Answer:
d) 
Step-by-step explanation:
b) 
This expression is not equivalent, as the original expression,
, has 9 multiplied to
instead of y. You can interchange values like this when it comes to addition, but not multiplication.
c) 
This expression is also not equivalent. After opening up the parentheses, it would again result in y being multiplied to
.

d) 
This expression is equivalent, as 9 and
are still being multiplied together and y is added to the product. We can actually rearrange this to look like the original expression:

I hope this helps!
Answer:
2 points
Step-by-step explanation:
10-14=-4
-4+6=2 or
10+6=16
16-14=2
Answer:
Hello :)
Step-by-step explanation:
1. a
2. None
3. c
4. b
Hope this helps :)
Answer:
150
Step-by-step explanation:
We can write a proportion to find the total amount in the choir using the information given. A proportion is two equivalent ratios set equal to each other.

We will cross multiply the numerator of one ratio with denominator of the other. And then solve for y.
24y=100(36)
24y=3600
y=150.
There are 150 students in the choir.
Answer:
3=3 infinity many solutions
Step-by-step explanation:
12x+1=3(4x+1)-1
3x4x 3x1
12x+1=12x+3-2
+2 +2
12x+3=12x+3
-12x -12x
3=3