The sum of two numbers is 50 and twice the sum of money the number is 100.Make a pair of equations and solve them to find the numbers.​

Step-by-step explanation:

Let us represent

First number = x

Second number = y

The sum of two numbers is 50

Hence:

x × y = 50

xy = 50 Equation 1

x = 50/y

Twice the sum of money the number is 100.

2(x + y) = 100

2x + 2y = 100 Equation 2

We substitute 50/y for x in Equation 2

2(50/y) + 2y = 100

100/y + 2y = 100

Multiply through by y

100/y × y + 2y × y = 100 × y

100 + 2y² = 100y

Hence:

2y² - 100y + 100

f(x) is going down by 4

step-by-step explanation:

(its either that or its going left by 4)

option 3 . (5x + 1) - (-10x + 6)

step-by-step explanation:

option 1 :

(4x + 3) + (-9x + 4)

or 4x+3 -9x + 4

or -5x + 7

option 2

(x - 2) - (6x - 9)

or x-2-6x + 9

or -5x + 7

option 3

(5x+ + 6)

or 5x + 1 + 10x -6

or 15x -5

option 4

-4x+2x+7-3x

-7x + 2x + 7

-5x + 7

hence only option 3 did   not satisfy the given simplify expression.