Answer:
6 tons
Step-by-step explanation:
we need to find what 1/7th of 42 is
so
42/7=6
so 6 tons are above water
hope this helps!
Answer:
10text=5weeks
by dividing both sides by5
2text=1week
1week=2text
by multipy both sides by 7
7weeks=14exams
so he will take 14exams in 7 weeks
Answer:
the answer for this question is a
Answer:
36.5
Step-by-step explanation:
If you take 16 and devide by 2 and add 13 you get 21 then do the same thing to 21 and you get 23.5 then lastly do it again to 23.5 and get 36.5
Speeds are s_c for car, s_m for motorcycle.
time is 2
distance of car is:
d_c = d_m + 20, d_m is distance of motorcycle.
speed is defined as:
s = d/t, distance over time.
hence:
d_c/2 = s_c = d_m/2 + 10
s_c = s_m + 10
from problem statement we know:
s_c = 2s_m - 30
so we have 2 simultaneous equations:
<span>s_c = s_m + 10
</span><span>s_c = 2s_m - 30
</span>
multiply second by -1 and sum them both:
<span> s_c = s_m + 10
</span>-s_c = -2s_m + 30
-------------------------
0 = -s_m + 40
s_m = 40
that is the speed of the motorcycle
s_c = <span>s_m + 10
</span> s_c = 40<span> + 10
</span>s_c = 50
that is the speed of car, both speeds in miles per hour