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podryga [215]
3 years ago
14

Each day, mr. ling has a boy and a girl summarize the assignment for the day. there are 8 boys and 9 girls in his group. in how

many different ways can the teacher select the two students? (see example 4.) ways
Mathematics
1 answer:
miv72 [106K]3 years ago
4 0
8x9=72

In 72 ways. Hope this helps.
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4 0
4 years ago
Vector a = 4i + 5j<br><br>Vector b = 3i + 6j<br><br>Find the dot product.
umka21 [38]

Step-by-step explanation:

a · b = (4)(3) + (5)(6)

a · b = 12 + 30

a · b = 42

5 0
3 years ago
Read 2 more answers
George spun a 6 sided spinner that had colors blue, red, white, yellow, black, and purple. She landed on blue-3 times, red-4-tim
STALIN [3.7K]

Answer:

\frac{2}{81}

Step-by-step explanation:

Step 1

List the experimental probabilities of each color using the first letter of that color. The spinner is spun 18 times The probabilities are listed below. P(blue)=3/18, P(red=4/18), P(white) =3/18, P(yellow)=2/18, P(black)=5/18, P(purple)=1/18

Step 2

The second step is to calculate the required probability given the information in step 1. The probability that George will spin a red and then a yellow is obtained by multiplying the probability that he spins a red and the probability that he spins a yellow. This calculation is shown below,

P=P(red)\times P(yellow)=\frac{4}{18} \times \frac{2}{18} =\frac{8}{324} =\frac{2}{81}.

The correct answer is  \frac{2}{81}

6 0
3 years ago
A bag of rice contains 17 1/2 cups of rice. Ken's children eat 2 1/2 cups of rice each day.
balu736 [363]

Answer:

The answer is "7".

Step-by-step explanation:

Given values:

\ bag \ of \ rice= 17\frac{1}{2} \\\\\ eating \ rice \ by \ ken \ per \ day = 2\frac{1}{2}\\\\\ rice = \frac{35}{2}\\\\ \ eat \ by \ day = \frac{5}{2}\\\\\ total \ days = \frac{\ bag \ value}{ \ eat \ by \ day}\\\\\ total \ days = \frac{\frac{35}{2}}{\frac{5}{2}}\\\\\ total \ days = \frac{35}{2} \times \frac{2}{5}\\\\\ total \ days = 7

4 0
3 years ago
Aaden wants to get a subscription to an online library. There are two subscription options, one of which charges a fixed 96 doll
pishuonlain [190]

Answer:

The data we have is:

Library A charges $96 per year.

Library B charges $3 per book he borrows.

Let's find the number of books X that he needs to borrow in order to spend the same amount in each library:

$3*X = $96

X = 96/3 = 32.

This means that if Aaden borrows 32 books per year, is the same for him if he chooses library A or B.

If he borrows more than 32 books per year, library A will be cheaper. (if he borrows 33 books, library B costs 33*$3 = $99, which is larger than the $96 of library A)

If he borrows less than 32 books per year, library B will be cheaper. (if he borrows 31 books library B costs $3*31 = $93, which is cheaper than the$96 of library A)

3 0
4 years ago
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