If x = 10 find the value of 2x2 + 21

221

Step-by-step explanation:

If x = 10,

2x² + 21 = 2(10)² + 21

             = 200 + 21

             = 221

Hope it helps :)

Please mark my answer as the brainliest

61 or 2123

Step-by-step explanation:

10x2=20

10x2=20

20+20=40

21+40=61

2101+21=2123

answer:   14

step-by-step explanation:          

pu you stank bo u ugly bo lol

-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