luispedraza luispedraza

18-11-2020
Mathematics

contestada

The mean age of 15 students in a class is 6 years. If the age of
their teacher is included, mean becomes 9 years. Which is the age of
the teacher?

Respuesta :

coradwhite823 coradwhite823

18-11-2020

Answer:

might be wrong but 54

Step-by-step explanation:

15 × 6 = 90

90 + 54 = 144

144 ÷ 16 = 9

hope this helps

Answer Link

Otras preguntas

write the following ratio in simplest form : 32 min : 36 min A. 8 : 9 B. 8 : 36 C. 32 : 9 D. 128 : 144

what is a rational number between 1/8 and 1/4?

4a + 3 - 9 = -7 + 2 + a

Choose the equation below that represents the line passing through the point (2, -4) with a slope of 1/2. A) y = 1/2 x + 5 B) y = 1/2 x - 3 C) y = 1/2 x - 5 D)

Choose the equation below that represents the line passing through the point (2, -4) with a slope of 1/2. A) y = 1/2 x + 5 B) y = 1/2 x - 3 C) y = 1/2 x - 5 D)

Choose the equation below that represents the line passing through the point (2, -4) with a slope of 1/2. A) y = 1/2 x + 5 B) y = 1/2 x - 3 C) y = 1/2 x - 5 D)

who made dutch claims in north america?

who made dutch claims in north america?

what can turn igneous rock into sediment?

4a + 3 - 9 = -7 + 2 + a