chychy2003
22.03.2020 •
Mathematics
Andrei but 3 notebook for d dollar each and calculator for 7 dollar a store coupon gives him $2 off his entrie purchase the expression (3d +7)-2 represents this situation. Write an equivalent expression in simpler form
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Ответ:
legng times width=8 times 5
area=40
so if 40=100%
and it increased by 20% then
40=100%
x=120%
we notice that 1/5 of 100=20 so
1/5 of 40=20%
20%+100%=120%
1/5 of 40=8
40+8=48
new area=48 squre inches