Answer:
it is option 3
Step-by-step explanation:
-4(5p+3)
by opening brackets, you get
-20p -12
Okay so the first thing you need to do is move the all the variables to one side of the equal sign
Answer:
Step-by-step explanation:
(2):
First let's organise the data:
33 miles ... x mph ... 4h - downstream
33 miles ... y mph ... 7h - up the stream
x = 33/4 = 8.25 mph
y = 33/7 = 4.71 mph
(3)
P(x) = 
To find the amount of key rings sold when the profit is 5000$ we have to equate P(x) with 5, because in the problem the profit of the key rings is displayed in terms of thousands.

Since the number of keyrings sold has to be positive the only answer is 4 thousand key rings.
To estimate this, round 53 to 50 and 12 to 10. 50 times 10 will be roughly what? 500. that is the estimated answer. the real answer is 636.