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WITCHER [35]
3 years ago
9

Consider the function f(x)=2|x|-3. What is f(-3)?

Mathematics
1 answer:
olganol [36]3 years ago
8 0

f(-3)=2|-3|-3=6-3=3\\f(-3)=3

Hope I helped and have a great day!

P.S. brainliest would really help im one away from virtuoso

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Independent random samples of vehicles traveling past a given point on an interstate highway have been observed on monday versus
quester [9]
Hi! 

To compare this two sets of data, you need to use a t-student test:

You have the following data:

-Monday n1=16; <span>x̄1=59,4 mph; s1=3,7 mph

-Wednesday n2=20;  </span>x̄2=56,3 mph; s2=4,4 mph

You need to calculate the statistical t, and compare it with the value from tables. If the value you obtained is bigger than the tabulated one, there is a statistically significant difference between the two samples.

t= \frac{X1-X2}{ \sqrt{ \frac{(n1-1)* s1^{2}+(n2-1)* s2^{2} }{n1+n2-2}} * \sqrt{ \frac{1}{n1}+ \frac{1}{n2}} } =2,2510

To calculate the degrees of freedom you need to use the following equation:

df= \frac{ (\frac{ s1^{2}}{n1} + \frac{ s2^{2}}{n2})^{2}}{ \frac{(s1^{2}/n1)^{2}}{n1-1}+ \frac{(s2^{2}/n2)^{2}}{n2-1}}=33,89≈34

The tabulated value at 0,05 level (using two-tails, as the distribution is normal) is 2,03. https://www.danielsoper.com/statcalc/calculator.aspx?id=10

So, as the calculated value is higher than the critical tabulated one, we can conclude that the average speed for all vehicles was higher on Monday than on Wednesday.



5 0
3 years ago
A five-pound bag of flour costs $2.90 and holds 10 cups. How much will
Jlenok [28]

Answer:

65 cents

Step-by-step explanation:

divide 10 by 2.25 to get the factor. Next divide 2.9 by that to get your answer. 10/2.25 = 4 4/9. 2.9/ 4 4/9 = 0.6525 --> 0.65

7 0
3 years ago
By definition, an expression does not contain
yarga [219]
By definition, an expression does not contain AN EQUALS SIGN (=).
3 0
3 years ago
What equation represents this sentence?
Anna007 [38]

Answer:

3-n=14

Step-by-step explanation less than a number!!! If a number is unkown it would be a variable, a letter,

3 0
2 years ago
Read 2 more answers
Pls can you help me here PLSSSS. it would mean a lot for me.
VLD [36.1K]

Answer:

27.183m. squared

Step-by-step explanation:

Find the base, then find the volume

Base:

(2.6*4.1*0.5)=

(10.66*0.5)=

5.33

Volume:

(5.33*5.1)=

27.183

Hope that this helped!

8 0
3 years ago
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