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fenix001 [56]
3 years ago
15

Two months ago perry has 554 rocks in his collection. He added 47 rocks to his collection last month and 39 to his collection th

is month. He decided to divide them all into 8 equal groups. How many rocks will be in each group?
Mathematics
1 answer:
Katarina [22]3 years ago
6 0

Answer:

80 in each group

Step-by-step explanation:

554+47 = 601 (47 last month)

601+39 = 640 (39 this month)

640 / 8 = 80 (8 equal groups)

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1) Which one of these four numbers has the greatest absolute value? (SELECT ONE answer)70-11-7
GalinKa [24]

Answer:

70

Step-by-step explanation:

70 has the greatest absolute value because absolute value is the amount between that number and 0. If 70 is the biggest number the with the biggest absolute value is 70.

7 0
3 years ago
5d-2/3c if d =4 and c =3 evaluate fast fast
Mademuasel [1]

Answer:

2

Step-by-step explanation:

Plug 4 in for d and 3 in for c

5d-2/3c

5(4)-2/3(3)

Multiply in the numerator and the denominator

20-2/9

Subtract in the numerator

18/9

2

Hope this helps! :)

4 0
3 years ago
Subtract:<br>4 4/9-2 7/9<br>​
defon

The answer is

1 2/3:

3 0
4 years ago
Read 2 more answers
When determining how well an observed set of frequencies fits an expected set of frequencies, what is the test statistic
sergij07 [2.7K]

Answer: \chi^2 test statistic.

Step-by-step explanation:

The chi-square (\chi^2  ) test is a non-parametric statistical test(also known as Goodness of fit test) which is used to determine if a distribution of observed frequencies differs from the expected frequencies.

Chi-square statistic uses either nominal (categorical) or ordinal level data.

Hence, When determining how well an observed set of frequencies fits an expected set of frequencies, the test statistic is \chi^2 test statistic.

6 0
3 years ago
It rained 18 days during the month of April what percentage of day did it not rain during the month of April
kotykmax [81]
There are 30 days in April.

If 18 days had rain, it means 12 didn't.

18/30=x/100

Make sure both fractions can be made into fractions with a denominator of 100:

180/300=x/100

Divide 180/300 by 3:

60/100=x/100

This shows that the 18 days that did rain take up 60% of the whole month.

So then the remaining 12 days that didn't have rain must take up 40% of the month.

Solution:
40% of the days did not have rain during the month of April
6 0
3 years ago
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