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Talja [164]
3 years ago
15

Evaluate the expression 5x-3x for x=2

Mathematics
2 answers:
balandron [24]3 years ago
7 0

Answer:

4

Step-by-step explanation:

5x-3x

We can simplify this expression

2x

Now we can substitute x=2

2(2)

=4


dimulka [17.4K]3 years ago
5 0

x is a placeholder for a number. Think of it as a box. Inside the box, we're told that 2 is there.

So we'll replace every x with 2 and use PEMDAS

5*x - 3*x = 5*2 - 3*2 = 10 - 6 = 4

After simplifying, the answer is 4.

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Francis heard that a car stereo system was on sale for 30% off. If the sale price was $57.75, what was the original price of the
matrenka [14]

Answer:

$75.08

Step-by-step explanation:

x over 57.75 = 30 over 100

57.75 * 30

1732.5 / 100

17.325

57.75 + 17.325

75.075

Simplify = $75.08

3 0
3 years ago
12. Which two numbers whose ratio is 3 to 2 have a sum of 35? PLEASE HELP ASAP!!
Brut [27]

Answer:

14 and 21

Step-by-step explanation:

You should solve the following linear equations : \\\frac{x}{y} = \frac{3}{2}\\ x+y=35

3 0
3 years ago
Area model to represent the expression for 22 x 20
IgorLugansk [536]
Well the answer would have to be 440
8 0
3 years ago
The GOAL of solving equations is to get the variable by itself on one side of the equation and a number on the other side of the
trasher [3.6K]
To do this you need to isolate the variable using PEMDAS?
PEMDAS is solving an equation by taking parenthesis first, or exponents, multiplication, division, addition, or subtraction...

8 0
3 years ago
Mrs Fernandez has a total of 156 red and blue roses. After selling the same number of red and blue roses, she had 1/3 of the num
hodyreva [135]

The number of blue roses will be 72. Then the number of red roses that she have at first is 84.

<h3>What is the linear system?</h3>

A linear system is one in which the parameter in the equation has a degree of one. It might have one, two, or even more variables.

Mrs Fernandez has a total of 156 red and blue roses.

After selling the same number of red and blue roses.

She had 1/3 of the number of red roses and 2/9 of the number of blue roses left.

Let x be the number of red rose and y be the number of blue roses.

Then the equation will be

x + y = 156  ...1

2x/3 = 7y/9

   6x = 7y ...2

By solving the equations 1 and 2, we have

x = 84 and y = 72

Then the number of red roses that she have at first is 84.

More about the linear system link is given below.

brainly.com/question/20379472

#SPJ1

8 0
2 years ago
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