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
Lelechka [254]
3 years ago
10

Factor completely x³ - 7x² + 2x + 40 given x = -2 is a root.

Mathematics
1 answer:
klemol [59]3 years ago
6 0

Answer:

  (x +2)(x -4)(x -5)

Step-by-step explanation:

When you divide the cubic by (x +2), the factor that has -2 as a root, you get a quadratic with roots 4 and 5. Thus the factors are ...

  (x +2)(x -4)(x -5)

___

In the attachment, we have done the division using a graphing calculator. You can also do it by polynomial long division or by synthetic division. The resulting quadratic is ...

  x^2 -9x +20 = (x -4)(x -5) . . . . . factor the quadratic

You might be interested in
WILL MARK U AS BRAINLIEST PLZ HELP
Radda [10]

Answer:

112 if you don't include the triangle sides as they are not necessary, but 124 if you include one triangle and 136 if you include both triangle sides

5 0
2 years ago
Alaina has $28 in her account. She wants to purchase a pair of shoes that cost $45. If Alaina makes the purchase, which integer
muminat

Answer:

-17

Step-by-step explanation:

You subtract $45 from $28 and get a negative number

4 0
3 years ago
According to the Statistical Abstract of the United States, in 2000, 10.7% of Americans over 65 years of age use the Internet. A
Dvinal [7]

Answer:

H0 : μ = 0.107

H1 : μ ≠ 0.107

Step-by-step explanation:

The claim is the alternative hypothesis. H1 ; which is a researcher's opinion that the proportion of Americans aged 65 and above using the internet as changed from the mean value of 10.7% (0.107). The direction of the change is not given, hence. We cannot use the greater or less Than sign as the direction of the change isn't specified by the researcher or data Given. Hence, the shift could be either to the right or left. Hence, the use of the equal to and not equal to sign.

The null will oppose the alternative hypothesis and take the stance that the proportion hasn't changed from the initial mean.

4 0
2 years ago
What is the answer to y=-x/2+5/2
ololo11 [35]

Answer:

x=5

Step-by-step explanation:

y= -x/2 + 5/2

substitute y=0

0= -x/2 + 5/2

solve the equation

x=5

7 0
2 years ago
Look at this rectangle
Stolb23 [73]

the new area will be three times the old area

8 0
3 years ago
Other questions:
  • Is 1/5 a repeating decimal​
    6·2 answers
  • Which answer is equal to the quotient in the expression below?
    10·1 answer
  • Which property is illustrated by the following statement? . Angle X = Angle Y and Angle Z = Angle Y, so Angle X = Angle Z. A.Sym
    5·1 answer
  • What is the vertex of f(x)=5^2+20-16
    10·1 answer
  • A teacher divides her class into groups and assigns each group the task of measuring the mass of the same object three times. Th
    8·1 answer
  • Solve for x show all your work. 10x + 15 = 5x - 10​
    12·1 answer
  • Expand the expression: 3ln2x+lnx-ln17
    8·2 answers
  • True or False: Proportional relationships are a type of nonlinear function.
    5·1 answer
  • Help pls if u can pls
    11·1 answer
  • PLS HELP ASAP WILL GIVE BRAINLIEST AND 100 POINTS
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!