Answer:
swimming: 0,75h
biking: 1,6h
running: 1h
Step-by-step explanation:
Answer: 13 (and Sally will always be 3 years older than Jill)
Step-by-step explanation:
Let S and J stand for Sally and Jill's ages. We are told:
- (S-5) = (J-5)+3 [Sally is 3 years older than Jill was <u>5 years ago</u>] The 5 years ago is the reason for the (S-5) and (J-5) expressions.
If Jill is 10, how old is Sally?
(S-5) = (J-5)+3
(S-5) = (10-5)+3
S-5 = 8
S = 13
We actually don't really need an equation for solving this, other than the question asks us to write one. It doesn't matter how many years later, since Sally is 3 years older, she will always remain 3 years older, if we ignore the likelihood that the statement doesn't hold true for the period between their actual birthdays.
Answer:
The maximum width of the pool must be 38 ft
Step-by-step explanation:
Let
y -----> the length of the swimming pool
x ----> the width of the swimming pool
The perimeter of the swimming pool is
we have
substitute
Remember that
The perimeter of the pool must be no more than 120 feet
so
The inequality that represent this scenario is
Solve for x
therefore
The maximum width of the pool must be 38 ft
Answer:21
Step-by-step explanation:
