Find the area of each triangle to the nearest tenth.

9. 60.5 cm 10. 30 mi

Step-by-step explanation:

The equation for the area of a triangle is:

Base×Height÷2

9.

1. plug in the numbers with Base×Height÷2: 11×11÷2

2. solve: 11×11=121

3. 121 ÷ 2 = 60.5

60.5 cm

10.

1. plug in the numbers with Base×Height÷2: 5×12÷2

2. solve: 5×12= 60

3. 60÷2=30

30 mi

Let
x---------------> first  positive odd integer
x+2------------> second  positive consecutive odd integer

we know that
(x+2)²=2x²-1---------> x²+4x+4=2x²-1-------> x²-4x-5
x²-4x-5=0
using a graph tool--------> to calculate the quadratic equation
see the attached figure

the solution is
x=5

the answer is
the first  positive odd integer x is 5
the second  positive consecutive odd integer x+2 is 7