Answer:
Ivy is 6 years old and Rose is 12 years old.
Step-by-step explanation:
To solve this problem, two variables are necessary since we have two unknown variables: Ivy's age and Rose's age.
Ivy's age will be 
and Rose's age will be 
"Ivy is half as old as her sister":

this will be our <u>fist equation.</u>
"In six years, Ivy will be two-thirds as old as Rose"
in six years Ivy will have
years, and Rose will have
years, so for this sentence we have the equation:

this will be our <u>second equation.</u>
Substituting the value of x from the first equation into the second, and solving for y(Rose):

Rose is 12 years old.
and Ivy (using the fist equation):

Ivy is 6 years old.
Answer:
P(
)
Step-by-step explanation:
There are 6 sides on a die, with 3 even numbers
Create a fraction: 
The fraction would be
, simplified to
.
Answer:
108.4
Step-by-step explanation:
To find how many minutes of talk time is available per dolla, you have to divide 160 (number of minutes) by 40 (cost)
160/40 = 4
Therefore, it's 4 minutes per dollar
Answer:
1. The probability that the T-shirt will be grey :-
=》

=》

=》

hence, the probability of grey t-shirt is 0.1
2. The probability that the T-shirt will not be red :-
=》

=》

=》

=》

The probability that the T-shirt will not be red is
0.8
3. He takes one of his blue T-shirts at random.
What is the probability that the T-shirt is light blue
total blue t-shirts = 5
so, the probability of choosing light blue t-shirt is
=》

=》

=》

hence, the probability of choosing light blue t-shirt is 0.2