Answer:
6+12y
Step-by-step explanation:
first, distribute the 2 to the parenthesis:
-multiply the 2 to the 3 and 6y
We get 6+12y
hope this helps :)
Answer:
the apprentice can complete the job in 30 hours by working alone.
Step-by-step explanation:
Given:
Number of hours required to complete a job by welder = 18 hours
Number of hours welder work on job = 6 hours.
Number of hours required by apprentice to complete the job = 14 hours
We need to find Number of hours required to complete a job by apprentice alone.
Solution:
Let Number of hours required to complete a job by apprentice alone be 'a'.
Also let the job completed be = 1
Now we know that ;
Time required on job is equal to sum of Number of hours welder work on job and Number of hours required by apprentice to complete the job.
framing in equation form we get
Time required on job = 
Now we can say that;
each has done a fraction of the work so we will add to two fraction as number of hours of work done by Total number of hours required to do the work to complete 1 job.
so we can frame the equation as;

By reducing the fraction we get;

Now we will make the denominator common to solve the fraction we get;

Now denominators are same so we will solve the numerator we get;

Multiplying both side by 3a we get;

Combining the like terms we get;

Dividing both side by 2 we get;

Hence the apprentice can complete the job in 30 hours by working alone.
Answer:
B
Step-by-step explanation:
The set {(1, 2), (2, -3), (3, 4), (4, -5)} represents y as a function of x
Question 2:
The best statement describes the relation is "The relation represents y as a function of x, because each value of x is associated with a single value of y" ⇒ 3rd answer
Question 4:
There are missing options so we can not find the correct answer
Question 5:
The sets {(1 , 1), (2 , 2), (2 , 3)} and {(1, 2), (1, 3), (1, 1)} do not represent y as a function of x ⇒ 1st and 4th answers
Step-by-step explanation:
The relation is a function if each value of x has ONLY one value of y
Ex: The set {(3 , 5) , (-2 , 1) , (4 , 3)} represents y as a function of x because x = 3 has only y = 5, x = -2 has only y = 1, x = 4 has only y = 3
The set {(4 , 5) , (-2 , 1) , (4 , 3)} does not represent y as a function of x because x = 4 has two values of y 5 and 3