Help please <3 5 easy Order of Operations questions.

13 - 2 + 15 divided by 3 + 11
10- 20 divided by 5+ 12 + 10
7 - 6 +8 x 16 x 7
10 x 9- 4 x 8 + 17
14 - 5 + 7 x 14 divided by 2

Please do the solving steps!

explanation:

step-by-step explanation:

about 168 miles

step-by-step explanation:

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°.

you estimate that the angle of elevation to the top of the 86th floor (the observatory) is 82 .the total height of the building is another 123 meters above the 86th floor.

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