115
92
4*90 = 360
Yes, a triangle has a total of 180 degrees of its angles. Since a right triangle has one angle that is 90 degrees, the other two angles much add up to 180-90=90 degrees. 65+25=90.
That is exactly it, complementary means two angles that add up to 90 degrees. 25 is the complementary of 65, and vise versa.
90% of 25 = 25*90/100 = 22.5
25 ft lbs plus 90 degrees. for the 3 litre add another 90 degrees
25% of 90 micrograms= 25% * 90= 0.25 * 90= 22.5 micrograms
It is: (90-25)-25 = 40
90
Because they are two acute angles that add up to 90 degrees.
Complementary angles add up to 90 degrees. If one angle is 65 degrees, its complement is 90 - 65 = 25 degrees.
135 gallons. Let the multiple of 90 gallons to add be x, then using the percentages of antifreeze in the solutions: (25 + 50x) ÷ (1 + x) = 40 ⇒ 25 + 50x = 40 + 40x ⇒ 10x = 15 ⇒ x = 1.5 Therefore add 90 x 1.5 = 135 gallons.