Answer:
Ethan's cylinder has a larger total surface area
Step-by-step explanation:
we know that
The surface area of a cylinder is equal to
step 1
Find the surface area of Tommy's cylinder
we have
----> the radius is half the diameter
substitute in the formula
step 2
Find the surface area of Ethan's cylinder
we have
----> the radius is half the diameter
substitute in the formula
Compare
therefore
Ethan's cylinder has a larger total surface area
Casey is 18 years old and Ralph is 3 years old.
Step-by-step explanation:
Let,
Age of Casey = x
Age of Ralph = y
According to given statement;
x = 6y Eqn 1
In two years
x+2=4(y+2)
x+2=4y+8
x = 4y+8-2
x = 4y+6 Eqn 2
Putting value of x from Eqn 1 in Eqn 2
Dividing both sides by 2
Putting y=3 in Eqn 1
Casey is 18 years old and Ralph is 3 years old.
Keywords: word problems, substitution method
Learn more about substitution method at:
#LearnwithBrainly
Answer:
Width is 5 and length is 7
Step-by-step explanation:
You can solve the equation using the distributive property and inverse operations.
2x +2(x+2)=24
2x + 2x + 4 = 24
4x + 4 = 24
4x = 20
X = 5
This means the width is 5 and the length is 7.
Answer:
$143.2
Step-by-step explanation:
20% of 179 is 35.8
so 179-35.8 = 143.2
Answer:
x = -7
Step-by-step explanation:
4x-9 = 7x+12
Add 9 to both sides
4x = 7x + 21
Subtract 7x from both sides to further isolate the variable
-3x = 21
Divide both sides by -3
x = -7
Plug the value in to check your work:
4(-7) - 9 ? 7(-7) +12
-28 - 9 ? -49 + 12
-37 ? -37
-37 = -37