I'm not sure what to do for the "arithmetic approach" but for the algebraic approach:
The equation you need to solve would be 5.35x + 182.90 = 750
when you solve it, you would get x = 106, meaning they would have to sell 106 more
Answer:

Step-by-step explanation:
we have

we know that
The equation of a vertical parabola into vertex form is equal to

where
(h,k) is the vertex of the parabola
and the axis of symmetry is equal to 
In this problem we have the axis of symmetry 
so
the x-coordinate of the vertex is equal to
therefore
For
-----> one unit to the right of the vertex
Find the value of 


For
-----> one unit to the left of the vertex
Find the value of 


Remember that
------> the x-coordinates are at the same distance from the axis of symmetry
so
------> solve for b



Answer:
Yes for 1st and 4th, No for the 2nd, 3rd and 5th.
Step-by-step explanation:
You need to plug the first number in each set of brackets into x and the second number into y. The first equation asks if y is the greater than -x. The only ones this is true for are the 1st, 3rd, and 4th answers, so the 2nd and 5th are no. Now check the 1st, 3rd and 4th to see if the answer is less than or equal to 2 when plugging in x and y. This is true for the 1st and 4th answers, so move those to yes and the 3rd to no.
Answer: Yes for 1st and 4th, No for the 2nd, 3rd and 5th.
(-10) + 14 + 25 + (-16) Add 14 and 25
(-10) + 39 + (-16) Change 39 + (-10) to 39 - 10
(-10) + 39 - 16 Subtract 16 from 39
(-10) + 23 Change (-10) + 23 to 23 - 10
23 - 10 Subtract 10 from 23
13
*Remember, you can rearrange expressions like this as long as each number keeps its sign. Notice that (-10) had its negative sign the whole time, even though we moved it around.
Answer:
The EcoShir shop
Step-by-step explanation:
as he needs to pay 4dollar for 1 shirt
so if he pays for 3 = 12 dollar for 4 shirts
and thus need to pay maximum 96 dollars
for 32 Tshirts
but needs to pay 120 in budgetShirts for 30 Tshirts