Answer:
Part a)
Part b) Added only one side triangular face instead of three side triangular faces
Step-by-step explanation:
we know that
The surface area of a triangular prism is equal to two times the area of the base plus the area of its three triangular faces
so
Riley's error was
added only one side triangular face instead of three side triangular faces
Answer:
1 box contains x and 2 boxes contain negative signs.
Step-by-step explanation:
Representing x minus 2 using algebra tiles ;
x is positive ; Coefficient of x
2 is negative
Hence,
One box will will contain x (since the Coefficient of x is one)
The other value is a constant, hence the value if its Coefficient ; this means we'll have 2 boxes of negative sign.
15 machines * 15 minutes = 500
75 machines * x = 6000
by dividing both equations we have
(75*x)/(15*15) = 6000/500
solving for x
x = 36
it would take 36 min
Answer:
b. 9 units
Step-by-step explanation:
30/2 -6 = 15-6 = 9
Answer:
A) x²/25 + y²/9 = 1
Step-by-step explanation:
The major axis length is the sum of distances to the foci from the ellipse, 10. So the semi-major axis has length 10/2 = 5. The foci are on the x-axis, so the ellipse is oriented horizontally.
The semi-minor axis is the other leg of the right triangle having the focus and center as one leg, and the semi-major axis as the hypotenuse. This is obviously a 3-4-5 triangle, so the semi-minor axis length is 3.
When the ellipse is horizontal, the formula for it is ...
... (x/(semi-major axis))² + (y/(semi-minor axis))² = 1
... (x/5)² + (y/3)² = 1
... x²/25 + y²/9 = 1