1. I don't what it means by models sorry.
2.
a) gcf of 4d and 12e is 4
4(d+3)
b) gcf of 18x and 30y is 6
6(3x+5y)
c) gcf of 21a and 28y is 7
7(3a+4y)
d) gcf of 24f and 56g is 8
8(3f+7g)
Hope this helps :)
Answer:

Step-by-step explanation:
The vertex form of a quadratic equation <em>y = ax² + bx + c :</em>
y = a(x - h)² + k
(h, k) - vertex
We have the equation

Convert to the vertex form:


<em>use (a + b)² = a² - 2ab + b²</em>

Answer:
3 times x could get you that
Step-by-step explanation:
Answer:
y<-10
Explanation:
20<-2y
Divide both sides by -2
20
-___ >y
2
Simplify 20/2 to 10
-10>y
Switch sides
y<-10
Answer It is the first option because it has reflectional symmetry vertically and horizontally, therefore creating 4 lines of symmetry. If that's wrong, then it's "c."
Step-by-step explanation:
because it has reflectional symmetry vertically and horizontally, therefore creating 4 lines of symmetry. If that's wrong, then it's "c."