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
Zarrin [17]
3 years ago
10

I really need help with this pls help me

Mathematics
2 answers:
nexus9112 [7]3 years ago
7 0

9514 1404 393

Answer:

  (a)  -2

Step-by-step explanation:

Put -1 where x is and do the arithmetic.

  f(x) = x³ +2x² -3

  f(-1) = (-1)³ +2(-1)² -3

  f(-1) = -1 +2 -3 = 1 -3

  f(-1) = -2

Agata [3.3K]3 years ago
6 0
I think it is the first one -2
You might be interested in
How many degrees does the earth revolve on its axis each hour? How many radians?
mestny [16]

Answer:

The earth will revolve 15° and 0.0833 radian in 1 hour              

Step-by-step explanation:

We know that earth revolve one round on its axis 24 hour

We know that 1 round = 360°

So earth will revolve 360° in 24 hour

So earth will revolve \frac{360}{24}=15^{\circ} in 1 hour

Now we have to find the revolution in radian

So 15^{\circ}=15\times \frac{\pi }{180}=0.0833\pi

3 0
3 years ago
51 and 53 HELP PLS!!!!!!!
Gelneren [198K]
Hi!
Answers:

51. w=9/4

53. b=12
5 0
2 years ago
PLEASE HELP
jeka57 [31]

Answer:

x=3.5

Step-by-step explanation:

3 0
2 years ago
Read 2 more answers
Twenty years ago a small town in Texas had a population of 10,000. The population has increased 8% each year
yan [13]

Answer:

A

Step-by-step explanation:

8% = .08 in decimal form

10 000 ( 1 + .08)^10 =

8 0
2 years ago
Which of the following sets are subspaces of R3 ?
Ratling [72]

Answer:

The following are the solution to the given points:

Step-by-step explanation:

for point A:

\to A={(x,y,z)|3x+8y-5z=2} \\\\\to  for(x_1, y_1, z_1),(x_2, y_2, z_2) \varepsilon A\\\\ a(x_1, y_1, z_1)+b(x_2, y_2, z_2) = (ax_1+bx_2,ay_1+by_2,az_1+bz_2)

                                        =3(aX_l +bX_2) + 8(ay_1 + by_2) — 5(az_1+bz_2)\\\\=a(3X_l+8y_1- 5z_1)+b (3X_2+8y_2—5z_2)\\\\=2(a+b)

The set A is not part of the subspace R^3

for point B:

\to B={(x,y,z)|-4x-9y+7z=0}\\\\\to for(x_1,y_1,z_1),(x_2, y_2, z_2) \varepsilon  B \\\\\to a(x_1, y_1, z_1)+b(x_2, y_2, z_2) = (ax_1+bx_2,ay_1+by_2,az_1+bz_2)

                                             =-4(aX_l +bX_2) -9(ay_1 + by_2) +7(az_1+bz_2)\\\\=a(-4X_l-9y_1+7z_1)+b (-4X_2-9y_2+7z_2)\\\\=0

\to a(x_1,y_1,z_1)+b(x_2, y_2, z_2) \varepsilon  B

The set B is part of the subspace R^3

for point C: \to C={(x,y,z)|x

In this, the scalar multiplication can't behold

\to for (-2,-1,2) \varepsilon  C

\to -1(-2,-1,2)= (2,1,-1) ∉ C

this inequality is not hold

The set C is not a part of the subspace R^3

for point D:

\to D={(-4,y,z)|\ y,\ z \ arbitrary \ numbers)

The scalar multiplication s is not to hold

\to for (-4, 1,2)\varepsilon  D\\\\\to  -1(-4,1,2) = (4,-1,-2) ∉ D

this is an inequality, which is not hold

The set D is not part of the subspace R^3

For point E:

\to E= {(x,0,0)}|x \ is \ arbitrary) \\\\\to for (x_1,0 ,0) ,(x_{2},0 ,0) \varepsilon E \\\\\to  a(x_1,0,0) +b(x_{2},0,0)= (ax_1+bx_2,0,0)\\

The  x_1, x_2 is the arbitrary, in which ax_1+bx_2is arbitrary  

\to a(x_1,0,0)+b(x_2,0,0) \varepsilon  E

The set E is the part of the subspace R^3

For point F:

\to F= {(-2x,-3x,-8x)}|x \ is \ arbitrary) \\\\\to for (-2x_1,-3x_1,-8x_1),(-2x_2,-3x_2,-8x_2)\varepsilon  F \\\\\to  a(-2x_1,-3x_1,-8x_1) +b(-2x_1,-3x_1,-8x_1)= (-2(ax_1+bx_2),-3(ax_1+bx_2),-8(ax_1+bx_2))

The x_1, x_2 arbitrary so, they have ax_1+bx_2 as the arbitrary \to a(-2x_1,-3x_1,-8x_1)+b(-2x_2,-3x_2,-8x_2) \varepsilon F

The set F is the subspace of R^3

5 0
3 years ago
Other questions:
  • A pound of apples cost $1.30. Sawyer bought 2 1/2 pounds of apples. How much did Sawyer pay?
    14·1 answer
  • What is 25% off of $120.00 plus 7.8 sales tax
    10·1 answer
  • <img src="https://tex.z-dn.net/?f=%2825x%20%2B%204%20%7Bx%7D%5E%7B2%7D%29%20%5Ctimes%20%2836%20%7By%7D%5E%7B3%7D%20%29" id="TexF
    6·1 answer
  • A rocket is launched 85 miles per hour what is the measurement in feet per second
    6·1 answer
  • How do you solve 2x-4y=7, for x<br> with step by step
    14·1 answer
  • When the production manager finds the average life of her bulb-lifetime data, this is an example of what phase of inferential st
    14·2 answers
  • 72 = 7 x 7 = 49 i need an answer for this question
    12·1 answer
  • डएका समांतर भुज चौकोनाच्या हाताच्या दोन ओली
    10·1 answer
  • I need help on my question that’s not anwserd please help a
    9·1 answer
  • 1.567 X 8.361 i will give brainlist
    10·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!