. 19 + {(9-4 + (6-21) = (USE BODMAS)

Step-by-step explanation:

19 + {(9-4) + (6-21)} = 19 + {5 + (-15)}

                               = 19 + {5 - 15}

                              = 19 - 10

                              = 9

If this is the equation: 19 + [(9-4) + (6-21], then the answer is 9

Step-by-step explanation:

First step is to deal with the smaller (inner) brackets

9 - 4 = 5

6 - 21 = -15

Then the equation would be 19 + [5 + (-15)]

Next, deal with the larger bracket

5 + (-15) = - 10

The equation would then be 19 + (-10)

Then solve that which gives you 9

-3

step-by-step explanation:

a drawing really does here:

so i draw the horizontal line y=2 and the vertical line x=-2 at this intersection i put b (this is where my right angle is going to be).   so point b is at (-2,2).   point a is 5 units long and is also on y=2 so this point has to be (3,2) or (-7,2) -doesn't matter i will go with (3,2).

now we know c is at (-2,y) we don't know the y yet bet we know that c is on x=-2.

we have the area of the triangle is .5bh=12.5

we know the base length is 5 (ab)

we have the height is (2-y) if you look at your

plug in

.5(5)(2-y)=12.5

solve for y to get the y-coordinate for c

2.5(2-y)=12.5

divide both sides by 2.5 giving:

2-y=5

now subtract 2 on both sides

-y=3

y=-3