Answer:
a. 0.9
b. y=0.9x, where y is the cost and x is the amount of songs.
c. She should use the package price from the online music vendor (the first option)
Step-by-step explanation:
a.
The constant of proportionality is k in y=kx. Take a point form the graph ( lets say (5,4.5) ) and sub it in:
y=kx
4.5=5k
k=0.9
b.
The equation of a line is y=kx when it passes though the origin (which this one does). We know the value of k, so our equation is y=0.9x, where y is the cost and x is the amount of songs.
c.
Susan downloads 60 songs monthly. We're being asked if it would be cheaper to use the service where you play $58 total, or $0.90 per song. So for the package price, let's figure out the total cost (y) for 60 songs (x=60):
y=0.9x
y=0.9(60)=$54
So it would be cheaper to use the package price from the online music vendor.
Answer:
the answer will be verified by an expert. Until then, talk to a tutor.
Answer:
yes, AA
Step-by-step explanation:
since both have 90 degree angles, and 62+28 is also 90, all 3 sets of angles are congruent
<u>First problem :</u>
probability to draw a red paper : 42/(42+18)=7/10
In 110 tries one can thus expect to draw 7/10*110=77 red papers
<u>Second problem :</u>
Since for 150 trials (which will give the least error) we have got 135 yellow balls, we can expect twice as much in 300=150*2 trials, which makes 270 yellow balls.
OPTION D
34.6 m is the correct answer.
