Ask question

Ask question

All categories

3 years ago

10

After the knock game, train A and B both stop at the station. They left at 10:00 pm. Train A leaves every 4 minutes. Train B lea

ves every 6 minutes. When is the next time train A and B will leave together? Show work plz

1 answer:

shepuryov [24]3 years ago

5 0

Train a:4 8 12
train b:6 12

You might be interested in

Someone help please

Firdavs [7]

Answer:

so just move the corners out by 2 from the a i think

Step-by-step explanation:

5 0

3 years ago

Solve x^3+3x^2-23x-20=0

adoni [48]

Hello from MrBillDoesMath!

Answer:

x = 4

x = ( -7 + sqrt(29)) /2

x = ( -7 - sqrt(29)) /2

Discussion:

x^3+3x^2-23x-20 factors as (x - 4) (x^2 + 7 x + 5) so x =4 is one root

The roots of the quadratic factor, x^2 + 7x + 5, can be found using the quadratic formula where a = 1, b = 7, and c = 5

x = ( -b +\- sqrt(b^2-4ac)) / 2a

x = ( -7 +\- sqrt( 7^2 - 4*1*5) ) / (2*1) =>

x = ( -7 +\- sqrt (49-20) ) / 2 =>

The "+" root: ( -7 + sqrt(29)) /2

The "-" root: ( -7 - sqrt(29)) /2

Regards,

MrB

5 0

3 years ago

PLEASE HELP!!!! I NEED TO GRADUATE HIGH SCHOOL!

Yakvenalex [24]

Answer:

B

Step-by-step explanation:

Class A mean: 4.8

Class B mean: 4

B) yes, .8 less

8 0

4 years ago

Last semester Jacob spent 1/3 of an hour doing math homework on each evening that he had math homework.he calculated that he spe

Marina CMI [18]

Jacob had math homework on 81 evenings.

Step-by-step explanation:

Time spent of each evening = 1/3 of an hour

Time spent in minutes = $\frac{1}{3}*60 = 20\ minutes$

Total time spent = 27 hours

Total time spent in minutes = 27*60 = 1620 minutes

Let,

x be the number of evenings spent doing math homework.

Time spent each day* Number of evenings = Total time spent

$20x=1620$

Dividing both sides by 20

$\frac{20x}{20}=\frac{1620}{20}\\x=81$

Jacob had math homework on 81 evenings.

Keywords: multiplication, division

Learn more about division at:

#LearnwithBrainly

5 0

3 years ago

4x - y = -4<br> 5x = 2y +1<br> how do I solve this using elimination?

julia-pushkina [17]

8x - 2y = -8
-5x + 2y = -1

3x = -9
x = -3

4 0

3 years ago

Read 2 more answers