How to do this question i need to go to school on 1/9

1 pack = $7.90

10 packs = $7.90 x 10 = $79

Celia pays $29 plus a voucher to equal $79.

29 + (voucher) = 79

(voucher) = 50 subtracted 29 from both sides

$50

answer: 414,377,008

step-by-step explanation:

just multiply it

answer: 204

step-by-step explanation:

we are told that the revenue is

x⋅(4080−10x)=−10x^2+4080x

this is a quadratic function, so to maximize it we should find the x-value of its vertex. recall that the x-value of the vertex of the parabola ax^2+bx+c is given by the formula −b/2a.

so in this case, we have a=−10 and b=4080, so the x-value of the vertex is

−b/2a= −(4080)/2(−10)=204