They earned 1800 in the five hours. First you need to multiply 12 by 10 and the 12 by 20 which will equal to 360 all together and then you need to multiply that by 5 which equals 1800.

6 0

3 years ago

One plane can travel 20 miles per hour faster than another. One of them goes 285 miles in the same time it takes the other to go

Hatshy [7]

Answer:

$\huge\fbox{Answer ☘}$

$\bold\blue{190 \:miles/hr \:and \:170 \:miles/hr}$

Step-by-step explanation:

Let the speed of faster plane be x

therefore ,

speed of slower plane = x - 20

As the time taken is same ,

$\frac{285}{x} = \frac{255}{x - 20} \\ \\ \frac{57}{x} = \frac{51}{x - 20} \\ \\ 57(x - 20) = 51x \\ \\ 6x = 1140 \\ \\ x = 190$

therefore ,

faster plane travels at a speed of 190 miles/hr

while..

the slower plane travels at a speed = ‎ ‎ ‎ ‎ ‎ ‎( 190-20 ) miles/hr

‎ ‎ ‎ ‎ ‎‎ ‎ ‎ ‎ ‎‎ ‎=> 170 miles/hr

hope helpful~

7 0

2 years ago

Find the domain of the function:<img src="https://tex.z-dn.net/?f=%5Cfrac%7B%5Csqrt%7B2-x%7D%20%7D%7Bx-1%7D" id="TexFormula1" ti

sergey [27]

The domain of the function is (-♾️, 1) (1,2]

8 0

3 years ago

Given f(x, y) = ex^2y<br> Find fy(0.9,0.6). Round your answer to 2 decimal places.

Kazeer [188]

Let x = 0.9

Let y = 0.6

f(0.9, 0.6) = e(0.9)^2(0.6)

Use your calculator.

4 0

3 years ago