Step-by-step explanation:
i)
2(x+2)=7
2x+4=7
2x=7-4
2x=3
x=3/2
ii)3x + y =8 , y=x
3x + x = 8
4x = 8
x = 2
C. Because complementary angles are two angles whose sum equals 90 degrees so do 90-40=50 then 50x2= 100
Answer:

Step-by-step explanation:
-3.5 means -(3 +
)
In other words, -3.5 = 
When we draw two numbers
and
on a number line,
comes first from left to right.
We know that all the numbers on a number line from left to right are in increasing order.
Therefore,
is smaller than
.

Lauren is not correct.