Answer:
x = 8
Step-by-step explanation:
2(78°) = 20x - 4
156 = 20x - 4
add 4 to each side of the equation:
160 = 20x
divide both sides by 20:
x = 8
The answers for this question would be:
<span>30
720
1,000</span>
Answer:
w/2 = 7.5/5
3kg
Step-by-step explanation:
Remaining question below:
Which proportion could Maddy use to model this situation?
a. w/2 = 7.5/5
b. w/7.5 = 5/2
Solve the proportion to determine the weight of a 2 liter jug.
_____kg
5 liters jug of sport drink weighs 7.5kg
2 liters jug of sport drink will weigh x kg
Find w
Ratio of weight to volume
7.5kg : 5liters=7.5/5
wkg : 2 liters=w/2
Equates the ratio
7.5 / 5 = w / 2
Cross product
7.5*2=5*w
15=5w
Divide both sides by 5
3=w
w=3kg
Therefore, weight of the 2liters jug of sport drink is 3kg
Answer:
Son's age = 20 years
Father's age = 60 years
Step-by-step explanation:
Let son's age be x
Fathers age = 3x
Ten years ago:
Sons age = x - 10
Fathers age = 3x - 10
3x -10 = 5 * (x-10)
3x - 10 = 5x - 50
50 -10 = 5x - 3x
40 = 2x
x = 40/2
x =20
Son's age = 20 years
Father's age = 60 years
