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klemol [59]
3 years ago
10

please help ! I need help with math because I am failing and I might have to repeat the grade.. I have a quiz right now I don’t

understand this question I will provide a photo above thank you <3! question “9“ btw

Mathematics
1 answer:
Marat540 [252]3 years ago
6 0

Answer:

D. 6 cups of blue paint

Step-by-step explanation:

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The circumference of a circle is 24π in. What is the area, in square inches? Express your answer in terms of
inessss [21]

Answer:

it is 29in

Step-by-step explanation:

3 0
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10.
slavikrds [6]
The answer is 18
If you subtract 47-29=18
Then if you subtract 47-65=18 the pattern is to add 18
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4 years ago
Find two integers whose sum is 20 and product Is 100​
Neporo4naja [7]

Answer: 10

Step-by-step explanation:

10+10 = 20

10 x 10 = 100

mi would do another but i supposed to be in class :P

5 0
3 years ago
Read 2 more answers
The power generated by an electrical circuit (in watts) as a function of its current ccc (in amperes) is modeled by: P(c)=-12c^2
g100num [7]

Answer:

5 amperes will produce the maximum power of 300 watts.

Step-by-step explanation:

The general form of a quadratic function presents the function in the form

f(x)=ax^2+bx+c

The vertex of a quadratic function is the highest or lowest point, also known as the maximum or minimum of a quadratic function.

We can define the vertex by doing the following:

  • Identify a, b, and c
  • Find, the x-coordinate of the vertex, by substituting a and b into

x-coordinate =-\frac{b}{2a}

  • Find, the y-coordinate of the vertex, by evaluating

y-coordinate =f(x-coordinate )=f(-\frac{b}{2a} )

We know that the power generated by an electrical circuit is modeled by

P(c)=-12c^{2}+120c

This function is a quadratic function.

To find the current that produce the maximum power you must

  • Identify a and b

a = -12 and b = 120

  • Find, the maximum current of the vertex, by substituting a and b into

maximum-current =-\frac{b}{2a}

maximum-current =-\frac{120}{2(-12)}\\\\maximum-current = 5

  • Find, the maximum-power, by evaluating

maximum-power =P(maximum-current)=P(-\frac{b}{2a} )

P(5)=-12(5)^{2}+120(5)=300

5 amperes will produce the maximum power of 300 watts.

We can check our work with the graph of the function P(c)=-12c^{2}+120c and see that the maximum is (5, 300).

5 0
4 years ago
How to express cos 3x in terms of cosx
Elena-2011 [213]
\cos3x=\cos(x+2x)=\cos x\cos2x-\sin x\sin2x
=\cos x(\cos^2x-\sin^2x)-2\sin^2x\cos x
=\cos^3x-\cos x\sin^2x-2\sin^2x\cos x
=\cos^3x-3\cos x\sin^2x
=\cos^3x-3\cos x(1-\cos^2x)
=\cos^3x+3\cos^3x-3\cos x
=4\cos^3x-3\cos x
5 0
3 years ago
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