Answer:
first and second one, and fourth one
Step-by-step explanation:
Answer:
Daniiel is 33 years old.
The son is 7 years old.
Step-by-step explanation:
x+26=3x
The x represents the son.
To solve for x:
-26=x-3x
-26=-2x
x=13
Since the father will be 3 times his son's age in six years we subtract 6.
x=7
This means the son is 7 years old as of right now. To find the father's age you do 7+26=33
Answer:D= 60miles
Step-by-step explanation:
Speed=distance/time
Distance = speed× time
D=(45-30)× 4
D= 15×4
D= 60miles
Answer:
146
Step-by-step explanation:
Since John works for 9 hours and makes 14 an hour. You multiply 14 by 9 which equals 126. You add 20 from the tips to 126. This makes 146.
Answer:
28π
Step-by-step explanation:
The formula for calculating surface area of cylinder is 2πrh+2πr^2 (r: radius, h : height)
Since the base for the given cylinder is 2 and height is 5 the surface area would be
2π×2×5 + 2π×2^2 = 28π
