80
The question implies that you're counting by tens & the number comes after 70 and before 90. This is the only number that fits this description.
Answer:
(x, y, z) = (7, 9, 90)
Step-by-step explanation:
The two acute angles between l1 and l2 are vertical, so congruent.
(9x -7) = 8x
x = 7 . . . . . . . . . add 7-8x
These are supplementary to the obtuse angle between those lines:
8(7) + (13y +7) = 180
13y = 117 . . . . subtract 63
y = 9 . . . . . . . divide by 13
The angle marked z is supplementary to the angle marked as a right angle.
z + 90 = 180
z = 90
Answer:
6 6/7
Step-by-step explanation:
So basically you would start off by asking how many 7s go into 48. the lowest number is 42. 6 7s go into 42. then 6 is the rest.
Answer:
They are different because they have different signs
Step-by-step explanation:
In 4,9 both values are positive whereas in 4,-9 the 9 is negative and the 4 is positive.
