Answer:
a (5+3)*20
Step-by-step explanation:
she bought 5 dresses and 3 shoes for 20 dollars each type
so add 5 and 3 then multiply by 20 and you will get the same answer of 80 dollars
Answer:

Step-by-step explanation:
x2 − 9x + 20

Answer:
A random variable is a variable whose values are unknown. Random variable are mostly used in regression analysis to determine the statistical relationship between two entities.
Step-by-step explanation:
There are two types of random variable;
1. The discrete random variable and
2. The continuous random variable.