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ehidna [41]
3 years ago
8

7 girls and 5 boys in the seventh grade and 3 girls and 9 boys in the eighth grade. teacher randomly selects a seventh grader an

d an eighth grader. what is the probability that the students selected are both girls?
Mathematics
1 answer:
seropon [69]3 years ago
5 0
10 out of 24, or in simpler terms, 5 out of twelve
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What is the answer to (-10) - (-3)?
Zigmanuir [339]
The answer is -7 because when you minus a negative number you add it, and -10 + 3 is -7. I hope this helps!
3 0
3 years ago
PLEASE HELP!! A classmate wrote the set notation for the values of the domain of a function {−5, −4, −3, −2, −1, 0} as {x | −5 ≤
vfiekz [6]
<h3>Answer: Choice B</h3>

The set notation includes all values from -5 to 0, but the domain only includes the integer values

eg: something like -1.2 is in the second set, but it is not in the set {-5,-4,-3,-2,-1}

==========================================================

Further explanation:

Let's go through the answer choices one by one

  • A. This is false because 0 does not come before -5, but instead -5 is listed first. The order -5,-4,-3,-2,-1,0 is correct meaning that -5 \le x \le 0 is the correct order as well.
  • B. This is true. A value like x = -1.2 is in the set \left\{x| -5 \le x \le 0\right\} since -1.2 is between -5 and 0; but -1.2 is not in the set {-5, -4, -3, -2, -1, 0}. So the distinction is that we're either considering integers only or all real numbers in this interval. To ensure that we only look at integers, the student would have to write \left\{x| x\in\mathbb{Z}, \ -5 \le x \le 0\right\}. The portion x \in \mathbb{Z} means "x is in the set of integers". The Z refers to the German word Zahlen, which translates to "numbers".
  • C. This is false. The student used the correct inequality signs to indicate x is -5 or larger and also 0 or smaller; basically x is between -5 and 0 inclusive of both endpoints. The "or equal to" portions indicate we are keeping the endpoints and not excluding them.
  • D. This is false. Writing -5 \ge x \ge 0 would not make any sense. This is because that compound inequality breaks down into -5 \ge x \ \text{ and } \ x \ge 0. Try to think of a number that is both smaller than -5 AND also larger than 0. It can't be done. No such number exists.
8 0
3 years ago
3(x + y + h)=<br> Can someone help me with this
Nastasia [14]

Answer:

3x +3y +3h

that’s the farthest you can solve since you don’t know the variable’s values

4 0
3 years ago
What is the n in 4 1/2 = 1 1/2n; n =
jasenka [17]

Answer:

9/11

Step-by-step explanation:

4 1/2= 9/2=11/2n

so n =9/11

so 9/2=11/2*9/11

8 0
3 years ago
PLEASE HELP ME!!! WILL MARK AS BRAINLIEST!!!!!!!
frez [133]
Esmeralda I think it's wrong cuz it’s like the question but that's added a parentheses so I think that's wrong
8 0
3 years ago
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