Answer:
10 cm
Step-by-step explanation:
If we assume that DC is parallel to AB, then triangle DOC is similar to triangle AOB.
However, even with this assumption, there is not enough information in the diagram to solve for DO. We would also need to know the length of CO. Then we could write a proportion:
DO / (DO + 20) = CO / (CO + 24)
Edit: OD is 2 cm shorter than OC. If we call x the length of OD, then the length of OC is x+2.
Putting this into our proportion:
x / (x + 20) = (x + 2) / (x + 2 + 24)
x / (x + 20) = (x + 2) / (x + 26)
Cross multiply:
x (x + 26) = (x + 2) (x + 20)
Distribute:
x² + 26x = x² + 20x + 2x + 40
x² + 26x = x² + 22x + 40
4x = 40
x = 10
So the length of DO is 10 cm.
If you plot 3,12 on a graph and go move to the
left one and up one untill the x axis is zero you
will land on five. so the amount the tub started
with is 15
You multiply the smaller film (35mm) and since the screen is being made bigger "dilated" you multiply 35 by the 350 and get 12,250 (c)
Answer:
Step-by-step explanation:
Derive the equation of the parabola with a focus at (6, 2) and a directrix of y = 1. A f(x) = −1/2 (x − 6)2 + 3/2. B f(x) = 1/2 (x − 6)2 + 3/2. C f(x) = −1/2 (x + 3/2)2 + 6.
