All categories

3 years ago

If c(x)= 4x-2 and d(x)

Mathematics

1 answer:

Allushta [10]3 years ago

8 0

Answer:

Step-by-step explanation:

2-4x

You might be interested in

Match each polynomial to the term that does not change the polynomial's classification when added to it.

zmey [24]

It all depends in what there exponents are

4 0

3 years ago

Y is directly proportional to x, and y =216 when x=2 find y when x=7

jek_recluse [69]

Y = kx
@ y = 216, x = 2
k = y/x = 216/2 = 108

@ x=7
y = (108)(7) = 756

5 0

3 years ago

Find m angle ABC Please help

Marina CMI [18]

Answer:

ABC = 35

Step-by-step explanation:

x and 3x-70 are corresponding angle and corresponding angle are equal when the lines are parallel

x = 3x-70

Subtract 3x from each side

x-3x = 3x-70-3x

-2x= -70

Divide by -2

-2x/-2 = -70/-2

x = 35

x = 3x-70 = 35

8 0

3 years ago

There are four identical quadrants which is 15in.

babunello [35]

I think the answer is 225

4 0

3 years ago

It takes a train 60 seconds to completely drive through a bridge of 1260 m, and 90 seconds to completely drive through a tunnel

Olegator [25]

The length of train is 120 meters

The speed of train is 25 meter per second

Solution:

The speed is given by formula:

$speed = \frac{distance}{time}$

Given that,

It takes a train 60 seconds to completely drive through a bridge of 1260 m

And 90 seconds to completely drive through a tunnel of 2010 m

Let the length of the train be "x"

The total distance travelled by the train across the bridge is given by:

total distance = x + 1260 + x = 2x + 1260

[ here we use x + x to represent that train completely drives through bridge ]

The time taken is given as 60 seconds

Therefore, the speed is given as:

$speed = \frac{2x+ 1260}{60}$

The total distance travelled by the train through the tunnel is given by:

total distance = x + 2010 + x = 2x + 2010

The time taken is given as 90 seconds

Therefore, the speed is given as:

$speed = \frac{2x+ 2010}{90}$

The speed of the train was the same in both cases.

Equate both speeds

$\frac{2x+ 1260}{60} = \frac{2x+ 2010}{90}$

$\frac{x+630}{30} = \frac{x+1005}{45}$

$45(x+630) = 30(x+1005)\\\\45x + 28350 = 30x + 30150\\\\45x - 30x = 30150 - 28350\\\\15x = 1800\\\\x = 120$

Thus length of train is 120 meters

Find the speed of train:

$speed = \frac{2x+ 1260}{60}\\\\speed = \frac{2(120) + 1260)}{60}\\\\speed = 25$

Thus speed of train is 25 meter per second

5 0

3 years ago