There are 250 sixth grade students at the school.
Step-by-step explanation:
Given,
Percent of sixth graders who like hip hop = 40%
Number of sixth graders who like hip hop = 100
Let,
x represent the total number of sixth graders at school.
Therefore;
40% of x = 100
Dividing both sides by 0.40
There are 250 sixth grade students at the school.
Keywords: percentage, division
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Answer:
The expected value for the number of defects on a randomly selected plastic part is 0.43.
Step-by-step explanation:
We have the following probability distribution:
P(X = 0) = 0.79
P(X = 1) = 0.09
P(X = 2) = 0.05
P(X = 3) = 0.04
P(X = 4) = 0.03
What is the expected value, E(X), for the number of defects on a randomly selected plastic part?
Each value multiplied by its probability. So
The expected value for the number of defects on a randomly selected plastic part is 0.43.
Answer:
13- 139
Step-by-step explanation:
don't worry its not fake
2x-y=-1 (1)
3x-2y=1 (2)
(1) * 2--> 4x-2y=-2 (3)
(3) - (2)
x= -3
sub x= -3 into (1)
2(-3)-y=-1
-6-y=-1
-y=5
y= -5