Opposite angles sum to 180°, giving x + 3y = 150 and 4x + y = 160. Solving gives x = 30 and y = 40. The angles are ∠A = 37°, ∠B = 48°, ∠C = 143° and ∠D ...
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Let the number be 10x + y. Then x + y = 15 and (10y + x) − (10x + y) = 9, which simplifies to y − x = 1. Adding both equations gives 2y = 16, so y ...
From 2:a to 3:b is 15 minutes, so (60 + b) − a = 15, giving a − b = 45. Given a = 6b, we get 5b = 45, so b = 9. The second time was 3:09. Class 9 ...
Robot 1 follows the line y = (4/3)x, while Robot 2 follows y = 2(x − 10). Equating them gives 2x − 20 = (4/3)x, which solves to x = 30 and y = 40. Their paths intersect at (30, ...
Robot 1 follows the line y = (4/3)x, while Robot 2 follows y = 2(x − 10). Equating them gives 2x − 20 = (4/3)x, which solves to x = 30 and y = 40. Their paths intersect at (30, ...