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timofeeve [1]
3 years ago
11

Why can a variable be used to represent a number

Mathematics
1 answer:
irina [24]3 years ago
6 0

Variables can be used to represent unknown numbers in a equation or expression that you will later find out what they are
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Write the equation of the line that has a slope of 3 and passes through (5, 11)
Marina CMI [18]

Answer:

3x-4

Step-by-step explanation:

y=ax+b general type of the line

a is the slope

y=3x+b

put 5 instead of the x and put 11 instead of the y

11=15+b

b=(-4)

Equation is 3x-4

4 0
3 years ago
The average annual salary of the employees of a company in the year 2005 was $70,000. It increased by the same factor each year
dezoksy [38]
We can make use of the general formula for the geometric series to generate the function representing the average annual salary.
an = a0(r)^(n-1)

Or
f(x) = a0(r)^(x - 1)

Plugging in the given values for the year 2005 and 2006 to ge the value of r.
82000 = 70000 (r)^(1-1)
r = 1.1714

Therefore, the function is:
f(x) = 70,000 (1.1714)^(x-1)
3 0
3 years ago
Read 2 more answers
Which of the following is a singleton set?​
aleksandrvk [35]

Step-by-step explanation:

2 option is the answer.

hope it helps

5 0
3 years ago
Read 2 more answers
Out of 28 cookies, 3/4 are chocolate chip. How many cookies are chocolate chip?
Leviafan [203]

21 out of 28 cookies are chocolate chip

3 0
3 years ago
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Find x and y so that the quadrilateral is a parallelogram.
sergiy2304 [10]

Answer:

Result:

  • The value of x = 12
  • The value of y = 21

Step-by-step explanation:

Given

The parallelogram DEFG

DE = 6x-12

FG = 2x+36

EF = 4y

DG = 6y-42

We know that the opposite sides of a parallelogram are equal.  

As DE and FG are opposite sides, so

DE = FG

substituting DE = 6x-12 and FG = 2x+36 in the equation

6x-12 = 2x+36

6x-2x = 36+12

simplifying

4x = 48

dividing both sides by 4

4x/4 = 48/4

x = 12

Therefore,

The value of x = 12

Also, EF and DG are opposite sides, so

EF = DG

substituting EF = 4y and DG = 6y-42 in the equation

4y = 6y-42

switching sides

6y-42 = 4y

6y-4y = 42

2y = 42

dividing both sides by 2

2y/2 = 42/2

y = 21

Therefore,

The value of y = 21

Result:

  • The value of x = 12
  • The value of y = 21
3 0
3 years ago
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