The area of a square is its side length squared. So the side length of the square squared is 42, so the side length of the square is sqrt(42). The perimeter of the square is 4 times the side length, or 4sqrt(42), which is approximately 25.92.
I think the answer is a. f(x)= cos(x).
Answer:
the no. is -7
Step-by-step explanation:
let the no. be x
5x-x+2=-26
=> 4x+2=-26
=> 4x=-26-2
=> 4x=-28
=> x=-28/4
=> x=-7
please mark as brainliest
l need it
Give the 2 numbers variables,say x and y.
then they multiply to -225.this means xy=-225
they add to 16.this means x+y=16
y=16-x
substitute y=16-x onto xy=-225 to get x(16-x)=-225
then expand to get 16x-x^2=-225
rearrange to get a quadratic: x^2-16x-225=0
x=(16+(16^2-4*-225)^0.5))/2 or
x=(16-(16^2-4*-225)^0.5))/2
