The point A (5, 2) is reflected about the line x = 4, then about the line x = k. The final image is A" (1, 2). What is the value of k?

If a and b are the measures of two first quadrant angles and sin a = 4/9 and sin b = 2/5 find sin(a+b).

Sherina wrote and solved the equation. x-56=230 x-56-56=230-56 x=174 what was sherina’s error? sherina’s work is correct. sherina only needed to subtract 56 from 230. sherina made a subtraction error when subtracting 56 from 230. sherina should have added 56 to both sides of the equation.

Find the number of positive three-digit even integers whose digits are among 9, 8, 7,5, 3, and 1.