Questions:
(a) What is a simplified expression for (x + y) – (x – y)?
(b) Carlotta thinks that 
is the same as 
. Which statement shows that it is NOT the same?
Answer:
Step-by-step explanation:
Solving (a):
Given
Required
Simplify
Open brackets
Collect Like Terms
Solving (b):
Given
and
Required
Which expression shows they are not the same
The expression that shows this is:
Take for instance; y=2
Substitute 2 for y in
Evaluate all exponents
The above expression supports
Answer:
2.
30-7x4 = 2
3.
80
Step-by-step explanation:
2.
First, do 7x4, which equals 28. Then subtract that from 30, and you get 2.
3.
Do the parentheses first, 21-6=15. Then 15 divided by 0.2 = 75. 75+5=80.
Sorry I couldn't help on any of the other ones, I don't have much time.
Answer:
C.
<em><u>hope this helps :)</u></em>
Answer:
There is an infinite number of solutions.
Step-by-step explanation:
When you simplify the left side of the equation, you get -7n - 14, which is equal to the right side. If you were to plug in any number for n, it will equal the same on both sides of the equation.
