1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Reptile [31]
2 years ago
6

Ron finds 9 books at a bookstore that he would like to buy, but he can afford only 5 of them. In how many ways can he make his s

election? How many ways can he make his selection if he decides that one of the books is a must?
a. 3024; 1680
b. 7560; 840
c. 120; 1680
d. 126; 70
Mathematics
1 answer:
olga55 [171]2 years ago
6 0

Answer:

d. 126; 70

Step-by-step explanation:

given that Ron  finds 9 books at a bookstore that he would like to buy, but he can afford only 5 of them.

Out of 9 books he has to select 5 of them

Here selection of books can be done in any order.  Hence order does not matter

No of ways he selects 5 books out of 9 books = 9C5

= 126

Part II

One book is a must

Hence he has options only 4 books from the remaining 8.

No of ways when one book is compulsory = selecting 3 books from 8 books

= 8C4

= 70

Option d is right.

You might be interested in
Which values, when placed in the box, would result in a system of equations with no solution? Check all that apply.
son4ous [18]

For this case we have the following system of equations:

y = -2x + 4\\6x + 3y =

Rewriting equation 1 we have:

2x + y = 4

Therefore, the equivalent system is:

2x + y = 4\\6x + 3y =

The system will have no solution, if we write equation 2 as a linear combination of equation 1.

Therefore, since both lines have the same slope, they are parallel.

Parallel lines do not intersect when they have different cut points.

Therefore, there is no solution for:

-12, -4, 0, 4

The system has inifinites solutions for:

12

This is because the lines intersect at all points in the domain.

Answer:

The values, when placed in the box, would result in a system of equations with no solution are:

A: -12

B: -4

C: 0

D: 4

8 0
3 years ago
Read 2 more answers
Heres how i lok by the way
REY [17]
OKAY!!! LOVE IT OKAY!
6 0
3 years ago
Read 2 more answers
uhhhh will give brainiest, find the frequency of the intervals. 5 points uhh no bots or spam give the correct answer
makvit [3.9K]

Step-by-step explanation:

Determine the data range of the data set.

Decide the width of the class intervals.

Divide the range by the chosen width of the class interval to determine the number of intervals.

4 0
3 years ago
A rectangle is dilated by a scale factor of 4.
Elanso [62]
A) The new dimensions would be 32cm by 12cm.
B) This is an enlargement.

To find the new dimensions, multiply the original dimensions by the scale factor.  8*4=32 and 3*4=12.

This is an enlargement because the copy is larger than the original.
7 0
3 years ago
2x + y = 3<br> 4x + 4y = 8
den301095 [7]

Answer:

Point form : (1,1)

Equation form : x=1 , y=1

Step-by-step explanation: Solve for the first variable in one of the equations, then substitute the result into the other equation.

Hope this helps you out! ☺

7 0
3 years ago
Other questions:
  • Question is in the picture. Please help!
    15·1 answer
  • Rewrite the equation below in standard form. -3x+6y=12 A.3X-6Y B.3X-6Y=-12 C.-X+2Y=4 D.X-2Y=-4
    13·2 answers
  • Order the numbers from least to greatest. 0.462; 0.436; 0.435; 0.478
    8·1 answer
  • I need help with this question please and thank you
    15·1 answer
  • Solve for x.<br> -7&gt;13-5x
    14·2 answers
  • The ratio of pages read to minutes for Hang is 5 : 8. Who has a greater ratio of pages read to minutes than Hang? Select all tha
    5·1 answer
  • Find the surface area of the pyramid. The side lengths of the base are equal.
    8·1 answer
  • PLZ HELP ASAP!! Find the Area
    6·1 answer
  • What is the distance between a and b <br>a 45<br>b 20<br>c 25<br>d 60​
    5·1 answer
  • 2-2-2-2-2-2-2-2-2-2-2-2-2-2-2-2-2-2-2-2-2-2-2
    14·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!