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
Oksanka [162]
3 years ago
15

The sum of the base and height of a triangle is 14 cm. Which of the following equations could be used to find the maximum area o

f the triangle?
A) A = 0.5x^2 - 15x

B) A = -0.5x^2 + 7x

C) A = -x^2 + 10x

D) A = x^2 - 10x
Mathematics
1 answer:
Montano1993 [528]3 years ago
8 0

Answer:

B

Step-by-step explanation:

Let the base of the triangle be <em>b</em> and the height be <em>h</em>.

The sum of the base and height is 14. Thus:

b+h=14

Recall that the area of a triangle is given by:

\displaystyle A=\frac{1}{2}bh

From the first equation, solve for either variable:

h=14-b

Substitute:

\displaystyle A=\frac{1}{2}b(14-b)

Distribute:

\displaystyle A=\frac{1}{2}(14b-b^2)

Distribute:

\displaystyle A=-0.5b^2+7b

Let <em>b</em> = <em>x</em>. Hence:

A=-0.5x^2+7x

Therefore, our answer is B.

You might be interested in
Differentiate the equation to find the functions for <br> Velocity v= ds/dt
horrorfan [7]

Differentiation from First Principles is a formal method for determining a tangent's gradient.

<h3>What is meant by differentiation?</h3>

Finding a function's derivative is the process of differentiation. It is also the process of determining how quickly a function changes in relation to its variables.

According to the Sum rule, a sum of functions' derivatives equals the sum of those functions' derivatives. The derivative of two different functions is the difference of their derivatives, according to the Difference rule.

Differentiation from First Principles is a formal method for determining a tangent's gradient. The straight line connecting any two locations on the curve that are fairly near to one another will have a gradient that is similar to that of the tangent at those places.

s(t) = ∫vdt = ∫sin(πt)dt = (-cos(πt))/π + c

substituting the values t = 3, we get

s(-3) = (-cos(-3π))/π + c = 0

simplifying the above equation, we get

(-cos(3π))/π + c = 0

1/π + c = c

c = -1/π

Therefore, the correct answer is s(t) = (-cos(πt))/π - 1/π = (-cos(πt) - 1)/π.

The complete question is:

Given the velocity v=ds/dt and the initial position of a body moving along a coordinate line, find the body's position at time t. v=sin(pi*t), s(-3)=0

To learn more about Differentiation refer to:

brainly.com/question/954654

#SPJ13

7 0
1 year ago
Please help me thanks please
Nikolay [14]

Answer:

Height is 12 ft Diagonal is 13 ft

Step-by-step explanation:

I think this is right but im not sure 100% let me know if i'm wrong please.

3 0
3 years ago
Read 2 more answers
I really need help with this problem.
nekit [7.7K]
It is d i think dont quote me
5 0
3 years ago
Read 2 more answers
The model represents an equation.<br><br> What value of x makes the equation true?
Zina [86]

Answer:

10*-3= -30

Step-by-step explanation:

10*-3= 5*-8

8 0
3 years ago
Read 2 more answers
Keli has 26 roses and 73 carnations. She will put an assortment of 6 flowers in each vase. How many vases will she need for her
Irina18 [472]
Add 26 and 73 = 99 then divide 99 by 6 = 16.5 which is 17 vases
8 0
3 years ago
Other questions:
  • Camille knew that a triangle had one side with a length of 16 inches and another side with a length of 20 inches. She did not kn
    8·1 answer
  • = f(x)=-2X+13 for f(10)
    14·2 answers
  • Write 2.96 as a mixed number or fraction in simplest form show your work
    8·1 answer
  • Find the greatest common factor.
    5·1 answer
  • write an equation that would allow you to solve the following problem. mart'a jump rope is 10 inches shorter than 3 times the le
    9·1 answer
  • What is valek’s first error?
    13·2 answers
  • When I double this number I get 50 whats my number​
    14·2 answers
  • What is the distance between the points A(-3,5) and B(8,-4)
    10·1 answer
  • If d= the number of dogs, which variable expression represents he phase below?
    8·1 answer
  • Games at the carnival cost $2.50 each. The prizes awarded to winners cost $135.00. How many games must be played to make at leas
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!