Answer:
I: 4x-5y=-10
II: 2x-7y=4
c) multiply the second equation by -2 and add the result to the first equation
II*-2=-4x+14y=-8
add I+II*-2: 4x-5y+(-4x+14y)=-10-8
=9y=-18
Step-by-step explanation:
Tell them what comes first and what comes last
You go it right it's the first one
Y = -7sin(x) + 2cos(x)
y = -7sin(3π/4) + 2cos(3π/4)
y = -7sin(9.42/4) + 2cos(9.42/4)
y = -7sin(2.355) + 2cos(2.355)
y = -7(0.03698381721) + 2(0.9993158646)
y = -0.2588867205 + 1.998631729
y = 1.739745009
