an appliance shop orders 24 boxes of small electric fans ( where all boxes contain the same number of small fans) and 25 boxes of bigger electric fans ( where all boxes also contain the same number of...

an appliance shop orders 24 boxes of small electric fans ( where all boxes contain the same number of small fans) and 25...

MA

Mischievous Angel

25 tháng 4 2016 - olm

A box of erasers cost 4 dollars. A box of pencils cost 6 dollars more. Darwin spent 240 dollars on some boxes of erasers and pencils. The ratio of the number of pencil boxes to the number of eraser boxes was 4:5. How many boxes of pencils did he buy?

#Toán lớp 8

5

CH

Cô Hoàng Huyền

Admin VIP

26 tháng 4 2016

Hint: Supppose that Darwin bought x eraser boxes, then he bought \(\frac{4}{5}x\) pencil boxs. (\(x\in N,x>0\)

Because Darwin spent 240 dollars so we have equation:

\(4x+\left(4+6\right).\frac{4}{5}x=240\)

\(\Rightarrow12x=240\Rightarrow x=20\)

So Darwin bought 20 eraser boxes and 16 pencil boxes.

Have a good time :))

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TD

Tứ Diệp Thảo_TFBoys

25 tháng 4 2016

I don't no

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LQ

Lưu Quốc Việt

1 tháng 1 2020 - olm

A certain number of fifty-cent coins is to from an equilateral triangle. The same number of fifty-cent coins can also be used to from a square. The number of fiftty-cent coins on each side of the square is 6 fewer than the number of fifty-cent coins on each side of the equilateral traingle. How many fifty-cent coins are there altogether?

#Toán lớp 8

0

AA

Ai Ai

23 tháng 7 2020

There're four black box and each box has the same number of marbles. Only one of the following statements is correct about the number of marbles in it.

- Five or Six

- Seven or Eight

- Six or Seven

- Seven or Five

How many marbles are there in each box?

#Toán lớp 8

3

MN

Minh Nguyệt

23 tháng 7 2020

À là 8 đó bạn, mk bị lag tí......

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MN

Minh Nguyệt

23 tháng 7 2020

à nhầm có 2 nha

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NH

Nguyễn Hồng Mến

6 tháng 4 2015 - olm

1,A circular cynlinder with a volume 81 pi.if the perimeter of the base is 6 pi,the height is ?2,The total surface area of 2 indentical blocks which together with the volume is 1,458 units is ?3,If one side of 6-inch ruler will be marked in inches,how many points will be in the edge including 0 and 6 inch mark?4,Two sides of the O and P pointer that started from a vertical position as shown.Pointer O turns back the clock with a speed of 5 degrees per second and pointer P rotate clockwise at9...

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#Toán lớp 8

0

LT

Lê Thu Trang

10 tháng 6 2018 - olm

The average of three numbers is 42. All three are whole positive number and are different from each other.
If the least number is 20, what could be the greatest possible number of the remaining two numbers?

#Toán lớp 8

2

HT

Hoàng Trúc Nhi

10 tháng 6 2018

thích ra vẻ bằng cách viết tiếng anh à

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TQ

trần quang minh

21 tháng 12 2019

Đề của toán tiếng anh mà

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NV

Nguyễn Võ Văn Hùng

12 tháng 2 2017

The average of three numbers is 42. All three are whole positive number and are different from each other.
If the least number is 20, what could be the greatest possible number of the remaining two numbers?
Answer: ......

#Toán lớp 8

2

NQ

Nguyễn Quang Định

12 tháng 2 2017

106 mình nghĩ là vậy

(a+b+c):3=42=>a+b+c=126

Cho a< nhất, a=20 ( đề cho) => b+c=126-20=106

Vậy số lớn nhất có thể là 106

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MT

Minh Trúc

12 tháng 2 2017

Gọi 3 số là a,b,c:
(a+b+c)/3=42
đặt a là số bé nhất =>a=20(gỉa thiết)
a+b+c=42.3=126,mà a=20
=>b+c=126-20=106
Vậy tổng 2 số nguyên dương còn lại là 106

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F

fffffffffffffffff

17 tháng 12 2021

In a park in a small town in central England, John Pickering cuts the grass and waters the flowers. But all last week he was in Tokyo and millions of Japanese people watched the thirty-five-year-old gardener on television because John is the number one singer in Japan at the moment. John visited Japan a few months ago to sing in dance clubs in Osaka and Nagoya. A discjockey heard his songs and played them on his radio show. Hundreds of young people phoned the radio and asked the discjockey to...

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