Answer:
405
Step-by-step explanation:
10% of 450 is 45 and 450-45=405 students
Answer 0.40
Step by Step
3/20=0.15
25.% (move the decimal back two places) 0.25
0.15+0.25=0.40
Answer:
1.39%
Step-by-step explanation:
(21 - 32) / 5 = -2.2 z score
= 0.0139 so there is a 1.39% probability
I would be able to help but I need it to be in English
Answer:
solution: (3, 5)
Step-by-step explanation:
Solve this system of equations
{2x + y = 11
{5x - y = 10
add the equations to use elimination method.
2x + 5x + y - y = 11 + 10;
7x = 21
x = 21/7 = 3
x = 3
y = 11 - 2x = 11 - 2*3 = 11 - 6 = 5
