I would say acute If I am wrong sorry

in simplest form would be

because you could divideboth numerator and denominator by 2. Hope it helps!!
7. She is not correct. The simplification of this expression is 22a-32.
8. She is correct. The simplification of this expression is 4a-10.
The last one is tricky because I honestly do not know how to do it but you can google It.
I hope that it helped some though
Answer:
the answer is 21
Step-by-step explanation:
Answer:
The value of given expression is 22.5.
Step-by-step explanation:
The given expression is

Where, c=6 and d=7.
Substitute c=6 and d=7 in the given expression.





Therefore the value of given expression is 22.5.