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Keith_Richards [23]
3 years ago
5

What is the answer to this?​

Mathematics
1 answer:
kherson [118]3 years ago
7 0

s = standard version amount

h = high quality version amount

we know that there were 1090 downloads of the song, meaning s + h = 1090.

we also know that the total amount of MBs downloaded was 3353 MBs, and since the standard is 2.1 MBs and the high quality is 4.9MBs, then 2.1s + 4.9h = 3353.

\begin{cases} s+h=1090\\ 2.1s + 4.9h = 3353\\[-0.5em] \hrulefill\\ h = 1090 - s \end{cases}\qquad \stackrel{\textit{substituting on the 2nd equation}}{2.1s+4.9(1090-s) = 3353} \\\\\\ 2.1s + 5341 - 4.9s = 3353\implies -2.8s + 5341 = 3353 \\\\\\ -2.8s=-1988\implies s = \cfrac{-1988}{-2.8}\implies \boxed{s = 710}

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Angela enjoys swimming and often swims at a steady pace to burn calories. At this pace, Angela can swim 1,700 meters in 40 minut
geniusboy [140]
1700÷40= 42.5 

step one: you divide 40 into 1700
step two: you find the closest number that goes into 1700 which is 4 so 40×4= 160
step three: then you subtract 1700 from 160 and you'll get 100
step four: then you'll find the closest number that goes into a 100 and that will be 2 so 40×2=80
step 5: you'll then subtract 100 from 80 and you'll get 20 
step 6: you when then add a decimal and add an extra 0 to 1700 so you will now have 17000 you will bring down the 0 to make 20 into 200 and you will find the closest number that will go into 200 which will be 5 cause 40×5= 200 so you're answer will be 42.5units

7 0
3 years ago
I need help what is 1/3x-3?​
lilavasa [31]

Answer:

\frac{1}{3}x-3=\frac{x}{3}-3

Step-by-step explanation:

\frac{1}{3}x-3\\\\\frac{1}{3}x = \frac{x}{3}  \\\\Find\:L.C.M.\\\\=\frac{x}{3}-3

8 0
3 years ago
/<img src="https://tex.z-dn.net/?f=%5Cfrac%7Bx-9%7D%7B15%7D%20%3D%5Cfrac%7B2x-9%7D%7B10%5C%5C%7D" id="TexFormula1" title="\frac{
motikmotik

Step-by-step explanation:

\frac{x - 9}{15}  =  \frac{2x - 9}{10}  \\

\frac{x - 9}{3}  =  \frac{2x - 9}{2}  \\

2( x - 9) = 3(2x - 9) \\

2x - 18 = 6x - 27

27 - 18 = 6x - 2x

9 = 4x

x =  \frac{9}{4} \\

5 0
2 years ago
Solve the system by substitution. y = 8x + 32 Y= -8x​
leonid [27]
The answer is (x,y) = (-2, 16)

do you need an explanation as well?
6 0
2 years ago
An acute angle θ is in a right triangle with sin θ = five sixths. What is the value of cot θ?
Molodets [167]
<span>The value of cot is √13/6</span>
6 0
3 years ago
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