Answer:
44 + 47
= (41 + 3) + 47
= 41 + (3 + 47)
= 41 + 50
= 91
Step-by-step explanation:
So, essentially what is happening is you are making the 47 a 50 so it is easier to add.
Answer:
Expected value =0.9
Standard deviation = 0.4359
Step-by-step explanation:
Let's use the formula to find expected value or mean.
Expected value =Σ x *P(x)
x 0 1 2
P(x) ) .15 .8 .05
So, expected value = (0)(0.15) +1(0.8)+2(0.05)
= 0 +0.8 +0.1
=0.9
Expected value =0.9
Now, let's find standard deviation
x
![(x-E(x))^{2} *p(x)](https://tex.z-dn.net/?f=%28x-E%28x%29%29%5E%7B2%7D%20%2Ap%28x%29)
0
=0.1215
1
=0.008
2
=0.0605
Now, add the last column together and then take square root to find standard deviation.
Standard deviation of the distribution =![\sqrt{0.1215+0.008+0.0605)}](https://tex.z-dn.net/?f=%5Csqrt%7B0.1215%2B0.008%2B0.0605%29%7D)
Simplify it, so standard deviation =0.4358898...
Round the answer to nearest four decimal places
Standard deviation = 0.4359
Answer: y-intercept is 1
Step-by-step explanation: it's one because it is on the y-axis.
Answer:
proportional
Step-by-step explanation:
proportional
48/3 = 16
42/3 = 14
The answer is: {C]: "constant speed; 35 mi/h" .
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Explanation:
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Examine the graph provided; and examine the answer choices given.
When x = 1 ; (and the x-axis represent time in "h" (hours) ) ;
y = 35 (miles).
Even if you can't tell that it is EXACTLY 35 mi; it is closer to "35 mi" (after 1 hour); i.e "35 mi / h" than the other answer choices provided:
(i.e. "17.5 mi/ hr" ; and "70 mi./hr").
Furthermore, since the line is straight; we can determine that the speed is "constant" .
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