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3 years ago

Please pretty please help me with all 6, I will mark smartest correct answer worth lots of point!!! :)) love youu

Mathematics

2 answers:

Alexxandr [17]3 years ago

8 0

1. C, 5/8 is 0.625
2.D, 7/9 is 0.77777777777777777777.........
3.D, 7/8 is 0.875
4.b, 3/4 is 0.75
5.B, 5/11 is 0.4545454545454545.......
6.A, 2/9 is 0.222222222222222222......

abruzzese [7]3 years ago

6 0

C,d,a,b,b,a

Hope this helps!

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Please help me solve !!!!!!!!!!!!!!!

Dima020 [189]

Answer:

4x - 3y = 4

-3x + 3y = -6

x = -2

-2 - y = 2

-y = 4

y = -4

(-2,-4)

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3 years ago

The diagonals of rectangle NOPQ intersect at point R. If OR=3x-4 and NP=5x+20, solve for x.

zhuklara [117]

D) 28 is the right answer
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3 years ago

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Enter an equation that can be used to solve this problem, where x represents the number of hours that Roberto had been traveling

nalin [4]

45mph x35 mph = 1 hour

6 0

3 years ago

The length of a rectangle is 59 inches greater than twice the width. If the diagonal is 2 inches more than the length, find the

Paul [167]

So.. hmm notice the picture here

we know the length is 59 more than twice the width,
twice the width, 2 * w, or 2w
59 more than that
2w + 59

we also know that, whatever that is, the diagonal of it is,
2 more inches than that, or
(2w + 59) + 2

now.. use the pythagorean theorem
$\bf c^2=a^2+b^2\implies \qquad 
\begin{cases}
a=2w+59\\
b=w\\
c=(2w+59)+2\to 2w+61
\end{cases}
\\\\\\
(2w+61)^2=(2w+59)^2+(w)^2
\\ \qquad\qquad \uparrow\qquad \qquad\qquad \qquad \uparrow \\
\textit{expand using binomial theorem, or FOIL}$

you'd end up with a quadratic, after simplifying, solve for "w"

7 0

3 years ago

A player at a fair pays Rs. 100 to roll a dice. The player receives Rs. 50 if the number of dots facing up is equal to 5, Rs. 20

FinnZ [79.3K]

Answer:

The dice has 6 options:

if the outcome is 5, player wins 50

if the outcome is 6, player wins 200

if the outcome is another number, the player does not win anything.

Now, remember that the expected value can be written as:

E = ∑xₙpₙ

where xₙ is the event n, and pₙ is the probability of that event.

for a dice, the probabilty for each number is 1/6

The expected value is:

E = (1/6)*(0 + 0 + 0 + 0 + 50 + 200) = 41.66

The expected gain will be E - 100 (because the player pays 100 in order to play)

Then the expected gain is:

G = 41.66 - 100 = -58.33

The standard deviation can be written as:

s = √( ∑(x - x)^2/n)

where x is the mean, in this case the mean is:

(200 + 50 + 4*0)/6 = 41.66 and n = 6.

s = √( (1/6)*(4*(0 - 41.66)^2 + (50 - 41.66)^2 + (200 - 41.66)^2) ) = 73

So we have a lot of standard deviation on Y.

5 0

3 years ago