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Olenka [21]
3 years ago
14

On a book shelf there are 4 (different) math books and 6 (different) cs books. In how many ways can the books be arranged so tha

t the math books are next to each other and the cs books are next to each other?
Mathematics
1 answer:
Angelina_Jolie [31]3 years ago
4 0

The answer is 1728 way

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150 students were surveyed on how many text messages to send in a date for different devices. let X represent the number of stud
kakasveta [241]

Given that the total number of students that sent messages = 150 students

a) To obtain the equation to represent the number of students who send text messages, we will sum up the variables in the Venn diagram and equate it to 150.

\begin{gathered} 75+x+3x+x=150 \\ x+3x+x=150-75 \\ 5x=75 \end{gathered}

Hence, the equation is

5x=75

b) Solving for x

\begin{gathered} 5x=75 \\ x=\frac{75}{5}=15 \\ \therefore x=15 \end{gathered}

Therefore, x = 15.

c) The total number of student that uses cell phone = 75 + x = 75 + 15= 90students

The total number of students that sent messages = 150students

The formula for probability is,

\text{Probability = }\frac{\text{Number of students that uses cell phone}}{\text{Total number of students}}

Hence,

P(\text{Number of students that uses cell phone)}=\frac{90}{150}=\frac{3}{5}

Therefore, the probability that a randomly chosen student uses their cell phone to send text messages ​is 3/5.

7 0
1 year ago
Juan's 3 math quizzes this week took him 1/3 hour, 4/6 hour, and 1/5 hour to complete. Which list shows the lengths of time from
Marysya12 [62]
The order from least to greatest would be 1/5, 1/3, then 4/6.

To solve, multiply the fractions so that they all have the same denominator. I multiplied the 1/3 by 10, 1/5 by 6, and 4/6 by 5. After they all have a common denominator, you can easily order them from the numerator.

10(1/3) = 10 / 30
6(1/5) = 6 / 30
5(4/6) = 20 / 30
6/30, 10/30, 20/30

Hope this helps! :)
7 0
2 years ago
Find negative square root of 49.
Elena L [17]

Answer:

-7

Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
1.2*10to the fifth+ 5.35*10to the sixth
mart [117]
1.2*10^5 + 5.35*10^6 = 5,470,000 :))
7 0
3 years ago
Jenny's Coffee Shop makes a blend that is a mixture of two types of coffee. Type A coffee costs Jenny $4.40 per pound, and type
postnew [5]

Answer:

221 pounds of type A coffee

Step-by-step explanation:

$4.40 x 221 = $972.4

Hope this helped! :)

7 0
2 years ago
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