Step-by-step explanation:

Answer:
30
Step-by-step explanation:
A=(a+b)/2xh
A=(6+9)/2x4
A=15/2x4
A=7.5x4
A=30
<h3>The Graph you need above </h3>
<h3>Step-by-step explaination : </h3>
<h3>Combine 1/3and x.</h3>
y<x/3+1/2
<h3>Use the slope-intercept form to find the slope and y-intercept.</h3><h3 />
Slope: 1/3
y-intercept: 1/2
<h3>Graph a dashed line, then shade the area below the boundary line since y is less</h3><h3>than x/3+1/2.</h3>
<h3>y<x/3+1/2</h3>
A quadrilateral with only 2 right angles could be a trapezoid so Balavan is wrong. Denna is right because if 3 angles are right angles the the fourth angle must also be a right angle and has to be a square or rectangle.