Formula for finding the area of a parallelogram: a equals bh
A equals two b × two h
A equals four bh
The area of a parallelogram would be quadrupled if the height and weight of it were doubled
(I had to write out certain words because my keyboard is not fully working)
40 - 4 = 36
average = 36/9 = 4
answer
average number of members who joined the math club is 4 per month
10(2x+3) - 20
multiply 10 by 2x and by 3 to get
20x+30-20
subtract 20 to get
20x+10
