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Tems11 [23]
3 years ago
15

A teacher asks 90 students who drive how many speeding tickets they received in the last year. predict the shape of the distribu

tion and explain. select the correct answer below.
a. the distribution will be​ left-skewed. most people will have at least one​ ticket, but there will be a few people with no tickets.
b. the distribution will be​ left-skewed. most people will have no​ tickets, but there will be a few people with​ 1, 2,​ 3, or more tickets.
c. the distribution will be​ right-skewed. most people will have no​ tickets, but there will be a few people with​ 1, 2,​ 3, or more tickets.
d. the distribution will be roughly symmetric. the number of people who have fewer tickets than the mean and the number of people who have more tickets than the mean is roughly equal.
e. the distribution will be​ right-skewed. most people will have at least one​ ticket, but there will be a few people with no tickets.
Mathematics
1 answer:
CaHeK987 [17]3 years ago
8 0
Primary sources contain information

A. with the advantage of hindsight and the perspective of an outside observer and may be more objective.
B. provided by someone who's been through an event. It's a firsthand account that lends a unique perspective.
C. on statistics gathered after an important historical event.
D. on psychological information gathered from raw data from psychological tests.
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The roots of 2x^2-3x=4 are a and b. Find the simplest quadratic equation which has roots 1/a and 1/b
Tju [1.3M]
Find the roots

solve
we use hmm, completing the suare
2(x²-1.5x)=4
divide both sides by 2
x²-1.5x=2
take 1/2 of linear coeiftn and square it
-1.5/2=-0.75, (-0.75)²=0.5625
add that to both sides
x²-1.5x+0.5625=2+0.5625
factor perfect squaer trinomial
(x-0.75)²=2.5625
square root both sides, remember to take positive and negative square roots
x-0.75=+/-√2.5625
add 0.75 to both sides
x=0.75+/-√2.5625

the roots are x=0.75+√2.5625 and x=0.75-√2.5625

1/a and 1/b
1/(0.75+√2.5625) and 1/(0.75-√2.5625)

if the roots of a quadratic equation are r1 and r2 then it factors to
(x-r1)(x-r2)
so then we can factor our equation to be
(x-\frac{1}{0.75+\sqrt{2.5625}})(x-\frac{1}{0.75-\sqrt{2.5625}})

if we were to try and expand it, we would get
x²+0.75x-0.5
that's the simpliest equation with roots 1/a and 1/b where a and b are he roots of 2x²-3x=4


x²+0.75x-0.5 is answer
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3 years ago
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Your answer would be 45
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A relation is plotted as a linear function on the coordinate plane starting at point C (0,−1)(0,−1) and ending at point D (2,−11
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To find the rate of change, or slope, pick two points. The slope, is change in y coordinates over change in x coordinates.
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In this case, the slope is 
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Remember that subtracting a negative number equals adding the number without the negative sign.
a-(-b) = a+b

Now for the y-intercept. The y-intercept is where the graph intersects the y-axis, where x = 0.
You have the coordinate (0, -1), where x = 0. So the y-intercept is -1.

Putting these values into the slope-intercept form y = mx+b, the equation is
y = -5x - 1
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The area of a rectangular field is 5695 m².
denpristay [2]

Answer:

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