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.
90% of 25 = 25*90/100 = 22.5
That is exactly it, complementary means two angles that add up to 90 degrees. 25 is the complementary of 65, and vise versa.
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.