<span>The probability that a selected male student is blond = 25/60 = 5/12 = 0.42</span>
30t + 20c =< 300
5t + 10c =< 110
10c =< 110-5t
30t + 220-10t =< 300
20t =< 80
t = 4
120c + 20c =< 300
20c = 180
c = 9
Answer:
6 + 7 = 13
Step-by-step explanation:
We are given the following information in the question:
We know that

We need this information to evaluate

The evaluation can be done with the help of using associative property and distributive property.
Associative property: (a + b) + c = a + (b + c)
The evaluation can be shown as:

Segment addition postulate
Substitution
Distribution Property of Equality
Simplification, or Adding like terms
Subtraction property
Division Property
Their average speed was 52 miles per hour