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2 years ago

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There are 25 students names in a hat. You choose 5 names. Three are boys names and two are girls names.How many of the 25 names

would you expect to be boys names?

1 answer:

iren [92.7K]2 years ago

5 0

5 is the answer your prop

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If P(a)=0.60 and P(b)=0.30, then a and b are independent events if

MariettaO [177]

Answer: $\text{P(A or B)}=0.90$

$\text{P(A and B)}=0.18$

Step-by-step explanation:

Given : P(A)=0.60 and P(B)=0.30

We will say A and B are independent events if :

$\text{P(A or B)=P(A)+P(B)}\\\\=0.60+0.30=0.90$

$\text{P(A and B)=P(A) x P(B)}\\\\=0.60\times0.30=0.18$

Thus , A and B are independent events if :

$\text{P(A or B)}=0.90$

$\text{P(A and B)}=0.18$

4 0

3 years ago

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The figure below shows the graph of f ', the derivative of the function f, on the closed interval from x = -2 to x = 6. The grap

wolverine [178]

Answer:

x = -2

Step-by-step explanation:

From x = -2 to x = 5, f' is negative. That means f is decreasing.

From x = 5 to x = 6, f' is positive. That means f is increasing.

The negative area (between x = -2 and x = 5) is larger than the positive area area (between x = 5 and x = 6). That means f decreases more than it increases.

So f is an absolute maximum at x = -2.

6 0

2 years ago

A neighborhood was given a vacant lot in the shape of a rectangle on which to build a park. The neighborhood is considering how

Montano1993 [528]

Answer:

<em>The triangle and trapezoid area formulas have One-half in them.</em>

<em>In the trapezoid formula, the bases are added.</em>

Step-by-step explanation:

<em>Topic: Plane Shapes</em>

Basically, the requirement of the question is to compare area of shapes. The shapes are

Trapezoid
Triangle
Parallelogram
Rectangle

The Area of a Trapezoid is $(\frac{a + b}{2} )h$ where a and b are the bases of the trapezoid and h is the height

The Area of a Triangle is $\frac{bh}{2}$ where b and h are the base and the height of the triangle respectively

The Area of a Parallelogram is $b * h$ where b and h are the bases and the height of the parallelogram

The Area of a Rectangle is $l * b$ where l and b are the length and the breadth of the triangle respectively

Checking option a through e

A. The triangle and trapezoid area formulas have One-half in them.

True; Area of a Triangle is $\frac{bh}{2}$ while Area of a Trapezoid is $(\frac{a + b}{2} )h$

B. The parallelogram and rectangle formulas are both the same.

False; Area of a Parallelogram is $b * h$ while Area of a Rectangle is $l * b$

C. In the parallelogram formula, the bases are added.

False; The basis are not added

Area of a Parallelogram is $b * h$

D. In the trapezoid formula, the bases are added.

True; Area of a Trapezoid is $(\frac{a + b}{2} )h$

E. In the triangle formula, the sides are added, then multiplied by One-half.

False; Area of a Triangle is $\frac{bh}{2}$

4 0

2 years ago

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19's prime factorization is

Paladinen [302]

19 is a prime number, so the prime factorization is 1*19

8 0

2 years ago

12<br> Х<br> 18<br> x=<br> TO<br> This is 7th grade math

svlad2 [7]

What’s the math called?

3 0

2 years ago