Answer:
29
Step-by-step explanation:
first sub in 3 wherever x is shown
(3)^2+8(3)-4 the use bedmas (brackets,exponents,division,multiplication,addition,subtraction)
solve brakets first
(3)^2=9
8(3)=24
rewrite equation ; 9+24-4=29
105:175
3+5 = 8
3/8 of 280 is 105.
5/8 of 280 is 175.
the ratio is 105:175
next we have to simplify it:
divide both sides by 5:
21:35 divide both sides by 7=
3:5
