Verify that the indicated pair of functions is a solution of the given system of differential equations on the interval (−[infinity], [infinity]). d2x dt2 = 4y + et d2y dt2 = 4x − et x = cos(2t) + sin(2t) + 1 5 et y = −cos(2t) − sin(2t) − 1 5 et When x = cos(2t) + sin(2t) + 1 5 e

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

mark branliest

step-by-step explanation:

.6 is 1/2 of 12

the answer is actually d. i just took the test

answer: about 22.67

step-by-step explanation:

should have been evaluated with one odd value and one even value. the expressions have equivalent values when . when , the first expression has a value of 3 and the second

step-by-step explanation: