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11Alexandr11 [23.1K]
3 years ago
15

Taylor's grandpa has given him a rare stamp

Mathematics
1 answer:
LUCKY_DIMON [66]3 years ago
4 0

Step-by-step explanation:

i don't understand the question ..........

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The random variable X = the number of vehicles owned. Find the expected number of vehicles owned. Round answer to two decimal pl
Lelechka [254]

Answer:

The expected number of vehicles owned to two decimal places is: 1.85.

Step-by-step explanation:

The table to the question is attached.

E(X) =∑xp(x)

Where:

E(X) = expected number of vehicles owned

∑ = Summation

x = number of vehicle owned

p(x) = probability of the vehicle owned

E(X) = (0 * 0.1) + (1 * 0.35) + (2 * 0.25) + (3 * 0.2) + (4 * 0.1)\\E(X) = 0 + 0.35 + 0.50 + 0.60 + 0.4\\E(X) = 1.85

The expected number of vehicles owned is 1.85.

4 0
3 years ago
Barry answered 32 out of 40 questions correctly on his math test. what percent of the questions did he get correct
Mrrafil [7]

Answer:it would be 80%

Step-by-step explanation:

4 0
4 years ago
Read 2 more answers
Determine the amplitude (A), period (P), and phase shift (PS) of the function f(x)= 3sin(x-4)+9
Tpy6a [65]
ANSWER

D.
A=3,P=2\pi,PS=(4,9)

EXPLANATION

The given function is

f(x) = 3 \sin(x - 4) + 9

Comparing to the general form of a trigonometric sine function,

f(x) = A \sin(Bx-C)+D

A=3
The amplitude is absolute value of A

|A| = |3| = 3

B=1

The period is given by

p = \frac{2\pi}{ B}

p = \frac{2\pi}{ 1} = 2\pi

C=4

is a shift to the right of 4 units.

and

D=9

is an upward shift of 9 units

Therefore the phase shift is (4,9).

The correct answer is D
6 0
3 years ago
Find the values of b such that the function has the given maximum value.
gizmo_the_mogwai [7]
So, the equation has a leading term with a negative coefficient, and is a quadratic, meaning is a parabola opening downwards, so it goes up and up and up and then makes a U-turn then down down, so it has a maximum point, that is, at the vertex point

so.. where the dickens is the vertex at?
we're asked to make the vertex with a y-coordinate of 104, so the maximum value is 104

well
\bf y = {{ a}}x^2{{ +b}}x{{ +c}}\qquad 
\left(-\cfrac{{{ b}}}{2{{ a}}}\quad ,\quad  {{ c}}-\cfrac{{{ b}}^2}{4{{ a}}}\right)\\\\
-----------------------------\\\\
\textit{so we want }\implies {{ c}}-\cfrac{{{ b}}^2}{4{{ a}}}=104
\\\\
\textit{let's take a peek at your equation}\quad 
\begin{array}{ccccllll}
f(x)=&-x^2&+bx&-17\\
f(x)=&-1x^2&+bx&-17\\
&\uparrow &\uparrow &\uparrow \\
&a&b&c
\end{array}
\\\\
thus
\\\\
(-17)=\cfrac{b^2}{4(-1)}=104

solve for "b"
5 0
4 years ago
Find the area. Answer ASAP pls pls
Reika [66]

Answer:

139.5

Step-by-step explanation:

A= (a + b) /2 *h

A = ( 13 + 18) /2 *9

A = 31 / 2 * 9

A = 15.5 * 9

A = 139.5

3 0
3 years ago
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