I THINK the answer is compatible numbers.............. but I'm pretty sure it is compatible numbers
3(4 - x) <= 54
12 - 3x <= 54
-3x <= 42
x >= -14 answer
Its A
Answer:
C
Step-by-step explanation:
my teacher tells us that that answer is the most inportant in math in any grade
X= width
length= 3x-7
Area: (x)(3x-7)=40
= 3x^2-7x=40
= 3x^2-7x-40=0
Factorise the equation: (3x+8)(x-5)=0
x=-8/3 (reject because width cannot be negative) or x=5
so width is 5cm and length is 3(5)-7= 8cm !
