Answer:
she delivers 9 flower plugs.
Step-by-step explanation:
in a standard equation the equation would be 21 = 2x + 3 and if you isolate the x you would have to first subtract the 3 from both sides and that would leave you with 18 = 2x and then you have to divide both sides by 2 and get 9=x
<em><u>The pair of like terms are:</u></em>

<em><u>Solution:</u></em>
<em><u>Given expression is:</u></em>

We have to find the pairs that are like terms in the given expression
Like terms means that, terms that have same varibale but different ( or same ) coefficients
Here in the given expression "x" and "y" are the two variables present
Arrange the like terms

So here the first two terms has same varibale "y" but different coefficients. So they form a pair of like terms
"x" is present only once . There is no other term with variable "x"
6 and -2 are constants
So the pair of like terms are: 
Answer:
i think the answer is B hope i was helpful
Step-by-step explanation:
Answer:
a. the mean differences among the levels of one factor
Step-by-step explanation:
In statistics, a two-way analysis of variance (ANOVA), a main effect is defined as the mean differences among the levels of one factor.
The aim of a two-way analysis of variance (ANOVA) is to give the relationship or identify if there is an interaction between the two independent variables on the dependent variable.