Answer:
9
Step-by-step explanation:
To remove (-6) from the brackets, two minuses (negatives) cancel each other out becoming a plus (positive).
Example:
3 - (-6) = 3 + 6 = 9
*tip: if you see "- (-" imagine it automatically become a +*
Did you plug it into your calculator? That's a great place to start.
Answer:
- Cost is Increasing at a rate of 20,000 per week
- Revenue is decreasing at a rate of 100,000 per week
- Profit is decreasing at a rate of 120,000 per week
Step-by-step explanation:
The cost, revenue, and profit equations for a company manufacturing calculators are given below:
- Cost, C=90000+40x
- Revenue,

- Profit = R - C
When Production output x=4000
<u />
<u>Change in Cost</u>
Cost, C=90000+40x

<u>Change in Revenue</u>

<u>Change in Profit</u>

Therefore, when production output is 4000 and increasing at a rate of 500 calculators per week,
- Cost is Increasing at a rate of 20,000 per week
- Revenue is decreasing at a rate of 100,000 per week
- Profit is decreasing at a rate of 120,000 per week
The number is -9
Step-by-step explanation:
Let x be the number then according to given statement

Subtracting 10 from both sides

Subtracting x from both sides

Dividing both sides by 3

<u>Verification:</u>

The number is -9
Keywords: Linear equation, variables
Learn more about linear equation at:
#learnwithBrainly
First get all the terms on the same side:

Now solve using the quadratic formula which is:

Plug in the values:

So the answer is: