Answer:70
Step-by-step explanation:
Given
total of 7 friends need to be divided in two groups with 3 member each and 1 leader
leader can be chosen out of 7 person in
ways
And 3 person out of remaining 6 persons in
ways
thus a total of
ways is possible
If order is not matter then
ways are possible
Well
x/6=3/*6
x=18
There are 18 pages in Ramals stamp album
FOIL: first term, outer term inner term, last term
The slopes of perpendicular lines are negative reciprocal to each other
ex. the negative reciprocal to 5/2 is -2/5
once you find the perpendicular slope, you plug in the point and slope into the point-slope form of a line and then rearrange it into the slope-intercept form to get your answer
point slope

slope intercept form