Answer:
estimate = 90/150 = 6/10 students chose longer days, four days a week.
Step-by-step explanation:
To increase the confidence, you could interview even more students.
i hope this helps, i haven't done this in school in a while!
:)
Answer:
2 miles
Step-by-step explanation:
Their combined speed (speed of closure) is 80 mph + 40 mph = 120 mph.
120 mi/h = 120 mi/(60 min) = 2 mi/min
The distance between the trains at the 1-minute mark is ...
(1 min) · (2 mi/min) = 2 mi
They were warned when two miles apart.
18×4=72=4 hats
26-18=8=1 poster
8+8+72=88=4 hats and 2 posters
72=4 hats
72÷4=18= 1 hat costs $18
16÷2=8= 1 poster costs $8
There is one solution.
Just divide the 2nd line by two to get -2x + y= 3, then put it in slope-intercept to get y= -2x + 3
THen
y=2x+3
y= -2x + 3 subtract
4x=0
so x=0
plug in 0 for x
y= 2(0) +3
so y =3.
plug in to check
3=0+3 checkmark
-4(0) +2(3) = 6 checkmark
Answer:
Distribute 1.2 to 6.3 and -7x
Combine 3.5 and 7.56
suhtract 11.06 from both sides