The answer is D. Subtract 9y from both sides of the equation.
I believe x=116 and z=26. 4z-40=64
4z=104
z=26
180-64=116
Answer:
1/20
there are 20 students altogether
Step-by-step explanation:
um I'm not sure
Probability hit=40%=4/10
probability no hit=1-p (hit)=1-4/10=6/10
probability= p(hit)+p(hit)+p(hit)+p(hit)+p(hit)+p (no hit)+p (no hit)+p (no hit)
probability=4/10×4/10×4/10×4/10×4/10×6/10×6/10×6/10
=0.0022
( I think but I'm not 100% sure)
It will be 21/40
probability getting both white marbles
3/8×4/10=12/80
probability getting both black marbles
5/8×6/10=30/80
12/80+30/80=42/80= 21/80
