Answer:
Step-by-step explanation:
a + 9 = 15
a = 15 - 9
a = 6
c + 9 = 16
c = 16 - 9
c = 7
d = c + 9
= 7 + 9
= 16
e = d + 15
= 16 + 15
e = 31
P(selecting a boy) = total boy /total pupils = 16/31
There are infinite solutions.
By observing the inequality, we can tell that the unknown number, n, is greater than the number 4.
Answer
C, D
Step-by-step explanation:
It's a right triangle b/c one of the angles are 90 degrees.
It's Isosceles b/c 2 of the sides are the same length.
(Edited) (thank you to the poster of this question for reminding me that right triangles cannot be acute)
