Answer:
Since r is the distance from the origin to (x,y), it is the magnitude r=√x2+y2. Alternatively, from the equation (1), one can calculate directly that x2+y2=r2cos2θ+r2sin2θ=r2(cos2θ+sin2θ)=r2.
Step-by-step explanation:
Answer:
28. the second and third one
29. 687.50 dollars
Step-by-step explanation:
2.49(2) + 1.79(2) + 0.89(4) = 12.12 no
2.49(3) + 1.79(2) = 11.05 yes
2.49(2) + 1.79(3) + 0.89 = 11.24 yes
2.49(4) + 1.79 + 0.89 = 12.64 no
area = length times width
a = 6.25 times 5
a = 31.25 square feet
31.25(22) = 687.50
Answer:
3x+30= 116° 2x=64°
Step-by-step explanation:
the angle below 2x is the same as 3x+20 so we know that 5x+20=180 so solve this
5x+20=180
5x=160
x=32
sub x into the angle equations
3(32)+20=116
2(32)=64
32/6 - 4 5/7
32/6 - 20/7
52/21 = 2 10/21 or 2.47
