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Likurg_2 [28]
2 years ago
13

If y = x3 - 3 , find the value of y when x = -2

Mathematics
1 answer:
Contact [7]2 years ago
8 0
Y = (-2)3 - 3
Y = -6 - 3
Y= -9
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Evaluate piecewise functions
Vika [28.1K]

Answer:

F(4) = 9

Step-by-step explanation:

Notice that for f(4), we need to use the function definition for the partitioned Domain that includes x = 4, and that is the expression :

f(x) = x^2-7

Therefore:

f(4) = 4^2-7 = 16-7 =9

5 0
3 years ago
Decrease £120 by 45%
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120 * 45  % =  120 *0,45  =  54 £

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Simplify. (−5 p 4 z 6 u) 3
ser-zykov [4K]
In this expression, solve the multiplication in the parenthesis. 
-5×p×4×z×6×u
since multiplication is commutative, 
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5 0
3 years ago
The weights of soy patties sold by Veggie Burgers Delight are normally distributed. A random sample of 15 patties yields a mean
Elden [556K]

Answer:

t=\frac{3.8-4}{\frac{0.5}{\sqrt{15}}}=-1.549    

Step-by-step explanation:

Data given and notation  

\bar X=3.8 represent the sample mean

s=0.5 represent the sample standard deviation for the sample  

n=15 sample size  

\mu_o =4 represent the value that we want to test

\alpha represent the significance level for the hypothesis test.  

t would represent the statistic (variable of interest)  

p_v represent the p value for the test (variable of interest)  

State the null and alternative hypotheses.  

We need to conduct a hypothesis in order to check if the mean weight is less than 4 ounces, the system of hypothesis would be:  

Null hypothesis:\mu \geq 68  

Alternative hypothesis:\mu < 4  

If we analyze the size for the sample is < 30 and we don't know the population deviation so is better apply a t test to compare the actual mean to the reference value, and the statistic is given by:  

t=\frac{\bar X-\mu_o}{\frac{s}{\sqrt{n}}}  (1)  

t-test: "Is used to compare group means. Is one of the most common tests and is used to determine if the mean is (higher, less or not equal) to an specified value".  

Calculate the statistic

We can replace in formula (1) the info given like this:  

t=\frac{3.8-4}{\frac{0.5}{\sqrt{15}}}=-1.549    

3 0
3 years ago
Someone please help asap, I will mark as brainliest. Thank you!!
defon

Answer:

the answer is c go ahead and click it

Step-by-step explanation:

8 0
2 years ago
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