calc 1, limits

[exotic oasis]

I need help with the red colored mistakes, not sure how to do those..
ex: the answer accepts like for 1st ? (x+5-4) & for second ? 10x-0.75(x-5) -- on a different problem , but similar to this.

[mild bluff]

You should also show the graph maybe

[grizzled solstice]

the graph can't be seen

[exotic oasis]

oh ooos

oops

[grizzled solstice]

y = -2x for the 2nd one

y = (5/7)x + c
substitute (4, -2)
-2 = (5/7)(4) + c
-2 = 20/7 + c
c = -2 - 20/7
c = -34/7
y = (5/7)x - 34/7 for the 3rd one

[exotic oasis]

still says it wrong 😦

[grizzled solstice]

try to type it directly without the asterisks symbol

[exotic oasis]

oh tht was placed in there by the system