Answer:
21
Step-by-step explanation:
6 times 8 = 48-12=36 divided by 3 =12+9=21
Answer:
Y=4x-9
Step-by-step explanation:
The line is at -9 when it's on the y axis
It goes up 4 over 1
Answer:
(11r + 8t)(11r - 8t)
Step-by-step explanation:
difference of two squares
Step-by-step explanation:
there are 50 students and 5 prizes (1 + 1 + 3).
so, already in natural language we would say "there is 1 prize for every 10 students".
formally, remember the rule of probability : desired outcomes over total possible outcomes.
this is here
5/50 = 1/10 = 0.1
your can see it also this way :
if there was only 1 prize, each student would have a chance of 1/50 of winning.
now there are 5 prizes, which gives everybody 5 times the chance of winning. which is then 5×1/50 = 5/50 = 0.1
