All categories

2 years ago

URGENT!!!

Mathematics

1 answer:

Makovka662 [10]2 years ago

8 0

Answer:

Train A - 50 miles per hour

train B - 30 miles per hour

Step-by-step explanation:

Let x mph be the speed of the train B, then the speed of the train A is (x+20) mph.

In 3 hours,

train A travels 3(x+20) miles
train B travels 3x miles

In total, they covered the distance of 240 miles, so

$3(x+20)+3x=240\ \ \ \text{[Divide by 3]}\\ \\x+20+x=80\\ \\2x=80-20\\ \\2x=60\\ \\x=30\ mph\\ \\x+20=30+20=50\ mph$

You might be interested in

While setting up a fireworks display, you have a tool at the top of the

atroni [7]

Answer:

0.79 sec

Step-by-step explanation:

Given there is a tool at the top of the building which is dropped by a worker and it follows the following equation at every instant of time .

$h(t)=-16t^{2} +h_{0}$

where $h_{0} =10 feet$

We know that this height is measured from the base of the building which means that when the tool reaches the bottom of the building it has h = 0 feet.

Let this be done at time t

h(t) = 0

$-16t^{2} +10=0$

$t^{2} =\frac{10}{16}$

$t=\frac{\sqrt{10} }{4}$

t = 0.79 sec

Therefore the total time taken by the tool to reach the bottom of the building is 0.79 sec.

8 0

3 years ago

Find the slope of the line

Alinara [238K]

Answer:

y=-2x+2

Step-by-step explanation:

The y-intercept is 2 and the growth is -2.

7 0

3 years ago

Read 2 more answers

How do yuh evaluate the expression <br> Log 4096<br> 4

Furkat [3]

$log_{4}(4096)$

$4096=4^{6}$

let's replace it

$log_{4}(4^6)$

Them

$log_4(4^6)=6log_{4}(4)$

$log_4(4)=1$

$\boxed{\boxed{log_4(4096)=6}}$

6 0

3 years ago

Read 2 more answers

3O POINTS A photograph measures 10 inches by 12 inches. A frame with constant width is placed around the photograph so that the

KengaRu [80]

What I did was trial and error. (There is a mathematical way to do this but...)
so you have 10*12 and that equals 120. That is the area of the photo. With the frame, the area is 288.
Increase each number as so:
11*13=143.......continue trial and error
16*18=288
answer: 16
Hope that helps!

5 0

2 years ago

If the slope of a line is-1/3 and two points on the line are (10, 8) and (s,− 3 110), what is the value of s?

ivolga24 [154]

Answer:

rextc

Step-by-step explanation:

3 0

2 years ago