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Mandarinka [93]
3 years ago
11

7-2 Practice Questions

Mathematics
1 answer:
dusya [7]3 years ago
3 0

Answer:

24

Step-by-step explanation:

There are 36 possible outcomes when rolling 2 dice. The sums range from 2 to 12. There are 4 ways of rolling a 9: 3, 6; 4, 5; 5, 4; 6, 3.

p(sum of 9) = 4/36 = 1/9

1/9 of the rolls are expected to have a sum of 9.

1/9 * 216 = 24

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Colin’s piano lesson is 45 minutes, or Three-fourths of an hour, long. If he practices 6 different songs and spends an equal amo
NikAS [45]

Answer:

<em>Colin spends 1/8 of an hour practicing each song</em>

Step-by-step explanation:

Colin's piano lesson is 3/4 of an hour, long.

In that period, he practices 6 different songs, spending an equal amount of time on each one.

This means that each song gets the sixth part of the lesson duration. The fraction that expresses that amount is:

\displaystyle \frac{\frac{3}{4}}{6}=\frac{3}{24}=\frac{1}{8}

Colin spends 1/8 of an hour practicing each song

5 0
4 years ago
Read 2 more answers
Raj is 3 inches taller than Howared. Let h represent Howards height. write an algebraic expression to represent Raj's height.
Nitella [24]
Answer:
Let's say Raj's height is 60 inches
60-3 = H
H= Howard's height
60 = Raj's height
Or it could be with two variables
R-3 = H
R = Raj's height
4 0
3 years ago
)) What is 2.825 rounded to the nearest whole number?
Shalnov [3]

Answer:

2.83

Step-by-step explanation:

25 round off is equal to 30

so we can write 2.825 = 2.83 in form of 2 digits

83 round off to 80

2.83 is equal to 2.8

4 0
3 years ago
Sage and Tom started the month with the same number of talk minutes on their cell phones. Sage talked for 7 minutes with her dad
AlekseyPX

Answer:

Step-by-step explanation:

x=number of talk mnutes

Sage uses 7 minutes = x-7

Tom uses 4 and 3 minutes = x-4-3    = x-7

7 0
3 years ago
Read 2 more answers
The data were collected from a statistics class. The column head gives the​ variable, and each of the other rows represents a st
Basile [38]

Answer:

Gender is a categorical variable. The sum gives the total number of students in class.

Step-by-step explanation:

We are given the following in the question:

The variable​ Male, is​ categorical, even though its values are numbers.​

Categorical variable:

  • These variable are the non parametric variable.
  • They do not need values to express the data.
  • They only use number and numerical to express the data or represent the data.
  • There is no relation with true value of numerical.

Thus, gender is a categorical variable. Numbers are only used to represent the data.

Numbers are just a representation.

The sum of these represent the total male and female students in class. Thus, the sum gives the total number of students in class.

8 0
4 years ago
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