MATHEMATICS HIGH SCHOOL

Mei Su had 80 coins. She gave most of them to her friends in such a way that each of her friends got at least one coin and no two of her friends got the same number of coins. What is the largest number of friends to whom Mei Su could have given coins?

Answers

Answer 1

Answer:

Answer: 12 friends.

Step-by-step explanation:

the data we have is:

Mei Su had 80 coins.

She gave the coins to her friends, in such a way that every friend got a different number of coins, then we have that:

The maximum number of friends that could have coins is when:

friend 1 got 1 coin

friend 2 got 2 coins

friend 3 got 3 coins

friend N got N coins

in such a way that:

(1 + 2 + 3 + ... + N) ≥ 79

I use 79 because "she gave most of the coins", not all.

We want to find the maximum possible N.

Then let's calculate:

1 + 2 + 3 + 4 + 5 = 15

15 + 6 + 7 + 8 + 9 + 10 = 55

now we are close, lets add by one number:

55 + 11 = 66

66 + 12 = 78

now, we can not add more because we will have a number larger than 80.

Then we have N = 12

This means that the maximum number of friends is 12.

Answer 2

Answer:

Answer:

Step-by-step explanation:

Related Questions

The mean age of five children is 8 years 4 months. When Amina joins, the mean age becomes 8 years 5 months. How old is Amina. With workings please.
What is the side length of a cube with a volume of 3375 cm3
1. Use words to write this expression:9 + 7x
What should be done to solve the following equation? d-8=9 A. Subtract 8 from both sides B. Add 8 to both sides C. add 9 D. subtract 9 from both sides
What is 42 percent of 85000

Two positive integers are 3 units apart on a number line. Their product is 108.Which equation can be used to solve for m, the greater integer?

m(m – 3) = 108

m(m + 3) = 108
(m + 3)(m – 3) = 108
(m – 12)(m – 9) = 108

Answers

Equation that can be used to solve m, if m is the greater integer is:
m(m+3)=108
Solution is: m=12 ( 12*9=108)
Answer: A) m(m-3)=108

Answer:

Step-by-step explanation:

Helpp me please. click the photo to see the question

Answers

Answer:

.42n = p

Step-by-step explanation:

We can write ratios to solve

2.52 / 6 = p/n

.42 = p/n

Multiply each side by n

.42n = p

Answer:

A is the answer

Step-by-step explanation:

You have to divide $2.42 by 6.

$2.52/6=0.42$

The unit rate would be

$p=0.42n$

So for every orange it will cost $0.42

Hope this helps

What is the y-value of the vertex of the function f(x) = –(x – 3)(x + 11)?The y-value of the vertex is

Answers

expand
f(x)=-1x^2-8x+33

x coordinate of vertex is -b/2a in the form ax^2+bx+c=y
a=-1
b=-8
-(-8)/2(-1)=8/-2=-4
plug back in to get y value

y=-(-4^2)-8(-4)+33
y=-16+32+33
y=49

y value is 49

Answer:

Step-by-step explanation:

Edge

The solution of the equation 2d - 6 = 5 is _____.

Answers

If you would like to solve the equation 2 * d - 6 = 5, you can do this using the following steps:

2 * d - 6 = 5
2 * d = 5 + 6
2 * d = 11 /2
d = 11/2
d = 5 1/2

The correct result would be 5 1/2.

$2d-6=5\n\nAdd\ 6\ on\ both\ sides.\n\n2d=11\n\nDivide\ by\ 2\ on\ both\ sides.\n\nd= (11)/(2)\n\nd=5(1)/(2)$

$\sf\ Answer:\ {\boxed{d=5(1)/(2)}}$

Find an ordered pair (x, y) that is a solution to the equation.
5x - y = 8

Answers

(2,2) could be a solution. :)

(0,-8) could be another.

The set of integers contains whole numbers and their _____.

Answers

Answer – Opposites
The set of integers contains whole numbers and their opposites. In other words, integers are set of numbers which contains the positive whole numbers, the negative whole numbers (i.e. opposite of the positive whole numbers), and zero. Integers do not contain fractions and decimals.

The set of integers contains whole numbers and their opposites

How to complete the blank

From the question, we have the following parameters that can be used in our computation:

The statement

By definition, integers are set of numbers which contains the positive whole numbers, the negative whole numbers (i.e. opposite of the positive whole numbers), and zero.

Also, integers do not contain fractions and decimals

This means that the set of integers contains whole numbers and their opposites.

Read more about integers at

brainly.com/question/1853272

#SPJ6

Other Questions

Mike and Kate plan to save money for their wedding over a 20 month period. They will need to save $8,000 to help pay for the wedding. They set aside the same amount each month. After a year they saved $4,000. Mike and Kate know they must adjust their plan in order to meet their goal, so they came up with the following options:Option A: Stay with saving the same amount they've been saving each month but postpone the wedding 2 months. Option B: Increase the amount of money they save each month by $80 from what they've been saving. Which of the following is a true statement? a. Only option A will allow them to meet their goal. b. Only option B will allow them to meet their goal. c. Both options A and B will allow them to meet their goal. d. Neither option A nor option B will allow them to meet their goal. Please select the best answer from the choices provided A B C D

21. find the volume of the solid of revolution formed if the area enclosed between the curves y=x² and y=(x-2)² is rotated about the x-axis using integration

Shade the model to show the decimal 0.674

1. 360 miles in 6 hours