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Lena [83]
1 year ago
11

Simply -3 3/4 divided by 2 1/2​

Mathematics
1 answer:
Dima020 [189]1 year ago
4 0

Answer:

=-1\frac{1}{2}

Step-by-step explanation:

Given the following question:

-3\frac{3}{4} \div2\frac{1}{2}

In order to find the answer, we first convert the mixed numbers into improper fractions. Then we use KCF (Keep, Change, Flip) and solve.

-3\frac{3}{4} \div2\frac{1}{2}
-3\frac{3}{4} =12+3=-\frac{15}{4}
2\frac{1}{2}=2\times2=4+1=\frac{5}{2}
-\frac{15}{4} \div\frac{5}{2}
-\frac{15}{4} \times\frac{2}{5}
15\times2=30
4\times5=20
=-\frac{30}{20}
-\frac{30}{20} \div10=-\frac{3}{2}
-\frac{3}{2}=3\div2=-1\frac{1}{2}
=-1\frac{1}{2}

Hope this helps.

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According to creditcard , the mean outstanding credit card debt of college undergraduate was $3173 in 2010. A researcher believe
Mamont248 [21]

Answer:

a. The null and alternative hypothesis can be written as:

H_0: \mu=3173\\\\H_a:\mu< 3173

b. A Type I error is made when a true null hypothesis is rejected. In this case, it would happen if it is concluded that the actual mean outstanding credit card debt of college undergraduate is significantly less than $3173, when in fact it does not.

A Type II error is made when a false null hypothesis is failed to be rejected. In this case, the actual mean outstanding credit card debt of college undergraduate is in fact less than $3173, but the test concludes there is no enough evidence to claim that.

Step-by-step explanation:

We have a prior study of the mean outstanding credit card debt of college undergraduate that states that it was $3173 in 2010.

A researcher believes that this amount has decreased since then.

Then, he has to perform a hypothesis test where the null hypothesis states that the mean is still $3173 and an alternative hypothesis that states that the actual credit card debt is significantly smaller than $3173.

The null and alternative hypothesis can be written as:

H_0: \mu=3173\\\\H_a:\mu< 3173

3 0
3 years ago
What number is 120% of 70
Lyrx [107]

Answer:

84

Step-by-step explanation:

70*1.2=84

7 0
3 years ago
What is ask for 7 (m+5)=21
DerKrebs [107]
I dont get what the question is do you need to solve it or?

8 0
2 years ago
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Answer:

6 {d}^{2} + 5cd - 3dc + 8

Step-by-step explanation:

b/c we can substructure 5cd and 3dc b/c it doesn't matter if the place of cd and dc change. what I mean if 5 ×3=15 and it is the same with 3×5=15 both of the product are the same but, if it is - and ÷ it wil be wrong for example 5-3=2 but 3-5= -2

if is helpful ❤❤

THANK YOU

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