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sergiy2304 [10]
3 years ago
15

Y=143.3(5)^2+1823.3(5)+6820

Mathematics
2 answers:
marissa [1.9K]3 years ago
8 0

There were 12561 taxi accidents occurred in 1997

<h3>Further explanation</h3>

A quadratic function is a function that has the term x²

The quadratic function forms a parabolic curve

The general formula is

f (x) = ax² + bx + c

where a, b, and c are real numbers and a ≠ 0.

There are questions above that need to be completed

The number of taxi accidents is approximated by y equals negative 143.3 x squared plus 1823.3 x plus 6820 y = −143.3x2 + 1823.3x + 6820 and the number of injuries is approximated by y equals negative 416.72 x squared plus 4416.7 x plus 8500 y = −416.72x2 + 4416.7x + 8500. Let x equals = 0 represent 1990, x equals = 1 represent 1991, and so on.

According to the equation for the number of accidents, if the trend continues, how many taxi accidents occurred in

1997?

If we look at the value of x = 0 for 1990 and x = 1 for 1991, than the value of x = 7 for 1997.

We enter the value x = 7 in the equation:

 y = −143.3x² + 1823.3x + 6820

 y = −143.3 (7²) +1823.3 (7) +6820

y = -143.3 (49) + 12763.1 + 6820

y = -7021.7 + 19582.4

y = 12561.4, round up to 12561

<h3>Learn more</h3>

domain of the function

brainly.com/question/4135536

the inverse of the ƒunction

brainly.com/question/9289171

F (x) = x2 + 1 g (x) = 5 - x

htps: //brainly.com/question/2723982

Keywords: taxi accident, injuries

MA_775_DIABLO [31]3 years ago
6 0

As the question is written, the <em>correct answer</em> is:


19519.


Explanation:


Our question states

y = 143.3(5)² + 1823.3(5) + 6820


To evaluate this, we use the order of operations (PEMDAS). There is nothing to be evaluated in parentheses, so P is taken care of.


The E part, exponents, is 5². This is 25, which gives us:

y = 143.3(25) + 1823.3(5) + 6820


Next we have M and D, multiplication and division (in the order they appear). Our multiplication is:

143.3(25) = 3582.5; and

1823.3(5) = 9116.5.


This gives us:

y = 3582.5 + 9116.5 + 6820


Lastly, we add these:

y = 12699 + 6820

y = 19519

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Answer:

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Step-by-step explanation:

Data given and notation

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\hat p=\frac{46}{115}=0.4 estimated proportion of people that have traded in their old car

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Confidence=90% or 0.9

z would represent the statistic (variable of interest)

p_v represent the p value (variable of interest)  

Concepts and formulas to use  

We need to conduct a hypothesis in order to test the claim that the proportion is less than 0.48.:  

Null hypothesis:p\geq 0.48  

Alternative hypothesis:p < 0.48  

When we conduct a proportion test we need to use the z statistic, and the is given by:  

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Since we have all the info requires we can replace in formula (1) like this:  

z=\frac{0.4 -0.48}{\sqrt{\frac{0.48(1-0.48)}{115}}}=-1.717  

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The significance level provided \alpha=0.1. The next step would be calculate the p value for this test.  

Since is a left tailed test the p value would be:  

p_v =P(z  

So the p value obtained was a very low value and using the significance level given \alpha=0.1 we have p_v so we can conclude that we have enough evidence to reject the null hypothesis, and we can said that at 5% of significance the proportion of people that have traded in their old car is lower than 0.48 or 48%.  

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