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r-ruslan [8.4K]
2 years ago
9

How to evaluate this expression -3 . (6 + 4 . 2)

Mathematics
1 answer:
lilavasa [31]2 years ago
4 0

Answer:

9

Step-by-step explanation:

All you have to do is follow this order while working a problem!

Example 1:

If a = 4 and b = 5, what is ab – 2b?

Since there are no parentheses or exponents,

you first plus in the values for a and b and multiply those together.

(4 ´ 5) You get 20.

Then, you multiply 2b or (2 ´  5 )which gives you 10.

Last, you subtract the second answer from the first (20 -10),

which gives you 10!

Example 2:

Evaluate 6x / 4 when x = 6.

Because multiplication and division are equal in the order of operations, you solve the problem by reading it from left to right like one would read a book.

6 x 6 = 36.

You then divide that number by 4.

The correct answer is 9.

(clip art was taken from http://www.kidsdomain.com/holiday/school/clip.html)

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Write a linear equation to represent this
Elena L [17]
I think is Y=5x+20
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3 0
3 years ago
The sum of two numbers is 59 and the difference is 15 . what are the numbers?
UkoKoshka [18]
Write a system of equation based on the number
For an instance, the two numbers are a and b.
"The sum of two numbers is 59" can be written as follows.
⇒ a + b = 59  <em>(first equation)
</em>"The difference is 15" can be written as follows.
⇒ a - b = 15  <em>(second equation)</em>

Solve the system of equation by elimination/substitution method.
First, eliminate b to find the value of a.
a + b = 59
a -  b = 15
--------------- + (add)
2a     = 74
  a     = 74/2
  a     = 37

Second, substitute 37 as a in one of the equations
a + b = 59
37 + b = 59
b = 59 - 37
b = 22

The numbers are 37 and 22
5 0
3 years ago
I need the answer to the problem
Nookie1986 [14]

4/9 x 7/4 = 28/36 = 7/9

Answer is 7/9

7 0
3 years ago
Read 2 more answers
What is 3x²+5x+25 when x equals 3
Ksivusya [100]

Answer: 67

Step-by-step explanation:

3x^2 + 5x + 25

x = 3

3(3)^2 + 5(3) + 25

3^2 = 9

3(9) + 5(3) + 25

3 * 9 = 27

27 + 5(3) + 25

5 * 3 = 15

27 + 15 + 25

27 + 15 = 42

42 + 25 = 67

8 0
3 years ago
Read 2 more answers
Wich algebraic expression represents ”forty times a number”?<br><br> 40+n<br> 40n<br> n-40<br> 40/n
Reika [66]
The answer to the problem is 40n
4 0
3 years ago
Read 2 more answers
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