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artcher [175]
3 years ago
6

How do I solve 10x-3(7-2x)+18

Mathematics
2 answers:
kiruha [24]3 years ago
8 0
10x-(3x7-3x2x)+18
10x-(21-3x2x)+18
10x-(21-6x)+18
10x-21+6x+18
16x-21+18
16x-3
ra1l [238]3 years ago
8 0
First, we need to reduce the equation. To do this, we need to get rid of the parentheses. I'll start with that.

Remember that subtracting 10X-3 is the same as adding a negative number. 10X+(-3) Thus, we change the equation.

10X+(-3)(7-2X)+18

Now we multiply -3 and 7-2X. We must distribute because of the parentheses around 7-2X.

10X+[(-3)(7)+(-3)(-2X)]+18

10X+(-21)+(6X)+18

Now, we add like terms.

10X+6X+(-21)+18

16X+(-3)

16X-3

Now, if you only needed to reduce the equation, then you can stop here.

However, if the equation is equal to zero, and you need to solve for X, then you need to add 3 to both sides so that X is by itself.

16X-3+3=0+3

16X=3

Now decide both signs by 16 to solve for X.

16X/16=3/16

X=3/16

X=0.1875
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Answer:

they would make $25,500

Step-by-step explanation:

6,800/400=17

1,500*17=25,500

<em>answer</em><em> </em>:$25,500

8 0
3 years ago
In your own words, explain 3 or more sentences "how do you multiply rational number?" Tell how the signs, negative and positive,
vagabundo [1.1K]

Answer:

Rules & Examples of Integers multiplication.

Step-by-step explanation:

A rational number  is a number that can be expressed as a fraction of integers (positive or negative numbers). Every integer is a rational number.

They are multiplied based on following rules :

  • Positive (+) x Positive (+) = Positive (+) , +2 x +2 = 4
  • Positive (+) x Negative (-) = Negative (-) , +2 x -2 = -4
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8 0
3 years ago
Read 2 more answers
At the city Museum child admission is $5.30 and adult admission is $9.30 on Sunday 146 tickets were sold for a total sales of $1
DerKrebs [107]

Answer:

The number of child tickets is 53

And adult tickets sold out is 93

Step-by-step explanation:

Let the child tickets be x

And the adult tickets be y

x+y = 146 - - - - - - - 1

x= 146-y

5.3x + 9.3y= 1145.80 - - - - - 2

We can substitute x= 146-y in equation 2

5.3(146-y) + 9.3y= 1145.80 - -- 2

773.8 - 5.3y +9.3y = 1145.80

773.8+4y= 1145.80

4y= 1145.80-773.8

4y= 372

y= 372/4

y= 93

We can now substitute y= 93 in equation 1 to find x

x+ 93= 146

x= 146-93

x= 53

Hence

The number of child tickets is 53

And adult tickets sold out is 93

6 0
3 years ago
What is the cost of gas at 4.6 $2.70 per gallon
Anarel [89]

Answer:

$12.42

Step-by-step explanation:

4.6 gallons at 2.70 per gallon.

4.6*2.70= $12.42

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3 years ago
Find f(4) please, I need help
mixer [17]

Answer:

f(4) = 1

Step-by-step explanation:

f(4) = what?

So if we know that x, aka 4, is technicially f is greater then 2, so you can plug in x as 4. So that means 5(4) - 19 = 20 - 19 = 1, so f(4) = 1

7 0
3 years ago
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