Answer:
20
Step-by-step explanation:
Simplify both sides of the equation.
−4=
r
20
−5
−4=
1
/20
r+−5
−4=
1
/20
r−5
Flip the equation.
1
/20
r−5=−4
Add 5 to both sides.
1
/20
r−5+5=−4+5
1
/20
r=1
Multiply both sides by 20.
20*(
1
/20
r)=(20)*(1)
r=20
Probably the third sorry if im wrong
<span>A. When represented on a Poincaré Disk, a line is an arc that has endpoints. </span>
That would be by using a $1 bill, a $5 bill, and a $10 bill. Either the $1 bill or the $5 bill qualify as the "one of which is not the $10 bill". It's a matter of translating the question.
The solution for this problem is just adding and subtracting fractions. We all know how to add and subtract function because our teacher since high school teach us how to. P(Q or R) = P(Q) + P(R) - P(Q and R) = 5/8 + 1/8 - 1/32 = 23/32
The answer to this question is 23/32.