B. 1 and 3
Triangle 1 is considered scalene as it has 3 sides all different sizes
And the same applies for triangle 3
Cos (180) = - 1
I just plugged it into a calculator.
Answer:
See explanation
Step-by-step explanation:
The standard compound interest formula is
where:
P is the principal amount
r is the interest rate (typically as a percentage)
t is the time
n is the times compounded per unit of time
So,
1) 
2) 
3) 
You should check my answers though, I may have mixed up some terms.
There are three fourths in six eights.
Answer:
13
Step-by-step explanation:
3(7)-4x
3(7)-4(2)
21-8
=13