Question 23109
Let x = base
x+3 = height


Area = 1/2*b*h= 35
{{{(1/2)*x*(x+3) = 35}}}


Multiply both sides by 2:
{{{x(x+3)= 70}}}
{{{x^2 +3x - 70=0}}}
{{{(x+10)(x-7)=0}}}


First solution:
x=-10 reject this solution!


Second solution:
x= 7 feet = base
x+3= 10 feet = height


Check:  Area = 1/2*b*h = 1/2*7*10= 35 square feet


R^2 at SCC