What is the value -40x+18

I need help please and thank you

sineoko [7]

Figure B is 6 (2 ft • 2ft • 2ft)
Figure A is 120 (4ft • 10ft • 3ft)

3 0

4 years ago

Read 2 more answers

∫∫(x+y)dxdy ,d là miền giới hạn bởi x²+y²=1

igor_vitrenko [27]

It looks like you want to compute the double integral

$\displaystyle \iint_D (x+y) \,\mathrm dx\,\mathrm dy$

over the region D with the unit circle x ² + y ² = 1 as its boundary.

Convert to polar coordinates, in which D is given by the set

D = {(r, θ) : 0 ≤ r ≤ 1 and 0 ≤ θ ≤ 2π}

and

x = r cos(θ)

y = r sin(θ)

dx dy = r dr dθ

Then the integral is

$\displaystyle \iint_D (x+y)\,\mathrm dx\,\mathrm dy = \iint_D r^2(\cos(\theta)+\sin(\theta))\,\mathrm dr\,\mathrm d\theta \\\\ = \int_0^{2\pi} \int_0^1 r^2(\cos(\theta)+\sin(\theta))\,\mathrm dr\,\mathrm d\theta \\\\ = \underbrace{\left( \int_0^{2\pi}(\cos(\theta)+\sin(\theta))\,\mathrm d\theta \right)}_{\int = 0} \left( \int_0^1 r^2\,\mathrm dr \right) = \boxed{0}$

3 0

3 years ago

Solve for x in the equation x^2-4x-9=29

Olegator [25]

Answer:

x = 2 + √ 42 , 2 − √ 42

Decimal Form:

x = 8.48074069 , − 4.48074069

Step-by-step explanation:

Solve the equation for x by finding a , b , and c of the quadratic then applying the quadratic formula.

7 0

3 years ago

In the year 2001, a total of 7.2 million passengers took a cruise vacation. The global cruise industry has been growing at 9% pe

g100num [7]

To find the number of passengers for the next year (2002), take the prior value (7.2 million) and multiply it by 1.09. This will give the predicted value for 2002. In this case, it would be (7,200,000 * 1.09 = 7.848 million). This would show that there is a predicted rise of 0.648 million passengers for the year 2002.

7 0

3 years ago

The equation y = 11x describes the amount of money Louis earns, where x is the number of hours he works and y is the amount of m

SIZIF [17.4K]

Answer:

See explanation

Step-by-step explanation:

The equation y = 11x describes the amount of money Louis earns, where x is the number of hours he works and y is the amount of money he earns. When x = 1 hour, y = 11, so Louis earns $11 per hour

Carl's earning

$\begin{array}{cc}\text{Time }h&\text{Money earned }\$\\3&42\\5&70\\8&112\\10&140\end{array}$

A. Since

$\dfrac{42}{3}=\dfrac{70}{5}=\dfrac{112}{8}=\dfrac{140}{10}=14$

Carl earns $14 per hour.

B. Carl earns $14 per hour

Louis earns $11 per hour.

Carl earns $3 more per hour.

C. Plot points from the table on the coordinate plane and connect them with the straight line - this is the graph that represents Carl’s earnings over time in hours.

8 0

4 years ago