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
alexandr1967 [171]
3 years ago
10

Help with functions?

Mathematics
1 answer:
ivolga24 [154]3 years ago
5 0

Answer:

The function g(x) = - x² + 14x + 39 is at a minimum when x = 7 is not true i.e. false.

Step-by-step explanation:

The function is given to be g(x) = - x² + 14x + 39 .......... (1)

Now, the condition for maxima or minima is g'(x) = \frac{dg(x)}{dx} = 0.

Now, differentiating equation (1) we get, g'(x) = - 2x + 14 ........ (2)

Hence, for maxima or minima g'(x) = 0 = - 2x + 14

⇒ x = 7

Now, from equation (2) and differentiating both sides with respect to x again g"(x) = \frac{d^{2}g(x) }{dx^{2} } = -2 < 0

Therefore,the function g(x) has maxima at x = 7

Therefore, the function g(x) = - x² + 14x + 39 is at a minimum when x = 7 is not true i.e. false.

You might be interested in
This section of a concrete skateboard ramp has the shape of a triangular prism. Find the volume of the triangular prism. Find th
NISA [10]

Answer:

The volume of the triangular prism: 59.2 ft^{3}

The value of the concrete used is: 16*4 = $64

Step-by-step explanation:

I think your question is missed of key information, allow me to add in and hope it will fit the original one.  Please have a look at the attached photo

My answer:

As we know that, the formula to find out the volume of the triangular prism is:

V = \frac{1}{2} a*b*h when h is the height and a&b are the length of the two square edges. So we have:

  • V = \frac{1}{2}*4*4*7.4 = 59.2 ft^{3}

To find the concrete used in the ramp if the cost of concrete is $ 4.00 per cubic foot, we need to know the area of the ramp, which is:

S = 4*4 = 16 ft^{2}

Hence, the value of the concrete used is: 16*4 = $64

8 0
3 years ago
Read 2 more answers
Kendra made a bar graph showing the number of hours she spent doing homework for different school subjects last month. How many
galben [10]

Answer:I do not know because there are no number in that equation sorry

:( :(

Step-by-step explanation:

3 0
3 years ago
GUYS AGAIN PLEASE HELP 1 MILLION POINTS, get it wrong i report you!!
Evgesh-ka [11]

Answer:

Sweats heavily , I hope the answer is FALSE

Step-by-step explanation:

Is it right. Please mark Brainliest if is.

4 0
2 years ago
I need help on this I will give brainlist help it will mean a lot this is my last math problem help me!​
deff fn [24]

Answer:answer is b

Step-by-step explanation: Just makes since

6 0
3 years ago
PLEASE HELP I WILL GIVE BRAINLYEST<br> Explain if you agree or disagree with Blake's claim..
o-na [289]

Ok i have thought about this and

no.

5 0
1 year ago
Read 2 more answers
Other questions:
  • In the circle below, what is DC? ________
    11·1 answer
  • A 5000 seat theater has tickets at $27 and $40. How many tickets should be sold at each price for a sellout performance to gener
    5·1 answer
  • 1.6 hours to 0.95 hour increase and decrease?? also show the work.. thxs!
    8·1 answer
  • Is 84/45 a irrational repeating decimal or just a irrational one
    14·1 answer
  • Random selection refers to
    7·1 answer
  • It takes 20 minutes for 5 people to paint 5 walls how many minutes does it take 9 people to paint 9 walls
    7·2 answers
  • Find the area of the large and small rectangles :,))
    11·2 answers
  • Which equation shows the best estimate for 4,310 ÷ 72 using compatible numbers?
    11·2 answers
  • Please help me I will give brainlest if right
    7·1 answer
  • Find the volume of the cylinder. Use 3.14 for a.
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!