Question

Help with algebra please (30 points)

Answer 1

The correct answer is a = 4

Answer 2

`Q6.\\v(x)=x^2-20\\\\v(x+4)=(x+4)^2-20=x^2+2(x)(4)+4^2-20\\=x^2+8x+16-20=x^2+8x-4`

`TRUE`

`Q7.\\c(x)=5x^2+12x,\ d(x)=7x+5x^2\\\\c(x)-d(x)=(5x^2+12x)-(7x+5x^2)=5x^2+12x-7x-5x^2\\\\=(5x^2-5x^2)+(12x-7x)=5x`

`Q8.\\f(x)=6x+1,\ f(a)=25\\\\f(a)=6a+1\\\\\text{substitute}\\\\6a+1=25\qquad|-1\\\\6a=24\qquad|:6\\\\a=4`