X × 75% = £45
x = £45 / 75%
x = £45 / 0,75
x = £60
Normal circle area is πr², which is (d/2)²π.
That makes your case 14²π divided by 2 is 196π/2=98π cm²
So hope it goes well but the answer is 11
Multiply the parentheses then collect like terms
(x+4y+z) (x-7y)
x^2-7xy+4xy-28y^2+xz-7yz
x^2-3xy-28y^2+xz-7yz
