3 years ago

43. Use the Quadratic Equation to find the Roots of x + 3x - 60

Mathematics

1 answer:

Natasha_Volkova [10]3 years ago

8 0

Answer:

x= 3.82973586

Step-by-step explanation:

You might be interested in

Use the direct variation equation. <br> If y=20 when x=-5. Find x when y=-1.

Olenka [21]

Answer:

-1/4

Step-by-step explanation:

y=x

y=20

x=5

y=_x

20=k(5)

20/5=4

k=4

-1=4(x)

-1/4=x

5 0

3 years ago

Jeff typed a 5-page term paper with 600 words per page. He typed an average of 40 words per minute. If he started typing at 8:15

Leno4ka [110]

Answer:

If Jeff is types 5 pages at 600 words per page, then he types 3,000 words (5 x 600).

So, if Jeff started typing at 8:15 am, he'd finish at 9:30 am.

Step-by-step explanation:

3 0

3 years ago

Read 2 more answers

Find the area of the surface. The part of the surface z = xy that lies within the cylinder x2 + y2 = 36.

rewona [7]

Answer:

Step-by-step explanation:

From the given information:

The domain D of integration in polar coordinates can be represented by:

D = {(r,θ)| 0 ≤ r ≤ 6, 0 ≤ θ ≤ 2π) &;

The partial derivates for z = xy can be expressed as:

$y =\dfrac{\partial z}{\partial x} , x = \dfrac{\partial z}{\partial y}$

Thus, the area of the surface is as follows:

$\iint_D \sqrt{(\dfrac{\partial z}{\partial x})^2+ (\dfrac{\partial z}{\partial y})^2 +1 }\ dA = \iint_D \sqrt{(y)^2+(x)^2+1 } \ dA$

$= \iint_D \sqrt{x^2 +y^2 +1 } \ dA$

$= \int^{2 \pi}_{0} \int^{6}_{0} \ r \sqrt{r^2 +1 } \ dr \ d \theta$

$=2 \pi \int^{6}_{0} \ r \sqrt{r^2 +1 } \ dr$

$= 2 \pi \begin {bmatrix} \dfrac{1}{3}(r^2 +1) ^{^\dfrac{3}{2}} \end {bmatrix}^6_0$

$= 2 \pi \times \dfrac{1}{3} \Bigg [ (37)^{3/2} - 1 \Bigg]$

$= \dfrac{2 \pi}{3} \Bigg [37 \sqrt{37} -1 \Bigg ]$

3 0

2 years ago

I need heelp<br> (-6)-(+8)=

zhuklara [117]

Answer:

I believe its 2 so sorry if im wrong

Step-by-step explanation:

4 0

3 years ago

Tad and his buddies drove to the orange bowl to see their favorite football team win the national championship because of heavy

GenaCL600 [577]

Answer:

7.2

Step-by-step explanation:

6 0

3 years ago

Read 2 more answers