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Korolek [52]
3 years ago
13

I need help with this math problem! Thanks! -8 = -( x +4)

Mathematics
1 answer:
Damm [24]3 years ago
7 0

Answer:

x = 4

Step-by-step explanation:

If the lonely negative sign infront of the brackets is confusing, it can be rewritten as -1.

To solve, simplify by expanding then isolate x.

-8 = -( x +4)

-8 = -1 ( x +4)       Distribute over brackets by changing the each term's sign

-8 = -x - 4            Start isolating x by moving everything to the other side

-8 +4  = -x -4 + 4        Add 4 to both sides so it cancels out on the right

-4  = -x

-4  = -1x           <= -x is the same at -1x

-4/-1  = -x/-1     <=divide both sides by negative 1

4 = x

x = 4      <= usually we write the variable on the left side

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Which number line represents the solution set for the inequality 3(8 – 4x) &lt; 6(x – 5)?
timofeeve [1]

Answer: Choice B

Open circle at 3. Shading to the right

========================================================

Work Shown:

3(8 - 4x) < 6(x - 5)

24 - 12x < 6x - 30

24 + 30 < 6x + 12x

54 < 18x

18x > 54

x > 54/18

x > 3

We use an open circle at 3 to indicate we don't include this endpoint as part of the solution. The solution set is everything larger than 3, so we shade to the right of this open circle.

4 0
3 years ago
Combine like terms <br> 4x+3(2x+5b)-4b-2x+6
Ahat [919]

Answer:

  • \boxed{\sf{8x+11b+6}}

Step-by-step explanation:

To solve this problem, you have to combine like terms of x and b from one side of the equation.

<h3>4x+3(2x+5b)-4b-2x+6</h3>

<u>Combine like terms.</u>

3(2x+5b)+4x-2x-4b+6

<u>Solve.</u>

4x-2x=2x

Rewrite the problem down.

3(2x+5b)+2x-4b+6

Expand the form.

Use a distributive property.

<u>Distributive property:</u>

A(B+C)=AB+AC

3(2x+5b)

<u>Multiply.</u>

3*2x=6x

3*5b=15b

<u>Rewrite the problem.</u>

6x+15b

6x+15b+2x-4b+6

<u>Combine like terms.</u>

6x+2x+15b-4b+6

<u>Add the numbers from left to right.</u>

6x+2x=8x

8x+15b-4b+6

<u>Then, you add again.</u>

15b-4b=11b

<u>= 8x+11b+6</u>

  • <u>Therefore, the final answer is 8x+11b+6.</u>

I hope this helps you! Let me know if my answer is wrong or not.

4 0
2 years ago
Read 2 more answers
Can somebody pls help me!! :(( it’s due today
Lemur [1.5K]

Answer: $4110.8 (more likely - 95% sure) or $2,107 (less likely)

Step-by-step explanation: It could be $4110.8 because you have the take the total they made and subtract is from the cost of the toys ($7,230-$2,450=$4,780). Then you have to take the result of that and get 14% of it, then subtract that from the $4,780 amount. Then you get the final answer which is $4110.8.

<u />

However, it could also be $2,107 because the question itsn't that clear in the second sentence. It could be saying that $2,450 is the price of the toys (which is what I assumed above), or that it is the profit that the $2,450 (which I used below). I think that the above answer is more likely because if not then the first number would never be used. Anyways here is the second way it could be.

Step-by-step explanation: It could be $2,107 because you take the profit ($2,450) and get 14% of it, then subtract that from the $2,450 amount. Then you get the final answer which is $2,107.

If I was you, I would do the first one ($4110.8) because I really think it is that one. I just put the other one here just in case.

6 0
3 years ago
kara opened a savings account with $8,000. she makes no changes to this account after 2 years. her account has a compound intere
olga_2 [115]

Answer:628384729

Step-by-step explanation:

One two three

7 0
3 years ago
At which points does the graph of f(x)=2x−4 cross the x-axis and y-axis?
blagie [28]

crosses x-axis at (2, 0 ) and y-axis at (0, - 4 )

To find where the graph crosses the x and y axes ( intercepts )

• let x = 0, in the equation for y- intercept

• let y = 0, in the equation for x- intercept

x = 0 : y = 0 - 4 = - 4 ⇒ (0, - 4 )

y = 0 : 2x - 4 = 0 ⇒ 2x = 4 ⇒ x = 2 ⇒ (2, 0 )


6 0
3 years ago
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