Answer:
17 and 53.
Step-by-step explanation:
Let the two unknown numbers be x and y respectively.
Translating the word problem into an algebraic expression, we have;
x + y = 70 ...... equation 1
x - y = 36 ...... equation 2
From equation 1;
x = 70 - y ...... equation 3
Substituting eqn 3 into eqn 2, we have;
70 - y - y = 36
70 - 2y = 36
70 - 36 = 2y
2y = 34
y = 17
Next, we find x;
x = 70 - y
x = 70 - 17
x = 53
Answer:
30 hrs
Step-by-step explanation:
Downstream. In water, the direction along the stream is called downstream.
Upstream. In water, the direction against the stream is called upstream. Let the speed of a boat in still water be u km/hr and the speed of the stream be v km/hr, then. Speed downstream = (u + v) km/hr. Speed upstream = (u - v) km/hr
Answer:
acute angle measure less than 90 degrees, right angle measure 90 degrees, Obtuse angle measure more than 90 degrees, straight angle equal to 180 degrees, reflex angle is an angle greater than 180° and less than 360°, complementary angle either of two angles whose sum is 90°, supplementary angle either of two angles whose sum is 180°
