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Vlad1618 [11]
3 years ago
7

Answers to questions 15,19,20,21 &25

Mathematics
1 answer:
GarryVolchara [31]3 years ago
7 0

Answer:

The answer to your question is below

Step-by-step explanation:

15. x² = 144

    x = √144

   x = ± 12

19. 9x² = 4

      x² = 4/9

      x = √4/9

    x = ± 2/3

20.

      25y² = -16

          y² = -16/25

          y = √-16/25

          y = ± 4/5 i

21. 16y² = 25

        y² = 25/16

        y = √25/16

        y = ±5/4

25.

       81 - 9x² = 0

       81 = 9x²

       81/9 = x²

         9 = x²

       √9 = x

        x = ± 3

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andrey2020 [161]

Answer:

Hey! The answer is 25,4 centimeters.

Step-by-step explanation:

In a linear function you can use y=mx+n

So if x = hours and y= height.

You know that

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So:

If you multiply (24,8=26m +n) x-1

It is: -24,8 = -26m -n

Adding up the other equation

-24,8 = -26m -n

<u>27,8 = 11m + n</u>

<u>3 = -15m</u>

<u>m= -0,2</u>

So

27,8 = 11 x 0,2 + n

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y = -0,2x + 30

The answer is

y=23(-0,2) + 30

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8 0
3 years ago
A company that manufactures toothpaste is studying five different package designs. Assuming that one design is just as likely to
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20%

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Use the compound interest formulas A = Pert and A = P(1 + ) to solve. Suppose that you have $11,000 to invest. Which investment
gulaghasi [49]

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Compounded continuously:

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I will mark you as a brainliest!
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2 years ago
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