And a midline at 5. Which of the following equations satisfies these conditions?
A sinusoidal function has an amplitude of 4, a frequency of our
O A. f(x) = 4 sin(3x) +5
B. f(x) = 4 sin +5
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O C. f(x) = 4 sin 6X+5
O D. f(x) = 4 sinš +5

- (2, -7)

- lines r and s and lines t and u must be parallel

1. 180°. the sum of the interior angles of a triangle is 180°, for the equilateral triangle that it has three equals side is 60°+60°+60°=180°.

2. 60°. each interior angle of a equilateral triangle is 60°

3. 120°. the measure of ∠m is 120°, the sum of the angles ∠m and ∠n is equal to 180°. so, in order to find the measure of ∠m, we have ∠m+∠n=180° > ∠m=180°-∠n > ∠m=180°-60°=120°.

4. 360°. the sum of the exterior angles of an equilateral triangle is ∠m+∠r+∠x=120°+120°+120°=360°. the exterior angles of any triangle always add 360°.