3=a
Subtract a from both sides
18=6a
Then divide six on each side
3=A
First, you multiply $7.50 by 0.2 (20%) to get 1.5. Then, you just add 1.5 to 7.5, and your answer is $9.00.
The first one is x=-1
The second one is b=1
The third one is t=3
Answer:
P(A or B) = 0.9.
Step-by-step explanation:
This is a question of Venn probabilities.
We use the following relation to solve this question.

The exercise states that:

Then

The answer is:
P(A or B) = 0.9.
If we substitute 10 for t we get the height of the balloon after being in the air 10 minutes
h(10) = 210 - 15(10) = 210 - 150 = 60