Question

A rectangle has a height of 4x and a width of 3.+ 1.

Answer 1

Answer:

$12x^2+4x$

Step-by-step explanation:

The area of a square or rectangle can be found by multiplying the width by the height. Since we now both, we can create an expression.

$(3x+1)*(4x)$

Now we can apply the distributive law/property to expand the expression.

$3x(4x)+1(4x)$

Finally, we can simplify.

$12x^2+4x$