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
makvit [3.9K]
2 years ago
9

[NO LINKS]

Mathematics
2 answers:
Lesechka [4]2 years ago
8 0

Answer:

  • No

Step-by-step explanation:

  • x² – 8x – 9 = 0
  • x² – 8x = 9
  • x² – 8x + 16 = 9 + 16
  • (x – 4)² = 25
  • x – 4 = 25 and x – 4 = - 25 ⇒ Incorrect, should be x - 4 = 5 and x - 4 = -5
  • x = 29 and x = -21                ⇒ Incorrect, should be x = 9 and x = -1
earnstyle [38]2 years ago
7 0

Answer:

No, it's wrong

{x}^{2}  - 8x - 9 = 0 \\ (x - 9)(x + 1) = 0 \\ x = 9 \: and \:  - 1

You might be interested in
Barrett is ordering t-shirts for his school's student council. Company D charges a
stiv31 [10]

Answer:

A. 6.25x + 30 > 9.75x+12

Step-by-step explanation:

This is because we know from the problem that x is the minimum number of t-shirts. We also know Company D charges a 6.25 fee for each tee, while Company E charges a 9.75 fee per tee.  Based on the information we know, we can choose the problem.

5 0
1 year ago
(a2·a3·(a−1))2. What is the answer
lora16 [44]

Answer: Assuming the a2 is a with an exponent of 2 and a3 is a with an exponent of 3, the answer is 2a^6-2a^5

Step-by-step explanation: the number after the ^ means to the power of

5 0
3 years ago
Let f(x) = x2 − 8x + 5. Find f(−1)
rewona [7]

Answer:

14

Step-by-step explanation:

f(x)=x^2-8x+5

now substitute x for -1

f(-1)=(-1)^2-8(-1)+5

now solve

f(-1)=1+8+5

f(-1)=14

there is your answer! hope this helps! :)

5 0
2 years ago
Read 2 more answers
What is the answer and why is it correct explain
Colt1911 [192]
Top left is you answer
7 0
2 years ago
PLEASE HELP!!!!! possible widths for a rectangular garden are 5 feet, 6 feet, and 7 feet. Leon wants the area of the garden to b
Nataliya [291]

Answer:

5

Step-by-step explanation:

3 0
3 years ago
Other questions:
  • Solve the system using the addition method.<br><br> 6x - 2y = 3<br><br> 2x + 3y = -5
    9·1 answer
  • 28 members and 50% decrease
    11·2 answers
  • 405 over 750<br> in reduced fractions
    5·1 answer
  • If tan 72=12/X find X
    11·2 answers
  • What is the solution?<br><br> −10=2a−4<br><br> a=−7<br><br> a=−3<br><br> a = 3<br><br> a = 7
    9·2 answers
  • A binomial is defined as what?
    10·1 answer
  • What are all of the x-intercepts of the continuous function in
    12·2 answers
  • The Ecology Club is electing officers for the new school year. The club will elect a president, vice-president, secretary and tr
    10·1 answer
  • Solve: √2z+3 = - z. If there are multiple solutions, list them separated by a comma, e.g., 1, 2. If there is no solution,
    13·2 answers
  • Which of the following equations have no solutions? Choose all answers that apply: ​
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!