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Fynjy0 [20]
3 years ago
10

Solve using the quadratic formula.

Mathematics
1 answer:
Artemon [7]3 years ago
3 0

Answer:

This is not really an answer but if you photomath and type in the problem for example “9x^2+x-9=0” you’ll be able to find your answer easily

Step-by-step explanation:

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The power generated by an electrical circuit (in watts) as a function of its current ccc (in amperes) is modeled by: P(c)=-20(c-
alekssr [168]

Answer:

The current that produces maximum power is 3A

Step-by-step explanation:

Given

P(c) = 20(c - 3)^2

Required [Missing from the question]

The current that produces maximum power

First, we represent the function in standard form

P(c) = 20(c - 3)^2

P(c) = 20(c - 3)(c - 3)

Open bracket

P(c) = 20(c^2 -6c+ 9)

P(c) = 20c^2 -120c+ 180

The maximum value of c is:

Max(c) = \frac{-b}{2a}

Where:

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

By comparison: P(c) = 20c^2 -120c+ 180

a = 20

b = -120

c = 180

So, we have:

Max(c) = \frac{-b}{2a}

Max(c) = \frac{-(-120)}{2 * 20}

Max(c) = \frac{120}{40}

Max(c) = 3

5 0
2 years ago
Help me find the volume please
Elena L [17]

Answer:

<h2>V = 605 in³</h2>

Step-by-step explanation:

The formula of a volume of a pyramid:

V=\dfrac{1}{3}BH

B - area of a base

H - height

We have the square in the base with side length a = 11 in.

Area of a base:

B=11^2=121\ in^2

Calculate the volume:

V=\dfrac{1}{3\!\!\!\!\diagup_1}(121)(15\!\!\!\!\!\diagup^5)=(1)(121)(5)=605\ in^3

3 0
3 years ago
Tell whether x and y show direct variation. Explain your reasoning. x=y+2
Mashutka [201]

Answer:

It does not show variation

Step-by-step explanation:

Given

x = y + 2

Required

Determine if there's direct variation between x and y

The general form of direct variation is:

y = kx

Make y the subject of formula in the given parameters;

x = y + 2

y = x - 2

Compare y = x - 2 to y = kx

<em>Since they are not of the same form, then the given equation do not show direct variation</em>

6 0
3 years ago
Find both the sum and difference of the following rational numbers. 3/11, 13/5
anzhelika [568]
For 3/11 the difference is 8 the sum is 14.the difference of 13/5 is 8 the sum is 18
8 0
3 years ago
Read 2 more answers
Can someone help me with these questions
Whitepunk [10]
1. C

3/8 = 0.375


Hope this helped.
8 0
2 years ago
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