7.
remember
(ab)/(cd)=(a/c)(b/d)
we can split them up
and
(x^m)/(x^n)=x^(m-n)

=

9.
2 to 3
4(x-1)=15
to
4x-1=15
the distribuutive prperty
a(b-c)=ab-ac
what he did was
a(b-c)=ab-c
he did not distribute the 4 to the -1
4(x-1)+3=18
minus 3
4(x-1)=15
distribute 4 to x and -1
4x-4=15
add 4 to both sides
4x=19
divide by 4
x=19/4
Answer: -4
Step-by-step explanation:
-8x+4=36
-8x=36-4
-8x=32
-8x/-8=32/-8
x= -4
12x^2-4x-5=0
12x^2+6x-10x-5=0
6x(2x+1)-5(2x+1)=0
(6x-5)(2x+1)
6x-5=0 , 2x+1=0
6x=5 , 2x=-1
x=5/6 , x=-1/2
Answer:
The answer would be B
2.5x = 45
(x) would be the number of dolls, multiplied by how much each doll costs ($2.50) and the product would be how much she has to spend. Hope this helps!