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Scilla [17]
4 years ago
9

X+3x-2=6x-12 please help

Mathematics
1 answer:
igomit [66]4 years ago
5 0

x + 3x - 2 = 6x - 12 \\4x - 2 = 6x - 12 \\  - 4x \:  \:  \:  \:  \:  \:  \:  \:  - 4x \\  - 2 = 2x - 12 \\  + 12 \:  \:  \:   \:  \:  \:  \:  \:  \: + 12  \\ 10 = 2x \\  \div 2 \:  \:  \:  \div 2 \\ 5 = x \\ check \\ x + 3x - 2 = 6x - 12 \\ 5 + 15 - 2 = 30 - 12 \\ 18 = 18
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Thanks for the answer
iragen [17]

Answer:

12 books

Step-by-step explanation:

30 multiply by 2/5=12 books that were sold to co-workers.

3/5 which is the remainder multiplied by 1/2 =3/10

3/10 multiply by 30 =6 books sold to her neighbours

now that 30 is the original subtract12 +6

4 0
2 years ago
Need help now due today
san4es73 [151]

a) The variable in the inequality is <u>x.</u>

b) The inequality symbol needed <u>< ( or >)</u>

c) The constant is <u>8.</u>

d) The inequality is <u>f(x)<8x .</u>

Step-by-step explanation:

Given,

The person can make less than $8 per hour

To find the correct inequality for this situation.

Let us take,

The person works for x hours.

If the total income of the person for x hours is f(x)

Then, the inequality will be

f(x)<8x

3 0
3 years ago
Tasha says that the expression 6.8w-4.7 can be simplified as 2.1w. Her teacher explains that this is not correct. What mistake d
tatuchka [14]

Answer: She combined unlike terms.

Step-by-step explanation:

You can only combine like terms. If a number has a variable, you must make sure that the number you're operating it with has the same variable raised to the same power (if applicable)

6.8w-4.7 is in its simplest form.

To be able to subtract these, 4.7 must have a ''w'' variable as follows;

6.8w-4.7w=2.1w

7 0
3 years ago
Check my work??? I will add a picture plz tell me if im right its worth 50 points!!
kkurt [141]

yes it's the right answer

6 0
3 years ago
Which of the following equations is of a parabola with a vertex at (3, 0)?
bixtya [17]

Answer:

D. y = (x - 3)²

Step-by-step explanation:

The parabola formula in vertex form is:

y = a(x - h)² + k

where the vertex is located at (h, k). Replacing with vertex (3, 0) we get:

y = a(x - 3)² + 0

y = a(x - 3)²

In all possible options the leading coefficient <em>a</em> is equal to one. Therefore:

y = (x - 3)²

7 0
3 years ago
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