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
BlackZzzverrR [31]
3 years ago
12

I need help with this question forreal

Mathematics
1 answer:
larisa [96]3 years ago
3 0
The regular rules of arithmetic apply to function values. Addition and multiplication are commutative, but subtraction and division are not.

The ring operator, signifying a function of a function, is not commutative, either. A simple example can illustrate this:
   f(x) = 3
   g(x) = x²
   (f◦g)(x) = f(g(x)) = f(x²) = 3
   (g◦f)(x) = g(f(x)) = g(3) = 3² = 9 . . . . . not equal to 3


The only appropriate choice for Question 19 is ...
   A. (f+g)(x) = (g+f)(x)
You might be interested in
An airplane is flying from New York City to Los Angeles. The distance it travels in miles d, is related to the time in seconds,
34kurt

Answer:

A. 0.15

B. 0.45

C. 85

Step-by-step explanation:

Given that:

Equation to represent the relation between distance, d in miles and time t in seconds:

d=0.15t

<em>A. </em>

To find: The speed of airplane in miles per second.

Formula for speed is given as:

Speed = \dfrac{Distance}{Time}

Here, we will have to find the value of \frac{d}{t}.

Dividing the given equation by t, we get:

\dfrac{d}{t}=0.15

d is in miles and t is in seconds.

Therefore, the answer is <em>0.15</em>.

<em>B.</em>

Distance traveled in 30 seconds.

Given that: t = 30 seconds

To find: d = ? in miles

d = 0.15\times 3 = 0.45

<em>C.</em>

The time taken to travel a distance of 12.75 miles.

Given that : d =12.75\ miles

To find: t = ? seconds

12.75 = 0.15t\\\Rightarrow t = \dfrac{12.75}{0.15}\\\Rightarrow \bold{t = 85}

3 0
3 years ago
A baseball is hit with an initial vertical velocity of 121 feet per second and the ball was hit 1 foot above ground. How high is
Viktor [21]

Answer:

After 4 seconds, the ball is at 229 ft

Step-by-step explanation:

Here, we want to get the height of the ball at 4 seconds

What we have to do here is to substitute the value of t for 4 seconds in the equation

We have;

h = -16(4^2) + 121(4) + 1

h = -256 + 484 + 1

h = 229 ft

5 0
3 years ago
If α , β are roots of x2 + 5x + a =0 and 2α + 5β = -1 then α is equal to _____?
ELEN [110]

9514 1404 393

Answer:

  -8

Step-by-step explanation:

If α and β are roots of x^2 +5x +a = 0, then we must have ...

  (x -α)(x -β) = x^2 +5x +a

  x^2 -(α+b)x +αβ = x^2 +5x +a

Then ...

  α + β = -5

Together with the other relation between the roots, we have a system of equations in α and β.

Using the above to write an expression for β, we get ...

  β = -α -5

Substituting this into the given relation, we have an equation for α:

  2α +5(-α -5) = -1

  -3α -25 = -1 . . . . . . eliminate parentheses

  -24 = 3α . . . . . . . . add 3α +1

  -8 = α

The root α is equal to -8.

3 0
4 years ago
-28 = 4y -4 solve for y and simplify
Vinil7 [7]

Answer:

y = -6

Step-by-step explanation:

-28 = 4y - 4

4y - 4 = -28

4y - 4 (+ 4) = -28 (+ 4)

4y - 4 + 4 = -28 + 4

4y = -24

4y/4 = -24/4

y = -6

4 0
3 years ago
Read 2 more answers
-5(4x-2) = -2(3+6x)<br> what is the answer and how do you get it
Serhud [2]

Answer:

x = 2

Step-by-step explanation:

-5(4x - 2) = -2(3 + 6x)

-20x + 10 = -6 - 12x            Distribute -5 to 4x and -2 and distribute -2 to 3 and

                                           6x

10 = -6 + 8x                        Add 20x to both sides

16 = 8x                                Add 6 to both sides

2 = x                                   Divide 8 to both sides

8 0
3 years ago
Read 2 more answers
Other questions:
  • Determine whether the solids are similar.
    15·1 answer
  • What is the product of -1 3/4 and 2 4/5 expressed as a mixed number
    8·1 answer
  • When x=1, then y = ?​
    12·1 answer
  • What is the average length of stay for the month of August for adults and children? Round to one decimal place. In August, an ac
    5·1 answer
  • What is the measure of i substract 45 from 135 i got 90 ans so is it right or wrong
    14·2 answers
  • Match the equations with the correct solution.
    8·1 answer
  • Use the divisibility rules to determine which of the following numbers 528 is divisible by. (Check all that apply.)
    14·1 answer
  • Place the numbers in ascending order.
    15·1 answer
  • Which equation represents the function shown on the graph?
    13·1 answer
  • PLEASE help me. Please. Which debates among historians over the effects of the Vietnam War did you discover in your research?
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!