Factor the expression

20k + 50

-2.5

Step-by-step explanation:

Simplifying

20k + 50 = 0

Reorder the terms:

50 + 20k = 0

Solving

50 + 20k = 0

Solving for variable 'k'.

Move all terms containing k to the left, all other terms to the right.

Add '-50' to each side of the equation.

50 + -50 + 20k = 0 + -50

Combine like terms: 50 + -50 = 0

0 + 20k = 0 + -50

20k = 0 + -50

Combine like terms: 0 + -50 = -50

20k = -50

Divide each side by '20'.

k = -2.5

10(2k+5)

Step-by-step explanation: All we have to do is return this back to the distributive form since the expression shown here has already been distributed. Hope this helps!

option 1 is correct.

step-by-step explanation:

y varies inversely with x and constant of variation is 4

the equation will be:

y = k/x

where k =4 so,

y = 4/x

if we put values of x of option 1 in the above equation and find values of y

y = 4/-2 => y =-2

y = 4/-1 => y = -4

y = 4/1 => y = 4

y = 4/2 => y =2

so, all the values of x and y are correct.

if we put values of x given in other options and find value of y we cannot find whole table satisfying the equation.

hence option 1 is correct.