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cestrela7 [59]
3 years ago
15

I need help on this problem ​

Mathematics
1 answer:
AlladinOne [14]3 years ago
4 0

Answer:

y² - 2y - 4x + 9 = 0 (*)

a = 1    b = -2    c = -4x + 9

Δ = b² - 4ac = 4 - 4(9 - 4x) = 4 - 36 + 16x = 16x - 32

if (*) have the solutions => Δ ≥ 0

⇔ 16x - 32 ≥ 0 ⇔ x ≥ 2

with x ≥ 2 => y = \frac{2+\sqrt{16x-32} }{2}=\frac{2+4\sqrt{x-2} }{2}=1+2\sqrt{x-2}

or y = 1-2\sqrt{x-2}

Step-by-step explanation:

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Ber [7]

Answer:

The answer is 2 cakes.

Step-by-step explanation:

What we know:

-Each cake requires 2 1/2 cups of sugar.

-Sheila has 7 1/3 cups of sugar.

What we need to know:

-How many cakes can Sheila make with 7 1/3 cups of sugar.

Remember:

-You must make a whole cake.

Show your work:

-I am going to convert the fraction into a decimal.

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3 years ago
Is f(x)= -2(3)^-x an increasing or decreasing function?
sattari [20]
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3 years ago
If the expression y2 – 16y + 64 is factored completely, which is one of its factors?
kari74 [83]

Answer:

b) y - 8 is one of the factor of the given expression

Step-by-step explanation:

<u><em>Explanation</em></u>:-

Given expression y² - 16 y + 64

                       ⇒    y² - 8 y - 8 y + 64

                       ⇒  y ( y- 8) - 8 ( y - 8)

                        ⇒ (y-8)(y-8)

Therefore  (y -8) is one of the factor

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Using proportions, it is found that 7% of the population has blue eyes without blonde hair.

10% of the population has blue eyes. These 10% are composed by:

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Hence, the relation according to the proportion of 10% is:

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x = \frac{0.1 - 0.75(0.04)}{0.96}

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Out of the entire population:

0.0729(0.96) = 0.07

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You can learn more about proportions at brainly.com/question/24372153

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