Physics, 01.10.2019 16:30 Roro7522

Arectangular wall is covered entirely with two kinds of decorative tiles: regular and jumbo. 1/3 of the tiles are jumbo tiles, which have a length three times that of regular tiles and have the same ratio of length to width as the regular tiles. if regular tiles cover 80 square feet of the wall, and no tiles overlap, what is the area of the entire wall? a. 160b. 240c. 360d. 440e. 560

Answers: 2

Show answers

Answers

Answer from: ALEX33333

D. 440

Explanation:

Let's call R the number of regular tiles on the wall, J the number of Jumbo tiles on the wall, T the number of tiles on the wall, Ar the area of every regular tile and Aj the area of every Jumbo tile.

Then, the equation that describe the area of the entire wall is:

A = (R*Ar) + (J*Aj)

Where (R*Ar) is the are that is cover by regular tiles and (J*Aj) is the area that is cover by Jumbo tiles.

From the question we know that regular tiles cover 80 square feet of the wall, so:

R*Ar = 80

On the other hand, 1/3 of the tiles are jumbo tiles, so:

(1/3)T = J

T = 3J

Additionally, the sum of regular tiles and Jumbo tiles give as the number of tiles on the wall, then we can formulate the following equation:

R + J = T

R + J = 3J

R = 3J - J

R = 2J

R/2 = J

We also know that Jumbo tiles have a length three times that of regular tiles and have the same ratio of length to width as the regular tiles, so if we call L the length of the regular tiles and W the width of the regular tiles, we have:

Ar = LW

Then, the area of the Jumbo tiles is:

Aj = (3L)*(3W) = 9LW

Aj = 9Ar

If we replace the equation R/2 = J and Aj = 9Ar on the initial equation we get:

A = (R*Ar) + (J*Aj)

$A =(R*Ar)+ (\frac{R}{2}*9Ar)\\A = (R*Ar)+\frac{9}{2} (R*Ar)\\A=\frac{11}{2} (R*Ar)$

Finally, replacing R*Ar by 80, we get:

$A = \frac{11}{2}*80\\A = 440$

Answer from: Quest

Answer: it will take 4.36 seconds to reach her average velocity 10.69 miles/hour.explanation: we have equation of motion $s=ut+\frac{1}{2} at^2$ ,where s is the displacement, a is the acceleration, u is the initial velocity and t is the time taken.average velocity = displacement/ time taken.average velocity = 10.69 miles/hr = 10.69*1.6*1000/(60*60) = 4.75 m/s4.75 = s/ts = 4. 1we also have acceleration = 2.18 m/s², initial velocity = 0 m/s $s=0*t+\frac{1}{2} *2.18*t^2$ $s=1.09t^2[/ 2equating equation 1 and 2 [tex]4.75t = 1.09t^2\\ \\ t=4.36 seconds.$ so it will take 4.36 seconds to reach her average velocity 10.69 miles/hour.

Answer from: Quest

The sample with the lowest specific heat capacity will have the greatest temperature increase. in this case, it would be platinum.

Another question on Physics

Physics, 22.06.2019 11:00

What is the measurement of how fast an object moves relative to a reference point?

Answers: 1

Answer

Physics, 22.06.2019 13:10

Aplane flying horizontally at an altitude of 1 mile and a speed of of 500mih passes directly over a radar station. find the rate at which the distance from the plane to the station is increasing when it is 2mi away from the station.

Answers: 1

Answer

Physics, 22.06.2019 16:40

On your wedding day your lover gives you a gold ring of mass 3.67 g. 48 years later its mass is 3.44 g. on the average how many atoms were abrated from the ring during each second of your marriage? the atomic mass of gold is 197 u. don't enter units

Answers: 1

Answer

Physics, 22.06.2019 18:00

Astone is thrown with a speed v0 and returns to earth, as the drawing shows. ignore friction and air resistance, and consider the initial and final locations of the stone. which one of the following correctly describes the change δpe in the gravitational potential energy and the change δke in the kinetic energy of the stone as it moves from its initial to its final location? options a.δpe = 0 j and δke = 0 j b.δpe is positive and δke is negative c.δpe = 0 j and δke is positive d.δpe is negative and δke is positive e.δpe = 0 j and δke is negative

Answers: 3

Answer

You know the right answer?

Arectangular wall is covered entirely with two kinds of decorative tiles: regular and jumbo. 1/3 of...

Questions