If you get this right i will mark u as brilliants

B

Step-by-step explanation:

Remove unnecessary parenthesis

9.4x-3y-(4.5x-8y)

When there is a "-" in front of an expression in parentheses, change the sign of each term of the expression

9.4x-3y-4.5x+8y

Collect like terms

(9.4x-4.5x)-3y+8y

4.9x+5y

the answer is 96 degrees

step-by-step explanation:

you have to realize that a line equals 180 degrees

problem:

f(x) = - 2/3x + 5; f(5/2)

substitute 5/2 in for x:

f(5/2) = -2/3(5/2) + 5

simplify the right side:

f(5/2) = -5/3 + 5

f(5/2) = 10/3

f(5/2) = 10/3

i hope this !