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Dafna1 [17]
2 years ago
13

Mr. Sims received $3.36 in change from his grocery purchase. If the total amount of his purchase was $56.64, which equation and

solution best represent x, the amount of money Mr. Sims gave the cashier?
Answer choices: x + 56.64 = 3.36; x = 60
x + 56.64 = 3.36; x = 60

56.64 – x = 3.36; x = 60
56.64 – x = 3.36; x = 60

x – 56.64 = 3.36; x = 60
]

x + 3.36 = 56.64; x = 53.28
Mathematics
2 answers:
umka21 [38]2 years ago
8 0

Answer:

it’s the one that says x – 56.64 = 3.36; x = 60

Step-by-step explanation:

polet [3.4K]2 years ago
3 0

Answer:

The answer to your question is x – 56.64 = 3.36; x = 60  because He gave the cashier 60 dollars, and the cashier game him back 3.36 dollars. And 60-$56.64 = $3.36.

Step-by-step explanation:

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3 years ago
Louise begins factoring the polynomial, which has four terms.
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Louise wants to factorize completely the given polynomial 4x^{3}+12x^{2}+5x+15

Grouping first, second terms together and third, fourth terms together

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==4x^{2}(x+3)+5(x+3)

Taking (x+3) common from the given expression,

==(4x^{2}+5)(x+3) is the completely factored form.

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3 years ago
Suppose that 50 identical batteries are being tested. After 8 hours of continuous use, assume that a given battery is still oper
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5 0
3 years ago
In the past, the average age of employees of a large corporation has been 40 years. Recently, the company has been hiring older
Viktor [21]

Answer:

p_v =P(t_{(63)}>2.5)=0.0075  

If we compare the p value and the significance level given \alpha=0.05 we see that p_v so we can conclude that we have enough evidence to fail reject the null hypothesis, so we can conclude that the mean age is significantly higher than 45 years at 5% of significance.  

Step-by-step explanation:

1) Data given and notation  

\bar X=45 represent the mean height for the sample  

s=16 represent the sample standard deviation for the sample  

n=64 sample size  

\mu_o =40 represent the value that we want to test

\alpha=0.05 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 age is higher than 40 years, the system of hypothesis would be:  

Null hypothesis:\mu \leq 40  

Alternative hypothesis:\mu > 40  

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{45-40}{\frac{16}{\sqrt{64}}}=2.5    

P-value

The first step is calculate the degrees of freedom, on this case:  

df=n-1=64-1=63  

Since is a one right tailed test the p value would be:  

p_v =P(t_{(63)}>2.5)=0.0075  

Conclusion  

If we compare the p value and the significance level given \alpha=0.05 we see that p_v so we can conclude that we have enough evidence to fail reject the null hypothesis, so we can conclude that the mean age is significantly higher than 45 years at 5% of significance.  

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timofeeve [1]
We can't match events with probability if there is no events... do you have the events? 
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