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3 years ago

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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35 out of the 50 employees at the sports shop are part-time employees. What percentage of the employees at the sports shop work

ANTONII [103]

Answer:

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Step-by-step explanation:

Given Data:

Total Employees = 50

Part-Time Employees = 35

Formula:

Percentage of Part-Time Employees =

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=(35 / 50) x 100

=(0.7) x 100

= 70

The Percentage of Part-Time Employees is 70%.

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3 years ago

The table gives the relative frequencies of recipes that contains sugar and salt, contain at least one of those ingredients, or

tigry1 [53]

Answer-

The probability that a randomly selected recipe does not contain sugar, given that it contains salt is 22.4%

Solution-

The given table in the link shows the relative frequencies of recipes that contains sugar and salt, or contains at least one of those ingredients, or contains neither of those ingredients.

We have to find the conditional probability that the recipe doesn't contain sugar, given that it contains salt.

We know that, the conditional probability of occurrence of A given that B occurs is,

$P(A|B)=\frac{P(A\ and\ B)}{P(B)} =\frac{P(A\bigcap B)}{P(B)}$

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3 years ago

I need help on this problem ​

I need help on this problem