Theres an app called slader. If you look up what your school book is it will give you all the answers
True,
4a - 3b
4(6) - 3(1)
24 - 3 = 21
1/2 pint of oil=2 1/2 gallons of gas
X pint of oil= 10 gallons of gas
X= (10*0.5)/2.5
X= 2 pints of oil
A= 72.5 (you take 145 and divide by 2 b/c one inside is smaller)
B= 72.5 also b/c the share a corresponding line