1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
tangare [24]
3 years ago
14

1. Rút gọn biểu thức A(x) = (x+2)(x+3)(x+5) - (x-1)(x+4)(x+7). Từ đó tìm tất cả các giá trị x sao cho A(x) = 0.

Mathematics
2 answers:
Contact [7]3 years ago
8 0

Answer:

778744

Step-by-step explanation:

387t98878989890

zepelin [54]3 years ago
4 0

x = -29/7

Step-by-step explanation:

A(x) = (x^2 + 5x + 6)(x + 5) - (x^2 + 3x - 4)(x + 7)

= (x^3 + 10x^2 + 31x + 30) - (x^3 + 10x^2 + 17x - 28) = 14x + 58

A(x) = 0 => 14x + 58 =0 => x = -58/14 = -29/7

You might be interested in
I need help with this problem
vitfil [10]

Answer:

all of the triangles are right triangles

6 0
3 years ago
Find the slope of the line. Write in simplest form<br> Show your work
Marina86 [1]

Answer:

The slope is -2.

Step-by-step explanation:

Following the line starting at the x intercept, move down 2 over right 1.

6 0
3 years ago
An equation was used to predict possible sales of phones for 6 months. The actual sales of phones are also listed.Actual sales 5
Vikki [24]

Answer:

20

Step-by-step explanation:

To calculate the sum of the residuals, subtract the predicted sales from the actual sales in the table below.

Actual sales 55 150 325 510 780 990

Predicted sales 40 150 300 500 800 1,000

This will show the change between them. Add each residual to find the sum.

55 - 40 = 15

150 - 150 = 0

325 - 300 = 25

510 - 500 = 10

780 - 800 = -20

990 - 1000 = -10

These add up to be 15 + 25+ 10 +-20 +-10  = 20

3 0
3 years ago
Molly is thinking of a number. twice her number take away seven is the same as her number plus five. what is her number?
777dan777 [17]

Answer:

Number = 12

Step-by-step explanation:

2n-7=n+5 (+7 to both sides)

2n=n+12 (-n to both sides)

n=12

4 0
1 year ago
The level of a lake was 8 inches below normal. It decreased 1
solmaris [256]

Answer:

-9\dfrac{5}{8} inches.

Step-by-step explanation:

The level of a lake was 8 inches below normal.

Now, it is given that the water level decreases 1\dfrac{1}{4} = 1.25 inches in June and 2\dfrac{3}{8} =2.375 inches more in July.

Therefore, the new level of water with respect to the normal level will be  

= - 8 - 1.25 - 2.375  

= - 9.625 inches

= -9\dfrac{5}{8} inches. (Answer)

4 0
3 years ago
Other questions:
  • Determine the number of solutions of 2x2 + 3x = 0.
    8·1 answer
  • What is the product 4.6(-5.2)
    10·1 answer
  • What does a variable allow you to do that you couldn't do before
    8·1 answer
  • 1. What’s the answer to this question
    5·2 answers
  • When x is 2.25, y is 6.75 y varies directly with x write the direct variation equation in the form y = kx. direct variation equa
    15·1 answer
  • The process of producing pain-reliever tablets yields tablets with varying amounts of the active ingredient. It is claimed that
    12·1 answer
  • When Eric multiplied two binomials together, his result was a trinomial. An example is
    7·1 answer
  • 6 cups is how many times as much as 24 cups?
    5·2 answers
  • Instructions: The following is the recorded earthquakes on South Carolina from August, 2016 to February, 2017. Use the data to f
    7·1 answer
  • 6 bags of Skittles cost $3. How much is one bag?
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!