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
GenaCL600 [577]
3 years ago
8

Mathematicians 4: Who is Who?

Mathematics
1 answer:
larisa86 [58]3 years ago
6 0

Answer:

a. x = -9 or x = -2

b. -5(x - 4)

c. x = -3 or x = 5

d. x = ±7

Step-by-step explanation:

a. First person;

y = x² + 11x + 18

y = x² + 9x + 2x + 18

y = x(x + 9) + 2(x + 9)

y = (x + 9)(x + 2)

y = x = -9 or x = -2

b. Second person;

y = -5x + 20

The common factor is 5.

y = -5(x - 4)

c. Third person;

y = x² - 2x - 15

y = x² - 5x + 3x - 15

y = x(x - 5) + 3(x - 5)

y = (x + 3)(x - 5)

y = x = -3 or x = 5

d. Fourth person;

y = x² - 49

Applying the difference of squares formula;

(a² - b²) = (a - b)(a + b)

y = x² - 49 = x² - 7² = (x - 7)(x + 7)

y = (x - 7)(x + 7)

y = x = ±7

You might be interested in
When would a set of data be described as variable?
valina [46]
I guess when the data isn't consitant

8 0
3 years ago
The age of a father is 2 less than 7 times the age of his son. In 3 years, the sum of their ages will be 52. If the son’s presen
s2008m [1.1K]

Answer:

First,

the age of the son: s

the age of the father is 2 less than 7 times the age of his son: 7s - 2

In 3 years, the sum of their ages will be 52, In 3 years, the age of the sun will

increase 3, so s+3. Also, the age of his

father also increase 3, (7s-2)+3

(s+3)+ [(7s-2)+3] = 52 is the equation.

5 0
2 years ago
Read 2 more answers
Lindy has 64 vanilla wafer cookies to put in bags. How many bags can she fill if she puts the same number in each bag and uses t
kvv77 [185]
1 bag of 64
2 bags of 32
4 bags of 16
Or 8 bags of 8
5 0
3 years ago
What is 8.239 round to the tenths place
Karolina [17]
8.2
3 does not add 1 to 2 so it's 8.2
5 0
3 years ago
What is 3,000 subtracted from 1/10
nadezda [96]
The answer to your question is -2999.9HOPED I HELPED!
4 0
3 years ago
Read 2 more answers
Other questions:
  • 125 is 25% more than what number?<br> Your answer
    9·1 answer
  • Solve.<br><br> 9.4 = - t/3.5<br><br> t =
    14·1 answer
  • Outcome A B C D
    9·2 answers
  • A car travels 210 miles in 4 hours. Use dimensional analysis to convert the car’s speed to feet per minute?
    8·2 answers
  • Which is a better buy? A large pizza with a 16-inch diameter for $15.00 or a medium pizza with an 8-inch diameter for $7.50?
    12·1 answer
  • Need help with this ASAP also have more questions on my account to if you guys could help me it’d be really appreciated
    12·2 answers
  • Given that 9x – 8y = 16
    13·1 answer
  • The principle <br><br>P=6000 A=6810 T=3 years
    14·2 answers
  • Can someone just check my answers please? Please let me know which questions are wrong. Thank you for your time.
    5·2 answers
  • The value of the ___________ is used to estimate the value of the population parameter.
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!