Question

Please help me! thanks

Answer 1

1) 16

2) 20

3) -12

4) 16

Explanation:

1) Substitute the r for 4 like it tells you in the question so 12 + 4 = 16.

2) Substitute d with -3 so 5(-3+7) = 5 x (4) = 20

3) Substitute m for 4 so -48 / 4 = -12

4) Angle of triangle is half base times height or 1/2 x b x h

And since the base is 4 and the height is 8:

1/2 x 4 x 8 = 1/2 x 32 = 16

Or in other words:

1/2 x 32 = 32 / 2 = 16