The first 2 parts are correct
Third part is 40 %
If we represents a book's cost as x, that would mean that 5*x would represent the cost of 5 books (as x+x+x+x+x=5x) and 4x would be 4, resulting in 5x+4x=9x. After that, we get that 19 books is 19x as the cost, but since Agnus gets a 10 dollar discount, it's 19x-10. After that, to combine the two, we notice that Agnus still spends 5$ more than what they spent combined (9x) so we get that 9x+5=19x-10. Subtracting 9x from both sides, we get 10x-10=5. Adding 10 to both sides there, we get 10x=15 and we can divide 10 by both sides to get x=1.5
Answer:
Step-by-step explanation:
Sometimes the best thing you can do with this kind of question is just to graph it. The graph is below. Done on Desmos. It shows that the min is at (8,9)
So the answer is B.
Answer:
The answer is D(t) = 160 - 25t
Step-by-step explanation:
well khan academy said it lol
The points are at (8,0) and (0,6)