Please help it’s multiple choice! ( show ur work please )

I think its 12

Step-by-step explanation:

because these half angels are equal to 30,90, and 60

if you are looking for AD then we have half of 10 which is 5

So then we had 5+13=18

If we add 18+12 it will equal to 30

and if we add them all up 13+10+12+13=48

and acute angle-an angle can equal to anything below 90

I think this is correct

so firstly, we need to isolate the y variables to be able to solve these inequalities. firstly, add 0.5x on both sides of the first inequality and subtract 1.5x on both sides of the second inequality:

now since the slope is positive for the first inequality, this means that the line going upwards belongs to the first inequality, and the line going downwards belongs to the second inequality.

next, since y ≥ in the first inequality, this means that the shaded region will be above the first inequality's line, thus shading regions a and b.

next, since y ≤ in the second inequality, this means that the shaded region is going to be below this line, thus shading regions a and c.

since both lines shade region a, this means that region a is the solution.

step-by-step explanation:

mark brainliest!