Help me please and thanks

Mathematics

1 answer:

vazorg [7]4 years ago

8 0

Answer:

$414\pi$

Step-by-step explanation:

The formula for the surface area of a cylinder is $2\pi r h + 2\pi r^2 =2\cdot \pi \cdot 9 \cdot 14 + 2\cdot \pi \cdot 9^2=252\pi + 162\pi=414\pi$ square inches. Hope this helps!

You might be interested in

If Tina traveled 2,000 miles in 5 hours on her plane flight to her vacation destination, how fast was the plane traveling?

IRINA_888 [86]

Answer:

400 miles per hour

Step-by-step explanation:

2.000 miles : 5 hours =400 miles per hour

have a nice day :)

6 0

3 years ago

What is the surface area of the cylinder? Express the answer in terms of pi

Sholpan [36]

Bonjour,

answer ≈ 522.92

working
A= 2πrh+2πr^2
=2 x π x 4 x 18+2 x π x 4^2
≈552.92031

4 0

3 years ago

Using a sheet of graph paper, solve the following system of equations graphically. Be sure to show any work, use a straight edge

madam [21]

Answer:

Step-by-step explanation:

Given system is

$\left \{ {{x+y=0} \atop {x-y+2=0}} \right.$

If we graph, the solution would be the interception point between these two lines, because each linear equation represents a line. The lines are attached.

In the graph, you can observe that the solution is the point (-1,1), that is x = -1 and y = 1.

Now, if we want to solve this system by another method, we can just sum both equations and solve for <em>x</em>

$\left \{ {{x+y=0} \atop {x-y+2=0}} \right.$

$2x+2=0\\x=\frac{-2}{2}=-1$