80x20=1600 costumes
12x90=1080 masks
1600-1080=520
they ordered 520 more costumes than masks. hope this helps!
Well in my answer i got 5.06 i rounded to the nearest hundred instead of putting all of the numbers behind the 6.
Answer:
d = 3(h - 2)
Step-by-step explanation:
h = d/3 + 2
taking 2 to the right hand side
h - 2 = d/3
multiplying both sides by 3
3(h - 2) = d
therefore
d = 3(h - 2)
You can try on photo math it works for me its free on app store
Answer:
g = 12
Step-by-step explanation:
g + 7 - 4 = 15
Combine like terms
g +3 = 15
Subtract 3 from each side to isolate g
g+3-3 = 15-3
g = 12