other person. So we use the binomial probability distribution to solve this question.
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 combinations of x objects from a set of n elements, given by the following formula.

And p is the probability of X happening.
64% use them in meetings or classes.
This means that 
20 adult smartphone users are randomly selected
This means that 
Probability that exactly 12 of them use their smartphones in meetings or classes.
This is P(X = 12).


16.78% probability that exactly 12 of them use their smartphones in meetings or classes.