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riadik2000 [5.3K]
2 years ago
8

What is the solution of √x+ 12 =

Mathematics
1 answer:
ad-work [718]2 years ago
6 0

Answer:

<u><em>x₁ = 4</em></u>

<u><em>(x₂ = -3)</em></u>

Step-by-step explanation:

√(x + 12) = x

x + 12 = x²

x² - x - 12 = 0

Δ = 49

x = (1 ±√Δ)/2

x₁ = 4

x₂ = -3

the right solution is 4 this can be seen by inserting the solutions found in the starting equation

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Josiah bought 22 chicken wings for $26.40. How much would it cost for 9 wings?
cricket20 [7]

Answer:

it would cost $10.8 for 9 chicken wings.

Step-by-step explanation:

Cost of 22 chicken wings = $26.40

we have to find first, cost of 1 chicken wings

For that we divide both side by 22

cost of 22/22 chicken wings = $26.40/22 = 1.2

Thus, cost of 1 chicken wings = $1.2

to fins cost of 9 chicken wings

we multiply both sides by 9

cost of 1*9 chicken wings = $1.2*9

cost of 9 chicken wings = $10.8

Thus, it would cost $10.8 for 9 chicken wings.

7 0
3 years ago
A statistic is said to be unbiased if
xxMikexx [17]

Answer:

A statistic is said to be unbiased if the mean of its sampling distribution is equal to the true value of the parameter being estimated.

Step-by-step explanation:

A parameter is a number that describes the population.  

A statistic is a number that describes a sample.  

A statistic used to estimate a parameter is unbiased if the mean of its sampling distribution is exactly equal to the true value of the parameter being estimated. For example, the mean of a sample is an unbiased estimate of the mean of the population from which the sample was drawn.

A statistic is biased if its expected value is not equal to the parameter.

8 0
3 years ago
A proportional relationship is represented by the equation 2x = 18y. IF y = kx, where k is the constant of proportionality, find
ddd [48]
2x=18y
divide 2
x=9y
9y=x
divide by 9
y=1/9x

k=1/9
3 0
4 years ago
20 POINTS!! ASAP! PLS SHOW WORK!! TYY
astra-53 [7]

Step-by-step explanation:

<u>From the figure</u> :

Cos 57° = 19.3 / AB

AB = 19.3 / 0.54

<u>AB = 35.74 cm</u>

7 0
3 years ago
Need help on this question please
Natasha_Volkova [10]

Hello!


This question is an example of function composition.


Given, f(x) = 3x - 5, find f(x - 1). For this problem, we substitute x for (x - 1).


f(x - 1) = 3(x - 1) - 5

f(x - 1) = 3x - 3 - 5

f(x - 1) = 3x - 8


Therefore, the answer is choice D, f(x - 1) = 3x - 8.

5 0
4 years ago
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