Answer:
This problem is a great systems of equations problem--you have two different variables: song size and number of songs.
Let's call the number of standard version downloads (S) and the high quality downloads (H).
You can make two statements:
For number of songs downloaded: S + H = 910
For download size: 2.8(S) + 4.4(H) = 3044.
S will be the same number in both equations and H will be the same number in both equations, so to find S, we can rearrange the first statement to H = 910 - S, then substitute or plug in (910 - S) wherever you see an H in the second equation so that you have only S's in your equation. Should look like this:
2.8(S) + 4.4(910 - S) = 3044
2.8S + 4004 - 4.4S = 3044
-1.6S = -960
s = 600
Your question only asks for the standard version downloads, but to help you out in future Systems situations-
You can also solve for H once you have S by plugging it into either of your equations like this:
600 + H = 910
-600
H=310
Step-by-step explanation:
hope it help
*comment if my answer is wrong*
4/25
Step-by-step explanation:
16/100, 8/50, 4/25
Answer:
Equation for line h y = -2x +7
Step-by-step explanation:
Since the lines are parallel, their slope (m) must be the same.
Since they are in the form y=mx+b lets plug in the x and y values of line h.
y=mx+b
9= -2(-1) +b
9 = 2 + b
b = 7
lets plug this into the original equation.
y = -2x +7
Answer: 144 inches left
Step-by-step explanation: 25-13=12
12feet x 12inches(since there are 12 inches in a foot)= 144 inches
