Dwayne wants to buy a jump rope that costs $4, a board game that costs $7, and a playground ball that costs $3. He has saved $9 from his allowance, and his uncle gave him $4. How much more money does Dwayne need to buy the jump rope, the game, and the ball?

he needs $1

Step-by-step explanation:

add 4+7+3=14 then your gonna add what he already has which is 9+4= 13 so 14-13=1

-2

7 - 9 = -2

reversed:

-2 + 9 = 7

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