Answer: 10/3
Step-by-step explanation:
Look at attachment
Answer:
if you want a t*-value for a 90% confidence interval when you have 9 degrees of freedom, go to the bottom of the table, find the column for 90%, and intersect it with the row for df = 9. This gives you a t*–value of 1.833 (rounded).
Step-by-step explanation:
Hope this helps!
When they talk about congruent polygons, they meant geometric figures that are all equal in shape and size.
It's angled, and the side length is equal too.
When you piled equal polygons, you'll end up with what we call prisms. It's the 3D form of a polygon.
If you stack squares, you'll have a cube.
If you stack octagons, you'll have an octagon prism.
Let the base of the ladder be x ft and the extension be y ft.
"when fully extended, a ladder is 28 feet in length."
means: x+y=28
"<span>the extension is 4 feet shorter than the base</span>"
means: y=x-4, that is x-y = 4, (taking y to the side of x, and -4 to the other side of x and y)
thus, we have the system of equations:
1) x+y= 28
2) x-y=4
adding the 2 equations, we have:
(x+y)+(x-y)=28+4
2x=32
x=32/2=16
x+y=28, so 16+y=28, thus y=12
Answer: Base: 16, Extension 12
