Answer:
Well, when adding and subtracting negatives
You can change the symbol and positive or negative of the second number like
2 + (-1) is equal to 2 - 1
So
23 + 20 = 43
Therefore, 23 -(-23) = 43 because when you take away a debt you add to your balance.
Answer:
Use the fact that sin(x) = opp/hyp and tan(x) = opp/adj
where opp=opposite, hyp=hypotenuse, adj=adjacent and recall sin(30)=1/2 and tan(30) = 1/sqrt(3)
sin(30) = 1/2 = 17/y
y = 17(2) = 34
tan(30) = 1/sqrt(3) = 17/x
x = 17sqrt(3)
So the answer is (d)
Note that you could have also use the Pythagorean theorem to find x instead of using tan(30).
84 gallons/(2.8 gpm) = 30 minutes
the 10 ounce drink is a better deal. it costs less per ounce.
