The answer is A. u do the othe angle and add it to the fisrt one
Answer:
72 degrees.
Step-by-step explanation:
As it is a right angled triangle and if the smaller acute angle = x degrees then:
x + 4x + 90 = 180.
5x = 90
x = 18 degrees.
The larger acute angle = 4x = 4*18
= 72 degrees.
4x+3y=1 2x+5y=11
We'll need to use system of equations for this one.
4x+3y=1
3y=1-4x
y=-4/3x+1/3
2x+5y=1
5y=1-2x
y=-2x/5+1/5
Set these two equations equal to each other and solve for x.
-2x/5+1/5=-4/3x+1/3
x=1/7
Then plug x in to solve for y.
y=-2(1/7)/5+1/5
y=1/7
Probability of getting heads: 1/2
Probability to get 2 heads out of three tries is: 1/8
Work: 1/2 x 1/2 x 1/2 = 1/8
