What number should be placed in the box to help complete the division calculation? (1 point) Long division setup showing an incomplete calculation. 15 is in the divisor, 7978 is in the dividend, and 5 hundreds and 3 tens is written in the quotient. 7500 is subtracted from 7978 to give 478. An unknown value represented by a box is being subtracted from 478.

450

Step-by-step explanation:

Given the long division setup :

Divisor = 15

Quotient = 5 hundreds and 3 tens

Dividend = 7978

7500 subtracted fromn7978 to give 478

Find the unknown number subtracted from 478

Kindly see answer and steps in the picture attached :

linear

step-by-step explanation:

{x = -1/2 ,   y = -1

step-by-step explanation:

solve the following system:

{2 x + y = -2

{10 x - 3 y = -2

in the first equation, look to solve for y:

{2 x + y = -2

{10 x - 3 y = -2

subtract 2 x from both sides:

{y = -2 x - 2

{10 x - 3 y = -2

substitute y = -2 x - 2 into the second equation:

{y = -2 x - 2

{10 x - 3 (-2 x - 2) = -2

10 x - 3 (-2 x - 2) = (6 x + 6) + 10 x = 16 x + 6:

{y = -2 x - 2

{16 x + 6 = -2

in the second equation, look to solve for x:

{y = -2 x - 2

{16 x + 6 = -2

subtract 6 from both sides:

{y = -2 x - 2

{16 x = -8

divide both sides by 16:

{y = -2 x - 2

{x = -1/2

substitute x = -1/2 into the first equation:

{y = -1

{x = -1/2

collect results in alphabetical order:

answer:   {x = -1/2 ,   y = -1