Answer:
42−{(7+14)÷7}×4
42 - { 21/7} x 4
42 - 3 x 4
42 - 12
30
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9. Angle LSM and Angle 2 are pair of vertical opposite angles which are equal.
10. Angle forming vertical pair with Angle 1 is Angle LSO (Angle 3).
12^2 +b^2 = 20^2 because of the Pythagorean theorem
144 + b^2 =400
B^2 =256
B=16
Answer:
number 10
dy/dx =(dy/dt).(dt/dx)
now find
dy/dt=4t-1. , dt/dx=1
so : dy/dx=(4t-1).(1)
dy/dx= 4t-1 ,we have x=t-3-----> t=x+3
subtitute at t
dy/dx= 4(x+3)-1=4x+12-1= 4x+11