92................................................................................................
Let
x: age of the teacher.
y: age of the oldest student.
z: youngest student's age
We can solve the problem with the following system of equations:
y = 2z
x = 5y
x + 5 = 5z
Solving for x:
z = y / 2
y = x / 5
Thus
z = (x / 5) / 2
z = x / 10
Then,
x + 5 = 5 (x / 10)
x + 5 = x / 2
(1/2) x = -5
x = -10
y = -2
z = -1
answer
the teacher's present age is -10
Note: the problem does not make much physical sense (but mathematically it has no problem)
Answer:
11/25
Step-by-step explanation:
# means number
probability = # of orange marbles / # of total possible outcomes
7(red) + 3(green) + 4(blue) + 11(orange) = total possible outcomes
total possible outcomes = 25
# of orange marbles = 11
11/25; the probabilty of randomling picking an orange marble is 11/25
A=k/b, where k is a non zero constant.
When a=0.5, b=3.25, is
0.5=k/3.25
k=3.25×0.5=1.625
meaning that when there is a value for b, dividing 1.625 by it will form the value of a.
therefore, when b=2, 1.625/2=0.8125, which is 13/16.
answer is 13/16
Answer:
Numbers are 8 and 10
Step-by-step explanation:
10 + 8 = 18