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2 years ago

Alvin is 13 years younger than Elga. The sum of their ages is 27. What is Elga's age?

Mathematics

2 answers:

Elena L [17]2 years ago

8 0

Step-by-step explanation:

Let A be Alvin's age and E be Elga's age

A + E = 27

also A + 13 = E

Substitute for A in the first equation

E -13 + E = 27

2E = 40

E = 20, so Elga is 20 years old and Alvin is 7.

omeli [17]2 years ago

5 0

Answer:

Step-by-step explanation:

27-13

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Lelu [443]

Answer:

1 and 3, 2 and 4.

Step-by-step explanation:

1. -1.66666666667

2. 1

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3 years ago

The drama club is selling tickets to their play to raise money for the show's expenses. Each student ticket sells for $5 and eac

Westkost [7]

80 student tickets and 30 adult tickets must be sold to reach a $700 raise.

Since the drama club is selling tickets to their play to raise money for the show's expenses, and each student ticket sells for $ 5 and each adult ticket sells for $ 10, and the auditorium can hold a maximum of 110 people and the drama club must make a minimum of $ 700 from ticket sales to cover the show's costs, to determine one possible solution the following calculation must be performed:

110 x 5 + 0 x 10 = 550
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2 years ago

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3 years ago

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school guidelines require that there must be at least 2 chaperones for every 25 students going on a school trip how many chapero

elena-s [515]

5 chaperones are needed for the trip

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3 years ago

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I have many students are represented in the data set?

nalin [4]

Answer:

a) 19 students

b) the mean 3 9/19

the median 3

the mode 3

c) the range 6

Step-by-step explanation:

The data set shows that

0 points gets 1 student,

1 point gets 1 student,

2 points get 2 students,

3 points get 6 students,

4 points get 4 students,

5 points get 3 students and

6 points get 2 students.

a) There are 1+1+2+6+4+3+2=19 students.

b) The mean is

$\dfrac{1\cdot 0+1\cdot 1+2\cdot 2+6\cdot 3+4\cdot 4+3\cdot 5+2\cdot 6}{19}=\dfrac{66}{19}=3\dfrac{9}{19}.$

The average score is 3 9/19 points.

The median is 10th term in the data set - 3 points (means the middle score in the data set)

The mode is 3 points (means most happened score)

c) The range of the data is 6-0=6 points.

7 0

3 years ago