How to solve 1/3(12-9y) step by step

how to solve 1/4(-16x+8) step by step both are separate questions

4-3y and 2−4x

Step-by-step explanation:

Use the distributive property to multiply 1/3  by 12−9y.

1/3⋅12+1/3 (−9)y

Multiply 1/3  and 12 to get 12/3.

12/3+1/3 (−9)y

Divide 12 by 3 to get 4.

4+1/3 (−9)y

Multiply 1/3  and −9 to get (−9)/3.

4+(−9)/3 y

Divide −9 by 3 to get −3.

4−3y

Use the distributive property to multiply 1/4  by −16x+8.

1/4 (−16)x+1/4⋅8

Multiply 1/4  and −16 to get (−16)/4.

(−16)/4 x+1/4⋅8

Divide −16 by 4 to get −4.

−4x+1/4⋅8

Multiply 1/4  and 8 to get 8/4.

−4x+8/4

Divide 8 by 4 to get 2.

−4x+2  

the surface area is 124cm²

step-by-step explanation:

length: 4cm

width: 9cm

height:   2cm

step-by-step explanation:

assume that you have 3 different side lengths.   apply the pythagorean theorem here:   square each of the two shortest sides; call them a and b, so that their squares are a² and b².   also square the longest side, calling the result c².

now, if a² + b² = c² is true, the triangle is a right triangle; otherwise it is not a right triangle.