Which expressions are equivalent to 25x^4–64? select three options.
a. 25x^4+40x–40x–64
b. 25x^4+13x–13x–64
c. (5x^2+8)(5x^2–8)
d. (x^2+13)(x^2–13)
e. (5x^2–8)^2

Solve the system. -a+4b+2c=-8 3a+b-4c=9 b=-1 a.(0,11) ,-1,2) c.(1,1,-2) d.(2,-1,-1)

Ageologist had two rocks on a scale that weighed 4.6 kilograms together. rock a was 0.5 of the total weight. how much did rock a weigh?

Suppose your school costs for this term were $4900 and financial aid covered 3/4 of that amount. how much did financial aid cover? and how much do you still have to pay?