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2 years ago

12

The method of completing the square was used to solve the equation 2x^2 – 12x + 6 = 0. Which equation is a correct step when usi

ng this method?
(x - 3)2 = 6

(x – 3)² = 3

(x - 3)2 = -3

1 answer:

solong [7]2 years ago

4 0

Answer:

(x-3)^2 = 3

Step-by-step explanation:

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What is an equation for the line parallel to y = -x + 7 that passes through (7,-2)?

gtnhenbr [62]

Answer:

y = -x + 5

Step-by-step explanation:

Parallel line has same slope with the given, so the line is

y = -x + b

Using the given point, finding the value of b

-2 = -7 + b
b = 7 - 2
b = 5

The equation is

y = -x + 5

8 0

3 years ago

The Westminster Widget Company has an old machine that can produce 50 widgets in five hours. Now they have purchased a

Norma-Jean [14]

<u>Answer: </u>

If they worked together it would take 4 hours for the machines to produce 100 widgets

<u>Step-by-step explanation:</u>

w = widgets hr = hour ph = per hour

Old machine - 50w = 5hr = 10ph

New machine - 30w = 2hr = 15ph

Old machine - 20w = 2hr

New machine - 30w = 2hr

<h3>Together - 50w = 2hr x 2 </h3><h3> Final: 100w = 4hr</h3>

I hope this helped!

8 0

2 years ago

Simply and write in standard form. Then classify the polynomial by degree and number of terms (5x^3+3x^2-7x+10)-(3x^3-x^2+4x-1)

Leto [7]

Answer: standard form-2x^3+3x^2-11x+11

7 0

3 years ago

The sum of the radius of the base and the height of a solid cylinder is 37m. If the total surface area of the cylinder is 1628 m

MA_775_DIABLO [31]

Answer:

4618.14 $m^{3}$ or 4618 $m^{3}$

Step-by-step explanation:

From T.S.A = 2 $\pi$ rh + 2 $\pi$ $r^{2}$

where T.S.A = 1628 $m^{2}$

1628 = 2 $\pi$ rh + 2 $\pi$ $r^{2}$

1628 = ( rh + $r^{2}$ ) 2 $\pi$

by dividing both side by 2 $\pi$

$\frac{1628}{2\pi }$ = rh + $r^{2}$

259.10 = rh + $r^{2}$

rh = 259.10 - $r^{2}$

h = $\frac{259.10 - r^{2} }{r}$ <u> </u>(1)

From Radius + Height = 37

r + h = 37 <u> </u>(2)

by substituting eqn 1 into 2

r + $\frac{259.10 - r^{2} }{r}$ = 37

by multiplying r to both side

$r^{2}$ + 259.10 - $r^{2}$ = 37r

259.10 = 37r

r = $\frac{259.10}{37}$

r = 7.00 ≅ 7

From Eqn 2

r + h = 37

7 + h = 37

h = 37 - 7

h = 30

so Volume of a cylinder = $\pi r^{2} h$

V = $\pi$ * $7^{2}$ * 30

V = 4618.14 $m^{3}$ ≅ 4618 $m^{3}$

4 0

4 years ago

Read 2 more answers

Fthis other one but this is cheesing hard

mash [69]

A is zero

B) D

C) x= - 1 & x= 4

Hope this helps!

8 0

2 years ago