9.which of the following ordered pairs is a solution of the given system of linear equations answer choices and question are in picture you so much!

Option C. The solution is the point (1,8)

Step-by-step explanation:

we have

-----> equation A

----> equation B

Solve the system by elimination

Multiply the equation A by -1 both sides

-----> equation C

Adds equation C and equation B

Find the value of x

----> ---->

therefore

The solution is the point (1,8)

the answer is c

Step-by-step explanation:

all steps are pictured

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 is : muchas/tipicas

have a nice day!

~recklesschicken