Answer:
175.9
Step-by-step explanation:
AL=2πrh=2·π·4·7≈175.92919 rounded to the nearest tenth would be 175.9
Answer:
Substitution property of equality
Step-by-step explanation:
Given
and 
Then

Required
State the property
From the list of options, (d) answers the question.
This is so because:
Substitution property of equality states that
If
then 
In other words, both can replace one another.
So if
, then 2y + 1 can be substituted for x in
So:
becomes

<em>Hence, it is substitution property of equality</em>
Might be terribly wrong since it's been a while that I've done fractions, but I got -11/20. Hope this helps!!!
15 because I do it like 12+3 because the 3 is negative