4 years ago

Help please in this question I can't answer it :(

Mathematics

1 answer:

zzz [600]4 years ago

5 0

I can help just let me solve it

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certain electronics manufacturer found that the marginal cost C to produce x DVD/Blu- ray players can be found using the equatio

AleksAgata [21]

Answer:

242.

Step-by-step explanation:

C = 0.03 x 2 − 8 x + 700

When the marginal cost = $522 we have:

522 = 0.03 x 2 − 8 x + 700

0.03x^2 - 8x + 700 - 522 = 0

0.03x^2 - 8x + 178 = 0

Using the quadratic formula:

x = [ -(-8) +/- sqrt( 64 - 4 * 0.03 * 178)] / 0.06

= 8 +/- sqrt42.64 / 0.06

= 242 players.

8 0

3 years ago

The general form of a circle is given as x^2+y^2+4x-10y-7=0.

mylen [45]

Answer:

center: (-2, 5)
radius: 6

Step-by-step explanation:

We can complete the squares of the x- and y-terms by adding the square of half the linear term coefficient.

(x^2 +4x) +(y^2 -10y) = 7

(x^2 +4x +4) +(y^2 -10x +25) = 7 + 4 + 25

(x +2)^2 +(y -5)^2 = 6^2

Compare to ...

(x -h)^2 +(y -k)^2 = r^2 . . . . . standard form equation of a circle

We see that the center is ...

(h, k) = (-2, 5)

and the radius is ...

r = 6

8 0

4 years ago

PLEASE HELP ILL GIVE BRAINLIEST!!

dlinn [17]

Answer:

Step-by-step explanation:

Radius r = 12.5/2 = 6.25 cm

Height h = 7 cm

volume = πr²h = 3.14⋅6.25²⋅7= 858.6 cubic cm

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3 years ago

(m3 - 6m2 - 16m + 63) divided by (m - 7)

Arlecino [84]

Therefore( $m^3 -6m^2-16m +63$ )÷ (m-7) $= (m^2 +m-9)$

Step-by-step explanation:

$m^3 -6m^2-16m +63$

$=m^3 -7m^2$ $+m^2 -7m$ $-9m+63$

$= m^2(m-7)$ $+m(m-7)$ $-9(m-7)$

$= (m-7 ) (m^2 +m-9)$

Therefore( $m^3 -6m^2-16m +63$ )÷ (m-7) $= (m^2 +m-9)$

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4 years ago

Ana completed 40% of her homework assignment.Her assignment contains 30 math problems. How many problems does she STILL need to

Brut [27]

Answer:

your answer is 16

Step-by-step explanation:

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3 years ago