If a line's slope is

, the slope of the perpendicular line is

in this case, the given line has a slope 4, which is 4/1, so the perpendicular line has a slope/gradient
Answer:
5,000,000
Step-by-step explanation:
B. 11
Although eleven is a prime number, it's two factors (1 and 11) are odd integers
For Question 1:
angle CAB, angle ABC, angle BCA
Question 2: angle BCD
Step-by-step explanation:
40 = 2 * 2 * 2 * 5
28 = 2* 2 * 7
So now
The GCF = 2 * 2 = 4