What is the surface area of the figure? 4 cm
3 cm
5 cm
1.5 cm
8 cm
o
A. 12 cm2
B. 24 cm
O
C. 28 cm2
O
D. 42 cm2

It should be 24 cm^2

Step-by-step explanation:

there are 3 shape. 2 rectangles and a triangle

to find the area for the rectangle is length x width

to find the area of a triangle its 1/2 x base x height

the small rectangle

4*1.5=6

the bigger rectangle

3*4=12

the triangle

1/2*4*3

1/2*12=6

Add them all up and you get 24

x= -3 and

step-by-step explanation:

to find the roots of a cubic, use division or factoring to find the factors then set equal to 0. as this is a difference of cubes, it factors into

where a is the cube root of .

here   this is 27 and the cube root of 27 is 3. so we write using the form:

.

set each factor to 0 and solve for x.

x-3=0

x=3

the quadratic expression does not factor and must be solved using the quadratic formula.

where a = 1, b=3, and c=9

this cubic has two complex roots.

a

step-by-step explanation: