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
Marina86 [1]
3 years ago
12

I need help on this answer now !!!!

Mathematics
1 answer:
tiny-mole [99]3 years ago
8 0

Answer:

14

Step-by-step explanation:

substitute -2 into x in the equation

f(x) = -x^2 - 9x

f(-2) = -(-2)^2 - 9(-2)

f(-2) = 14 after calculation

You might be interested in
Two groups of tourists are on the same floor of a skyscraper they are visiting, and they board adjacent elevators at the same ti
Mariulka [41]

Let time be x distance be y

  • 140x=y-(1)
  • 290x=360-y-(2)

Put value in eq(2)

\\ \rm\longmapsto 290x=360-(140y)

\\ \rm\longmapsto 440x=360

\\ \rm\longmapsto x=1.2min

Put it in eq(1)

  • d=1.2(140)=168m
7 0
2 years ago
If f(x)=7x-3, what is the value of x when f(x)=1
frosja888 [35]
Set up your equation:
1 = 7x - 3

Add 3 to both sides:
7x = 4

Divide both sides by 7:
x = 4/7

Hope this helps!
3 0
2 years ago
Hi i just need help checking if my answer is correct I have been working on a implicit diffrention problem and I need some help.
SSSSS [86.1K]

Answer:

  \dfrac{dy}{dx}=\dfrac{-4x^3y+2y^3+3x^2y^3}{x^4-6xy^2-3x^3y^2}

Step-by-step explanation:

Normally, when I do this, I differentiate each term first with respect to x then with respect to y. In this solution, I differentiated the entire expression with respect to x, then with respect to y. That makes separating the dx and dy coefficients much easier, so the solution almost falls into your lap.

  -x^4 y + 2 x y^3 + x^3 y^3=0 \qquad\text{given}\\\\(-4x^3y+2y^3+3x^2y^3)dx+(-x^4+6xy^2+3x^3y^2)dy=0\\\\(-4x^3y+2y^3+3x^2y^3)dx=(x^4-6xy^2-3x^3y^2)dy\\\\\boxed{\dfrac{dy}{dx}=\dfrac{-4x^3y+2y^3+3x^2y^3}{x^4-6xy^2-3x^3y^2}}

6 0
2 years ago
45 +2.50m = 3.75m<br> what is the answer
zhannawk [14.2K]

m = 36

<u>Work</u>

<em>45 + 2.50m = 3.75m</em>

<em>        -3.75m    -3.75m</em>

<em>45 - 1.25m = 0</em>

<em>- 45             - 45</em>

<u><em>-1.25</em></u><em>m = </em><u><em>-45</em></u>

<em>-1.25     -1.25</em>

<em>     </em>m = 36

3 0
3 years ago
Liz is shipping a package to her friend. The maximum weight of a medium flat-rate box is 20 pounds, including the box which weig
Goryan [66]
W= less than or equal to 19.63 pounds
7 0
3 years ago
Other questions:
  • Julio bought 4 pencils and 3 erasers for $0.37 and David paid $0.33 for 3 pencils and 4 erasers. What is the cost of one pencil?
    9·1 answer
  • Which expression fits this description?
    7·1 answer
  • Find the slope of the roof of a home that rises 8 feet for every horizontal change of 24 feet
    15·1 answer
  • A square has a perimeter of 12x + 52 units. Which expression represents the side length of the square in units?
    7·1 answer
  • What is the formula for the following arithmetic sequence? 12, 6, 0, -6, ...
    9·2 answers
  • The ratio of adults to children in a movie theater is 7:2. If there are 26 children in the theater, how many adults are there?
    13·1 answer
  • If x=-3 calculate the value of x2 -x
    9·2 answers
  • How do I work out the problem 44,756÷167
    10·1 answer
  • What is 30x30x30x30 plz i need help
    9·1 answer
  • I need help with this problem please if you can help I would really appreciate it and the problem is number 10
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!