¹/₂x + 25 = -100
<u> - 25 - 25</u>
2 · ¹/₂x = -125 · 2
x = -250
<u>
Check</u>
¹/₂x + 25 = -100
¹/₂(-250) + 25 = -100
-125 + 25 = -100
-100 = -100
Your answer is correct.
Answer:
777
Step-by-step explanation:
25/10x4=10 boys
100%-40%=60%
25/10x6= 15
boys:girls
10:15
Answer:
100%
Step-by-step explanation:
Use conditional probability:
P(B | A) = P(B and A) / P(A)
P(B | A) = (12/28) / P(A)
We need to find the probability that a student studies art.
P(A or B) = P(A) + P(B) − P(A and B)
24/28 = P(A) + (12+12)/28 − 12/28
P(A) = 12/28
P(B | A) = (12/28) / (12/28)
P(B | A) = 1
What this means is that all of the students who study art also study biology.
