Answer:

Step-by-step explanation:
Greatest multiplier of 4 that is less than 21 is 5 (4 x 5 = 20)
Put the remaining number as the numerator (21 - 20 = 1)
The scenario described above is like dividing a right cone from the vertex down to the center for the base. The polygon that can be formed from the division or in this case slicing is a triangle. Thus, the answer to this item is letter B.
Answer:
y = 10x + 7
Step-by-step explanation:
Because the ratio of a 45,45,90 triangle is 1:1: square root 2, x=4.
:)