Ask your parents about it if they didn't help you can copy mine,
Well I asked my parents about they told me that around their age there weren't lots of facilities they even rarely saw transportation facilities like cars and bikes there were no proper internet facilities e.t.c
When I said them what were the changes in the last 25 years they said there were drastic changes including social, economic, science, transportation, health e.t.c and many more
Answer:
See below
Step-by-step explanation:
Givens
Jenny's Stats
t = m - 2
d = 60 miles
r = r1 + 10
Maureen's stats
d = 50 miles
t = m
r = r1
=======
60 = (r1 + 10) * (m - 2)
50 = r1 * m
m = 50/r1
60 = (r1 + 10)* (50/r1 - 2)
60 = 50 + 500/r1 - 2r1 - 20
60 = 30 + 500/r1 - 2r1
60r1 = 30r1 + 500 - 2*r1^2
30r1 = 500 - 2r1^2
2r1^2 + 30r1 - 500
This quadratic factors into
2 (r1 - 10)(r1 + 25)
r1 = 10 mph The 25 has no meaning.
m = 50/r1
m = 50/10
m = 5 hours
m - 2 = 3 hours.
Step one: common denominators ex. 25/100, 79/100
step two: add the numerators and keep the denominators the same (addition)
step three: biggest fraction first!! subtract the numerators keep the denominators the same (subtraction)
step four: have a nice time with fractions
28(7) + 30(25) = 946 square inches
hope this helps!!
Answer:
8-4
Step-by-step explanation:
Since x equal 1 for now. The first step you do is x plus 3 which equal 4. Then do 2 time 4 which is 8. 8 equal the x so the answer is 8-4