Answer:
108 cm²
Step-by-step explanation:
Area of a rectangle, A = length, l × width, w
Perimeter of a rectangle = (2 × length) + (2 × width)
42 cm = 2l + 2w
<em>but</em><em> </em>length = w + 3cm
42 cm = 2(w + 3cm) + 2w
42 cm = 2w + 6cm + 2w
42 cm = 6cm + 4w
4w = (42 - 6) cm
4w = 36 cm
》w = 9cm
》l = w + 3cm = 9cm + 3cm
l = 12 cm
Area = 12 × 9 = 108 cm²
B.) f(x)=(x^2-3)^2
a.) f(x)= (x^2+6)(x^2+5)
-x = 2 - 3x + 6
Add 3x to both sides.
-x + 3x = 2 + 6
Simplify.
2x = 8
Divide both sides by 2.
x = 4
~Hope I helped!~
Answer:
k= 70
Step-by-step explanation:
it would be 16 times larger