What is the measure of angel A? Enter your answer as a decimal. Round the final answer to the nearest hundredth.

12.68°

Step-by-step explanation:

We know all three sides (18, 80, 82), but we only need two: 18, and 82. Why? What we do here is find the arcsin of the first leg divided by the hypotenuse.

arcsin(18/82)

18/82 is the same as 9/41, which equals 0.21951 repeating (all 5 digits after the decimal are repeating, by the way).

arcsin(0.21951)

What you see above this statement equals 0.22131 radians.

0.22131 rad

To convert this to degrees, multiply by 57.2957795.

0.22131 * 57.2957795

0.22131 times 57.2957795 is 12.680128961145.

12.680128961145°

The directions say the final answer has to be two decimal places. So this becomes 12.68 (0 is less than 5, so round down).

12.68°

Angle A is 12.68°.

srry idk

step-by-step explanation:

x = -3

y = -18

step-by-step explanation:

to solve by substitution, substitute one variable and solve for the other. then substitute again to find the remaining variable.

x-1/3(3x-9) = -3 since y=3x-9 substittute y.

x-1/3(3x-9)=-3

x + x +3 = -3

2x+3=-3

2x+3-3= -3-3

2x=-6

x=-3

substitute again into y=3x-9

y=3(-3)-9

y=-9-9

y=-18