ashleyivers3
15.09.2021 •
Mathematics
Is the substitution below done correctly if the solution to the equation is x=-1?
5x+9=2(3+x)
5(-1)+9=2(3+(-1))
-5+9=2(2)
4=4
LHS=RHS
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Ответ:
>127ft
Step-by-step explanation:
The ladder must be more than 127ft to reach the top of the 112 foot wall. If the ladder was placed directly against the wall (not 15ft away from the base), the ladder would have to be 112ft to start with, since it would not reach otherwise. Now, since the ladder is 15ft away from the base, add the 15ft to the 112ft. Thus, the ladder must be at least 127ft tall to reach the extra 15ft.