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iren2701 [21]
3 years ago
5

Can someone help with these? 17 PT + BRainliest

Mathematics
1 answer:
Novay_Z [31]3 years ago
6 0
<h3>Answer:</h3>

29. e = D/(3f²)

30. k=-4, x=41 . . . . matches the 2nd selection

<h3>Step-by-step explanation:</h3>

29. Multiply by the inverse of the coefficient of e. That coefficient is 3f², so you divide by that quantity.

... D = e(3f²)

... D/(3f²) = e . . . . . matches the first choice

___

30. You want to solve for k and use it with a different y-value.

... y = kx

... -96 = k·24

... -96/24 = k = -4

For y = -164, you have

... -164 = -4·x

... -164/-4 = x = 41

The coefficient of variation is -4, x is 41.

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6 0
3 years ago
Read 2 more answers
You need a 90% alcohol solution. On hand, you have a 55 mL of a 45% alcohol mixture. You also have 95% alcohol mixture. How much
Molodets [167]

Answer:

495 milliliters of the 95% mixture are needed.

Step-by-step explanation:

Given that I need a 90% alcohol solution, and on hand I have a 55 ml of a 45% alcohol mixture, and I also have 95% alcohol mixture, to determine how much of the 95% mixture will I need to add to obtain the desired solution, the following calculation must be performed:

55 x 0.45 + 45 x 0.95 = 67.5

25 x 0.45 + 75 x 0.95 = 82.5

15 x 0.45 + 85 x 0.95 = 87.5

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Thus, 495 milliliters of the 95% mixture are needed.

5 0
3 years ago
Simplify 3/2 (x+3/4) - (x+1)
fiasKO [112]

Answer:

If I had to guess, it would be the first option. Any calculator program I put it into is giving me 4x+1/8

Step-by-step explanation:

Sorry I wasn't able to help much, good luck though!

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Because 1 minute is 60 seconds, and it takes 12 seconds to download 8 apps, the first thing we need to do is find out how many "sets" of 12 seconds can go in 60 seconds:

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8 · 5 = 40

So, it would take Deandre 1 minute to download 40 apps.

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