Answer:
92
Step-by-step explanation:
The angles are vertical angles and vertical angles are equal
? = 92
92 degrees
the 92 degree angle is congruent to the missing angle
the equation is 10x+50=120
the rate of change is 10x (time)
the initial value is 50
the total value is 50
he will need to save for 7 weeks
cos(X+Y) = cos(55+35) = cos(90) = 0
cos(X+Y) = cosXcosY - sinXsinY
cos(55+35) = cos(55)cos(35) - sin(55)sin(35)
cos(55+35) = cos(55)cos(35) - cos(90-55)cos(90-35)
cos(55+35) = cos(55)cos(35) - cos(35)cos(55)
cos(55+35) = 0
cos(90) = 0
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