Please help me! A, b,c, or d?

B

Step-by-step explanation:

total surface area=2 triangles with base 6 and height 4 m +2 rectangles with length 12 m and width 5 m +one rectangle with dimensions 12 m×6 m

=2×1/2 ×6×4+2×12×5+12×6

=24+120+72

=216 m²

C. 216

Step-by-step explanation:

Surface Area is the outside area of a shape

Area of the two triangles are

A = bh

But we don't need to divide the b x h by half because there is another triangle so

A = bh

A = 6 x 4

A = 24

Then the base square is A = bh

A = 6 x 12 = 72

Then the square is A = bh

A = 5 x 12

A = 60 and since there is another square on the other side we add another 60

60 + 60 + 72 + 24 = 216

y + 11 = (1/4)(x + 16)

step-by-step explanation:

= 5

step-by-step explanation:

to find the 15th term substitute n = 15 into the nth term formula

= (- 3 × 15 ) + 50 = - 45 + 50 = 5