She will solve 20 problems in 2.5 hours, 4*5 thirty minute sessions=20.
Answer:
2
Step-by-step explanation:
I dont know for sure though...
Answer:
False.
Step-by-step explanation:
The number 5 IS a coefficient because it is the first number in the expression.
A) x-6; you have x amount of money and pay 6 dollars for a hat.
b) 2(x2);
Answer:
Substitution property of equality
Step-by-step explanation:
Given
and 
Then

Required
State the property
From the list of options, (d) answers the question.
This is so because:
Substitution property of equality states that
If
then 
In other words, both can replace one another.
So if
, then 2y + 1 can be substituted for x in
So:
becomes

<em>Hence, it is substitution property of equality</em>