A = amount
.01a + .05a + .1a = 1.28
Combine like terms.
.16a = 1.28
Divide both sides by .16.
a = 8
8 * 3 = 24
There are 24 coins in the wallet.
We have 3 white balls in the first urn out of 9. That means we have a 1 in 3 chance at picking the white ball in the first urn.
Now, we have a 3 in 11 chance at picking the white ball in the second urn.
Since, we want them simultaneously, we need to multiply them.
1/3 × 3/11 = 1/11 chance
Answer: B!
Step-by-step explanation:
Hi.
First, I am going to give you some definitions.This will help you do the problems.
-Complementary angles have a combined sum of 90.
- Supplementary angles have a combined sum of 180.
10. 40+50=90- so YES.
12. 159+20= 179.-so NO.
Make sure you learn the definitions properly next time!
=)
