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Sergio039 [100]

3 years ago

10

Describe how to plot -3 3/4 on a number line?

2 answers:

rodikova [14]3 years ago

8 0

-3 would be before the zero and the point would be on the 3.3 on the line

Dvinal [7]3 years ago

8 0

On the number line, negative numbers go to the left. Since -3 3/4 is negative, go 3 spaces to the left.

When plotting a fraction or decimal on a number line, you need to estimate. If there are half marks in between the numbers, plot the point near the half mark. If it's -3 3/4, count 3 spaces, then go to the half mark of -3 to -4, and plot the 3/4 in between the -3 and -4 half mark. If there is no half mark, place it near the -4 mark.

The red line represents the half mark, the blue line represents where the point would go. Notice how when negative, the numbers go higher as they go left.

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Let X denote the temperature (degree C) and let Y denote thetime in minutes that it takes for the diesel engine on anautomobile

BlackZzzverrR [31]

Answer:

Step-by-step explanation:

Given $f_{XY} (x,y) = c(4x + 2y +1) ; 0 < x < 40\,and\, 0 < y$

a)

we know that $\int\limits^\infty_{-\infty}\int\limits^\infty_{-\infty} {f(x,y)} \, dxdy=1$

therefore $\int\limits^{40}_{-0}\int\limits^2_{0} {c(4x+2y+1)} \, dxdy=1$

on integrating we get

c=(1/6640)

b)

$P(X>20, Y>=1)=\int\limits^{40}_{20}\int\limits^2_{1} {\frca{1}{6640}(4x+2y+1)} \, dxdy$

on doing the integration we get

=0.37349

c)

marginal density of X is

$f(x)=\int\limits^2_{0} {\frca{1}{6640}(4x+2y+1)} \, dy$

on doing integration we get

f(x)=(4x+3)/3320 ; 0<x<40

marginal density of Y is

$f(y)=\int\limits^{40}_{0} {\frca{1}{6640}(4x+2y+1)} \, dx$

on doing integration we get

$f(y)=\frac{(y+40.5)}{83}$

d)

$P(01)=\int\limits^{40}_{0}\int\limits^2_{1} {\frca{1}{6640}(4x+2y+1)} \, dxdy$

solve the above integration we get the answer

e)

$P(X>20, 0$

solve the above integration we get the answer

f)

Two variables are said to be independent if there jointprobability density function is equal to the product of theirmarginal density functions.

we know f(x,y)

In the (c) bit we got f(x) and f(y)

f(x,y)cramster-equation-2006112927536330036287f(x).f(y)

therefore X and Y are not independent

4 0

3 years ago

HELP ME WITH 9, 11, 12

mart [117]

Answer:

<u>Question 9</u>

Name the ordered pairs in the table: 3, 4, 5, 6, 7

Ordered pairs: (1,3), (2,4), (3,5), (4,6), (5,7)

Graph the equation: the attachment

Step-by-step explanation:

I don't know how to do questions 11 and 12.

Also sorry if these aren't correct.

8 0

3 years ago

What is $360 divided by $178

Nikolay [14]

See picture reply for answer.

3 0

3 years ago

Read 2 more answers

Alan is modeling 2.65 divided by 5. How should he exchange the place-value blocks so he can make 5 equal shares? Please explain

valkas [14]

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3 years ago

A + b= 7<br>a - b = 3<br><br>Plz help I'm confuse

Maslowich

Answer:

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Step-by-step explanation:

$a = 3 + b \\ 3 + b + b = 7 \\ b = 2$

$a = 2 + 3 = 5$

6 0

3 years ago