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3 years ago

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There are 40 students in a class, 12 girls and 28 boys. What is the probability of picking a girl out of the class and how likel

y is it that a girl would be chosen?

1 answer:

marusya05 [52]3 years ago

8 0

3/10 and 30% of the time

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ollegr [7]

The answer is 25 I think sorry if it’s wrong :)

3 0

2 years ago

Read 2 more answers

What is f–1(8)??<br><br> Please select the best answer

notka56 [123]

Answer:

$f^{-1}(8)=\frac{3}{2}$

Step-by-step explanation:

Given f(x)= $2x+5$

We have to find $f^{-1}(8)$

In order to find $f^{-1}(x)$ we have to make x as the subject of the formula

Let us assume f(x)=y

⇒ $2x+5=y$

Subtracting both sides by 5

$2x+5-5=y-5$

$2x=y-5$

Dividing both sides by 2

$\frac{2x}{2}=\frac{y-5}{2}$

⇒ $x=\frac{y-5}{2}$

Now substituting y with x

we have $f^{-1}(x)=\frac{x-5}{2}$

Now $f^{-1}(8)=\frac{8-5}{2}$

= $\frac{3}{2}$

So option (ii) is correct

5 0

2 years ago

Read 2 more answers

What is being displayed ?

sleet_krkn [62]

Answer: The answer is (2)

Just evaluate the functions with the values of the figure

4 0

3 years ago

Whats the linear equations of y=-2x+19

vodka [1.7K]

It would be a linear function

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3 years ago

About 70% of Earth’s surface is covered by water. If the diameter of Earth is about 12,750 km, find the area not covered by wate

hichkok12 [17]

Earth diameter = 12,750 km
Earth radius = 6,375 km
Sphere Surface Area = <span> 4 • <span>π <span>• r²
</span></span></span>Sphere Surface Area =    4 * 3.141<span>59 * 6375^2
</span>Sphere Surface Area =    4 * 3.14159 * <span> <span> <span> 40,640,625 </span> </span> </span>
<span> <span> <span> Earth's Entire </span></span></span><span>Surface Area =    510,704,724 square kilometers
Surface NOT covered by water = </span><span>510,704,724 * .3
</span>Surface NOT covered by water = <span> <span> <span> 153,211,417</span></span></span><span> square kilometers</span>

4 0

2 years ago