I'm stuck on both I really need help and explanations

Step-by-step explanation:

the first sape

the area of the whole shape - unshaded  area : L*W-(l*w)

A=12*18-(3*4)

the second figure :

you can divided into three parts :(screenshot)

dimensions :

first part : l*w=3*6=18 cm²

second part:6*6=36 cm²

third shape : 9*6=54 cm²

10: total area  of the shape = 18+36+54 = 108 cm²

5

step-by-step explanation:

step-by-step explanation:

always plug in x. in this case, x equals 4.

i'm going to first solve 4(2+3x)

1) 4(2+3(4)) use pemdas to solve.

i'm going to multiply whats in the parenthesis first, so 3 times 4=12.

2)4 (2+12) i'm then going to multiply 4 by both numbers in the parenthesis (because multiplying comes before adding)

4 times 2= 8.   4 times 12= 48

4) (8+48)= 56 (answer)

i'm then going to solve 8+12x and plug in 4 for x.

1) 8 +12(4)

multiplying comes before adding, so i'm gonna multiply 12 and 4.

12 times 4= 48.

2) 8+48=56

both equal the same!