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
12

5. If f(x) = -x2 - 7x +4 and g(x) = -5x - 3, what is the value of f(-2)-g(6)

Mathematics
1 answer:
Alex787 [66]3 years ago
5 0

9514 1404 393

Answer:

  47

Step-by-step explanation:

Evaluate the functions and find the required difference.

  f(-2) = -(-2)^2 -7(-2) +4 = -4 +14 +4 = 14

  g(6) = -5(6) -3 = -33

Then the difference is ...

  f(-2) -g(6) = 14 -(-33) = 14 +33 = 47

You might be interested in
The side lengths of the Australian flag are in a ratio of 1:2. If the flag is 5 feet long, what is it’s height?
jonny [76]

height:length

1:2

x feet: 5 feet

You know the length and the ratio of the dimensions. From the ratio you know that the length is twice the height. So height = 5/2 = 2.5 ft.

6 0
3 years ago
The curve with equation y=ax^2+bx has a gradient of 3 at the point (2,-2). Find the values of a and b.
Airida [17]

Answer:

a = 2, b = - 5

Step-by-step explanation:

Given

y = ax² + bx

\frac{dy}{dx} is the measure of the slope at x = a

Differentiate each term with respect to x using the power rule

\frac{d}{dx}(ax^{n} ) = nax^{n-1}

\frac{dy}{dx} = 2ax + b, hence

2ax + b = 3 at (2, - 2)

Substitute x = 2 into \frac{dy}{dx}

4a + b = 3 → (1) and substitute x = 2 into y

4a + 2b = - 2 → (2)

Subtract ( 1) from (2)

b = - 2 - 3 = - 5

Substitute b = - 5 into (1)

4a - 5 = 3 ( add 5 to both sides )

4a = 8 ( divide both sides by 4 )

a = 2

7 0
3 years ago
Factor 3x² - 2x + 6​
aalyn [17]

Answer:

sorry this does not factor out

Step-by-step explanation:

5 0
3 years ago
Spherical ball of lead has a diameter of 5.5 cm . what is the mass of the sphere if lead has a density of 11.34 g/cm3? (the volu
umka21 [38]
To know the mass of the sphere given the density , we first define density as

D = Mass / volume

now we have a value of density but doesn't have volume so we compute for it using the given radius 5.5 cm

V = <span>(4/3)πr^3 

so 
mass  =  D (volume)
mass = 11.34 (</span>(4/3)π(5.5)^3 )

mass = 7902.96 g 

<span>Hope my answer would be a great help for you.    
If </span>you have more questions feel free to ask here at Brainly.

<span> </span>

4 0
3 years ago
Why do some metals react with only steam?​
Gnoma [55]

Answer:

Metals which react with steam form the solid metal oxide and hydrogen gas.

In general, the more reactive the metal, the more rapid the reaction. Aluminium is unusual, because it is a reactive metal that does not react with water. Its surface forms a protective layer of aluminium oxide that keeps water away from the metal below.

The apparatus used to react a metal with steam and collect the gas produced is shown below.

7 0
3 years ago
Read 2 more answers
Other questions:
  • is 7 over 9 , 5 over 12, and 5 over 8 terminating or repeating decimals? and what are they in decimals? please explain..thx :)
    13·1 answer
  • The data gives the responses of 15 students who were asked how many text messages they send in a day.
    11·1 answer
  • Can someone break this down for me!! I'm stuck
    12·1 answer
  • Solve for n. <br><br> -67=-4n+3(1+6n)<br><br> show work!
    7·1 answer
  • A rope is 250 centimeters long.
    13·2 answers
  • The football team has played 12 games so far this season. They have won 8 games. What percent of their games has the team lost?
    14·2 answers
  • What’s distributive property to express 36+16
    5·1 answer
  • The Venn diagram represents the relationship between the sets and subsets of rational numbers.
    10·2 answers
  • Simplify:<br> n+(n+1)+(n+2)+...+[n+(n-1)]+...+(n+2)+(n+1)+n
    7·2 answers
  • Help please ! need asap
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!