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Mathematics

2 answers:

pishuonlain [190]3 years ago

7 0

Answer:

15 out of 25, 60%, and 15/25

pashok25 [27]3 years ago

3 0

15/25 3/5, 60%, because 15 blue, 5 red, 5 green, you have 15 blue out of the total amount of marbles, so it is 15/25 or 3/5.

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Find the value of x<br> PIC IS BELOW

maks197457 [2]

: $\implies$ $\sf 3x = 27⁰$

: $\implies$ $\sf x = \dfrac{27}{3}$

: $\implies$ $\sf x = 9$

c.) x = 9⁰, angle measure is 27⁰

5 0

3 years ago

A group of 20 students attempting a mathematical challenge have an average age of 11.When their teacher is included their averag

miss Akunina [59]

Answer:

Teacher's age is 32.

Step-by-step explanation:

How you count the average age for people is:
(age of person 1 + age of person 2 ... ) / number of people = average age

Let's start by observing that we've got 2 equations coming from the text:

average of just students
20 students x 11 (average for a student) = sum of age of students
20 x 11 = 220
average of student and teacher
let's say x is age of teacher
together students & teacher is 20 + 1 = 21 people
(20 students x 11 + x)/ (20 + 1) = 12
(220 + x) / 21 = 12
220 + x = 12 * 21
x = 12 *21 - 220
x = 252 - 220
x = 32

hope this helps ❣️

7 0

1 year ago

Two squares have areas of 4 cm?

timofeeve [1]

Answer:

1/2

Step-by-step explanation:

First square area = 4cm^2, thus the side length is 2cm

Second square area = 16cm^2, thus the side length is 4cm

This gives a ratio of 2/4, simplifying yields 1/2

3 0