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juin [17]
3 years ago
5

When adding integers with the same sign, you ___ the numbers and ____ the sign.

Mathematics
1 answer:
fredd [130]3 years ago
8 0

(I)

we are given when we add numbers of same sign

For exp: +2+3=+5

-2-3=-5

We can see that we are adding numbers and then we put same sign in front

so, we can fill spaces

When adding integers with the same sign, you add the numbers and put the sign

(II)

we are given when we add numbers of different signs

For exp: 2-3=-1

-2+3=+1

We can see that we are subtracting numbers and then we put sign of largest value in front

so, we can fill spaces

When adding integers with different signs you subtract the numbers and use the sign of the largest absolute value

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Which inequality is a true statement?
Shtirlitz [24]
None, the only correct answer is...

-2 > -12

... in negative integers, the smaller the magnitude the bigger it is.
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3 years ago
A nationwide study of American homeowners revealed that 65% have one or more lawn mowers. A lawnequipment manufacturer, located
GenaCL600 [577]

Answer:

z=\frac{0.684 -0.65}{\sqrt{\frac{0.65(1-0.65)}{497}}}=1.589  

p_v =P(z>1.589)=0.056  

If we compare the p value obtained with the significance level assumed \alpha=0.05 we see that p_v>\alpha so we can conclude that we have enough evidence to FAIL to reject the null hypothesis, and we can said that at 5% of significance the proportion of homes in Omaha with one or more lawn mowers is not ignificantly higher than 0.65

Step-by-step explanation:

Data given and notation

n=497 represent the random sample taken

X=340 represent the homes in Omaha with one or more lawn mowers

\hat p=\frac{340}{497}=0.684 estimated proportion of homes in Omaha with one or more lawn mowers

p_o=0.65 is the value that we want to test

\alpha represent the significance level

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 true proportion of homes in Omaha with one or more lawn mowers is higher than 0.65.:  

Null hypothesis:p\leq 0.65  

Alternative hypothesis:p > 0.65  

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

z=\frac{\hat p -p_o}{\sqrt{\frac{p_o (1-p_o)}{n}}} (1)  

The One-Sample Proportion Test is used to assess whether a population proportion \hat p is significantly different from a hypothesized value p_o.

Calculate the statistic  

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

z=\frac{0.684 -0.65}{\sqrt{\frac{0.65(1-0.65)}{497}}}=1.589  

Statistical decision  

It's important to refresh the p value method or p value approach . "This method is about determining "likely" or "unlikely" by determining the probability assuming the null hypothesis were true of observing a more extreme test statistic in the direction of the alternative hypothesis than the one observed". Or in other words is just a method to have an statistical decision to fail to reject or reject the null hypothesis.  

The next step would be calculate the p value for this test.  

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

p_v =P(z>1.589)=0.056  

If we compare the p value obtained with the significance level assumed \alpha=0.05 we see that p_v>\alpha so we can conclude that we have enough evidence to FAIL to reject the null hypothesis, and we can said that at 5% of significance the proportion of homes in Omaha with one or more lawn mowers is not ignificantly higher than 0.65

7 0
3 years ago
A recipe for cookies calls for 1 cup of butter,
GarryVolchara [31]

Answer:

3 cups

Step-by-step explanation:

the original recipe calls for 6 cups of flour (3 times as much as sugar. sugar is 2 cups, times 3 is 6)

half it: 6/2 = 3

4 0
2 years ago
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9. Mountain View School has a population of 589 students. Ocean View School has a population of 735 students.
erastova [34]

Answer:

20%

Step-by-step explanation:

CORRECT ME IF IM WRONG 735 - 589 is 146 so you just figure out that 20% of 735 is 588 = and thats the closest you will get to it

8 0
2 years ago
How do u delete a post on here?
alukav5142 [94]

Answer:

You cant

Step-by-step explanation:

X=EAH Square uppercut 2

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3 years ago
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