The children's museum sells caps and t-shirts, for a total of 278 items, at its annual fundraiser. They take in a total of $2110. Caps cost $8, and t-shirts cost $7. How many caps did they sell? Let C number of caps sold, and let t the number of t-shirts sold.​

y=x+9

?

step-by-step explanation:

let's call the solutions x₁ = (5 - 2√7)/3 and x₂ = (5 + 2√7)/3

then the equation is (x-x₁)(x-x₂) = 0

if you fill that in you get a lot of numbers which you can recognize as ax²+bx+c=0.

step-by-step explanation:

you can see that a=1 (there is just an x²)

b = (-5 -2√7 + 2√7 - 5)/3 = -10/3

c = -2√7)/3 ) * (-5+2√7)/3) = -1/3

so your answer is 3x^2 – 10x – 1 = 0

i think the answer is b. i hope i !

$25 becasue a 10 increase would make it from 80 to 50