Answer:
A. The global mean temperature has gone up while the global pirate population has gone down.
Step-by-step explanation:
These two variables, the global mean temperature and the global pirate population, do not cause a change in the other. A decrease in the number of pirates, while it may coincide with an increase in the global temperature, is not caused by the change in temperature.
Similarly, an increase in the global temperature, while it may coincide with a decrease in the number of pirates, is not caused by having fewer pirates.
So tripple of 3/4 is 3/4 times 3/1=9/4=2 and 1/4
so 1 and 5/8
1 ad 5/8+x=2 and 1/4
2=1+1
1=8/8
1/4=2/8
8/8+2/8=10/4
1 and 5/8+x=1 and 10/8
subtract 1 from both sides
5/8+x=10/8
subtract 5/8 from both sides
x=5/8
she must borrow 5/8 cups
Answer:
you can find the answer if you look through something called googl3 Step-by-step explanation:
Let the running speed if Daniel be r mph, then his biking speed is (r+3) mph, because "His running speed is 3 mph slower than his biking speed. "
let the time it took Daniel to get to his friend's house be t hours, then the time it took him to go to his house, from his friend,s house is (2-t) hours , because "His total running and biking time is 2 hours."
the main formula we need to solve this problem is:
Distance=Speed*Time
Daniels biking speed, (r+3) , is Distance/Time=2/(2-t)
so (r+3)=2/(2-t)
we also have the equation 5=rt, because
"Daniel leaves school and runs 5 miles to his friend's house"
we substitute t, by 5/r in the previous equation:
(r+3)=2/(2-t)
(r+3)=2/(2-5/r)
(r+3)(2-5/r)=2
2r-5+6-15/r=2
2r-1-15/r=0
multiply by r:
2r^2-r-15=0
the expression in the left side can be factorized as (2r+5)(r-3), so the equation becomes:
(2r+5)(r-3)=0,
and the roots are r=-5/2, which is not possible in our problem,
and r=3
Daniel's biking speed is r+3=3+3=6 (mph)
Answer: 6 mph