In this exercise we have to use subtraction knowledge to calculate the final value of the equation, like this:
Letter C
<h2>What is subtraction?</h2>It is a mathematical operation in which it is possible to find a quantity by decreasing one number by another, it is opposed to addition, being represented by the minus sign.
So make the calculus we have:
See more about subtraction at brainly.com/question/4319655
Answer:
1)
2)
Step-by-step explanation:
1)
Subtract 15 from both sides
Divide both sides by 2
this shows that 10 is the right answer
2)
Add 3 to both sides
Divide both sides by 7
this shows that 3 is the right answer
Hope this helps
Answer:
Required probability is 0.19
Step-by-step explanation:
The two-way table for the given data is,
Fiction Non-Fiction Total
9th grade 35 8 43
10th grade 52 12 64
Total 87 20 107
It is required to find the probability of the students who prefer to read non-fiction novels, given that they are in 9th grade.
That is, to find the conditional probability .
Now,
So, we get,