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!

since the airplane is moving with constant speed then the distance travelled can be calculated by x=u*t

in km/h would be:

x=640*3.5=2.240 km

in m/s would be:

u=640 km/h= 640.000 m/h =640.000/ 3600 m/s =177.8 m/s

t= 3.5 h= 3.5 * 3600 s=12.600 s

then x=u*t= 177.8*12.600= 2.240.280 m

answer: 20

step-by-step explanation: