So making a simple equation helps to get all the information together
20 - 3.5X = 0.4
20 is the original. Minus the amount you paid for. equals the cash you got back
subtract 20 over
-3.5X=-19.6
Then divide both sides by -3.5
X=5.6
He bought 5.6 pounds
The volume would be in cubic meters.
V = (4/3) pi r^3 = 4/3 * pi * 2^3 = 32pi /3 m^3 or 33.51 m^3 to nearest hundredth
Number of child tickets: x
Number of adult tickets: y
1) x+y=370
2) 3x+7y=1750
Using the method of substitution
a) Isolating y in the first equation:
1) x+y=370→x+y-x=370-x→y=370-x
b) Replacing y=370-x in the second equation:
2) 3x+7y=1750→3x+7(370-x)=1750
c) Solving for x: Distributive property:
3x+7(370)-7x=1750
3x+2590-7x=1750
Adding similar terms:
-4x+2590=1750
-4x+2590-2590=1750-2590
-4x=-840
Dividing both sides of the equation by -4:
-4x/(-4)=-840/(-4)
x=210
Replacing x=210 in the first equation:
1) y=370-x→y=370-210→y=160
Answer:
The number of child tickets was 210 and
the number of adult tickets was 160
Answer:
15 cm²
Step-by-step explanation:
3(5)=15 cm²
