Let x be the number of 5 points question.
Let y be the number of 2 points question.
Total number of questions is 38
x + y = 38
Total points is 100
5x + 2y = 100
x + y = 38 ------------- (1)
5x + 2y = 100 ---------(2)
From (1):
x + y = 38
x = 38 - y -------------- sub into (2)
5(38 - y) + 2y = 100
190 - 5y + 2y = 100
3y = 90
y = 30 ------------------ sub into (1)
x + 30 = 38
x = 38 - 30
x = 8
There are 8 5-point questions and 30 2-point questions
Answer:
0 and - 13/15
Step-by-step explanation:
Answer:
the second one is the anwser
Step-by-step explanation:
Solution:
<u>Given function:</u>
<u>Solution (x = -2):</u>
- f(x) = x - 1
- => -2 - 1
- => -3
<u>Solution (x = 0):</u>
- f(x) = x - 1
- => 0 - 1
- => -1
<u>Solution (x = 2):</u>
<u>Solution (x = 3):</u>
- f(x) = x - 1
- => f(x) = 3 - 1
- => 2
Answer:
B and C
Step-by-step explanation:
5 * (7 + 6s - 9t) = 7*5 + 6s *5 - 9t*5
= 35 + 30s - 45t
(-35 - 30s + 45t)*(-1) = (-35)*(-1) - 30s *(-1) + 45t*(-1)
= 35 + 30s - 45t
