2 years ago

Y=3x-5\6x+3y=15 solve for x hurry

Mathematics

1 answer:

Lady bird [3.3K]2 years ago

3 0

Answer: x= 2

how i solved: (in photo)

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F(x)= 9-x^2, x ≥ 0. f^-1(x)=??

julia-pushkina [17]

$y=9-x^{2},\ x\ge0$

Reverse $x$ and $y$ :
$x=9-y^{2},\ y\ge0$
Solve for $y$ :
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$\rightarrow y^{2}=9-x$
$\rightarrow y=\sqrt{9-x}$ since $y\ge0$

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2 years ago

Sales rise from £400 a week to £504 a week. Calculate a percentage increase

soldier1979 [14.2K]

Step-by-step explanation:

previous =£400

present=£504

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2 years ago

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posledela

Total number of marbles = 10

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Number of blue marbles = 6

Probability = $\frac{number of favorable outcomes}{total number of outcomes}$

The probability that the first marble is blue = $\frac{6}{10}$

The probability that the first marble is red = $\frac{4}{9}$ ; 9 because 1 marble has already been taken out.

Joint probability= probability of event A * Probability of event B

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lidiya [134]

There is a 40% chance that the randomly selected child will have a speaking part.

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