Hi there! To measure the angles, it’s best to have a protractor at hand. In terms of angles, complementary angles equal 90 degrees and supplementary angles equal 180 degrees. I could do this for you, but the angles aren’t always drawn to scale and it’s best to measure the angles out first before you do the other steps.
Scince the sum of a triangle is 180° just subtracts 180 from 67 which should be 113
A, seeing how the sign indicates that a, your age, is less than 12<span />
Answer:
Step-by-step explanation:
Let he speed of the boat on the lake is x.
<u>Considering the speed of the current it will take him:</u>
- 22.5/(x + 6) + 22.5/(x - 6) = 9
- 2.5 / (x + 6) + 2.5 / (x - 6) = 1
- 2.5(x - 6 + x + 6) = (x + 6)(x - 6)
- 2.5*2x = x² - 36
- x² - 5x - 36 = 0
- x = (5 ± √(5² + 4*36))/2 = (5 ± 13) / 2
- x = (5 + 13)/2 = 9 mph (negative root is discarded as the speed should be positive)
