Kelly had s-15 in her checking account. she did a few chores and made 38.50. she decided to pay for her and a friend to go t on the movies, and each ticket cost 7.75 how much money does she have in her checking account?

Total Amount in the checking account=S+8

Step-by-step explanation:

Total Amount in the checking account=Initial Amount in the checking account+Earnings from chores-Expenditure on movie tickets

where;

Initial amount in the checking account=S-15

Earnings from chores=38.5

Expenditure on movie tickets=Cost per ticket×Number of tickets=(7.75×2)=15.5

Replacing;

Total Amount in the checking account=(S-15)+38.5-15.5=S+38.5-15-15.5

Total Amount in the checking account=S+8

step-by-step explanation:

if you meant, "on the way from (3, 2) to (3, 14):

x does not change; y increases by 12.

ensure that you have copied down this problem correctly.   .

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