What is the y-intercept of the line graphed on the grid? <br>A) -1 <br>B) 2 <br> C) -2 <br>D) 1

URGENT!!!

Makovka662 [10]

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

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

8 0

3 years ago

The difference of a number N and 9 is fewer than 4

denis23 [38]

Any number less than or equal to 12

5 0

3 years ago

3g+h=18 2g+3h=26 what is g and what is h

krok68 [10]

Answer:

3

g

+

h

=

18

=

2

g

+

3

h

=

26

=

g

=

h

=

Step-by-step explanation:

5 0

3 years ago

How many F's can I get in order to still pass 7th grade??? What's the maximum??

guapka [62]

:D i hav th same question cuz i hav lik 3 E's
probably one failing grade each quarter or marking period w.e ur school calls it
ik in my school i cn get honor role even tho i hav one C soooo ^thts wat im thinkin

6 0

3 years ago

Read 2 more answers

the first group of students consists of 10 and their average age was 13 years old the next group consisted of 30 students and th

Kazeer [188]

Answer: The average was 9 years old find the average age of both groups is 10 years old.

Step-by-step explanation:

Formula foe average : $\text{Average} =\dfrac{\text{Sum of all observations}}{\text{Number of observations}}$

Given : The first group of students consists of 10 and their average age was 13 years old.

i.e. $13=\dfrac{\text{Sum of ages of students of first group}}{10}\\\\\Rightarrow\ \text{Sum of ages of students of first group}=13\times10=130$ (1)

The next group consisted of 30 students and their average was 9 years old.

i.e. $9=\dfrac{\text{Sum of ages of students of next group}}{30}\\\\\Rightarrow\ \text{Sum of ages of students of nextgroup}=9\times30=270$ (2)

Then from (1) and (2) , the sum of both groups (first group and next group )students = 130+270 =400

Combined students of both groups (first and next group )= 10+30=40

Now , the average of both groups = $\dfrac{\text{Sum of combined students}}{\text{combined students}}$

$=\dfrac{400}{40}=10$

Hence, the average was 9 years old find the average age of both groups is 10 years old.

4 0

3 years ago

What is the y-intercept of the line graphed on the grid? A) -1 B) 2 C) -2 D) 1​

What is the y-intercept of the line graphed on the grid? A) -1 B) 2 C) -2 D) 1