A rectangle's area is 7 units larger than its perimeter. The width of the rectangle is 3 units. What is the length of the rectangle in units?

length is 13 units

Step-by-step explanation:

case 1

l×b= 7+2(l+b)

lb = 7+2l+2b

given , b= 3

so,

l×3 = 7+ 2× l + 2× 3

3l -2l = 13

l = 13

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.

the anwser is d) 75°

step-by-step explanation: