a pound of butter có nghĩa là gì??????????
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Lời giải:
Gọi số sách mà Clara đã mua là $a$ và số tạp chí đã mua là $b$ (\(a,b\in\mathbb{N}^*\) )
Theo bài ra ta có: \(3,4a+1,6b=23\)
\(\Rightarrow 3,4a=23-1,6b\leq 23-1,6.1\) do \(b\geq 1\)
hay \(3,4a\leq 21,4\Rightarrow a\leq \frac{21,4}{3,4}\Rightarrow a\leq 6\)
Vì \(a\in\mathbb{N}^*\Rightarrow a\in\left\{1;2;3;4;5;6\right\}\)
Nếu \(a=1\Rightarrow b=\frac{23-3,4}{1,6}=\frac{49}{4}\not\in\mathbb{N}^*\) (loại)
Nếu \(a=2\Rightarrow b=\frac{23-3,4.2}{1,6}=\frac{81}{8}\not\in\mathbb{N}^*\) (loại)
Nếu \(a=3\Rightarrow b=\frac{23-3,4.3}{1,6}=8\) (thỏa mãn)
Nếu \(a=4\Rightarrow b=\frac{23-3,4.4}{1,6}=\frac{47}{8}\not\in\mathbb{N}\) (loại)
Nếu \(a=5\Rightarrow b=\frac{23-3,4.5}{1,6}=\frac{15}{4}\not\in\mathbb{N}^*\) (loại)
Nếu \(a=6\Rightarrow b=\frac{23-3,4.6}{1,6}=\frac{13}{8}\not\in\mathbb{N}^*\) (loại )
Vậy Clara mua $3$ quyển sách và $8$ quyển tạp chí.
Hiệu cân nặng giữa John và Sarah là:
67,5 - 26,5 = 41 (pound)
Nếu cân ngặn của cả John và Sarah cùng bớt đi x pound thì Sarah nặng bằng 1/3 John. Hiệu số phần bằng nhau là:
3 - 1 = 2 (phần)
Mà khi bớt đi ở cả hai số cùng 1 giá trị thì hiệu của chúng vẫn bằng nhau do đó 2 phần ứng với 41 pound. Vậy 1 phần ứng với:
41 : 2 = 20,5 (pound)
Vậy giá trị của x là:
26,5 - 20,5 = 6 (pound)
Số item đó chiếm số % là
\(75:87\times100=86,2\left(\%\right)\)
Nhớ tick mình nha bạn,cảm ơn nhiều.
1, If / baby / boy / we / call / Tom.
==> If the baby is boy, we will call it Tom
2, Jack / want / cup / coffee ?
==> Does Jack want a cup of coffee?
3, Mother/ go / shop / twice / week.
==> My mother goes shopping twice a week
4, I / like / buy / jar / jam / half / pound / butter.
==> I'd like to buy a jar of jam and half pound of butter
2. Does Jack want a cup of coffee?
3.My mother goes to shop twice a week.
4.I'd like to buy a jar of jam and half pound of butter
1. Be sure/ get up/ early/ you / be/ late/ school.
Be sure to get up early or you will be late for school.
2. I/ like / buy/ jar/ jam/ half/ pound/ butter
I'd to buy a jar of jam and half poud of butter
3. He/ able/ fishing/ classmates/ next holidays.
He is able to go fishing with his classmates next holidays
1. Be sure/ get up/ early/ you / be/ late/ school.
Be sure of getting up early or you'll be late for school.
2. I/ like / buy/ jar/ jam/ half/ pound/ butter
I'd like to buy a jar of jam and half a pound of butter.
3. He/ able/ fishing/ classmates/ next holidays.
He'll able to go fishing with his classmates next holidays.
Choose one correct answer in each drop-down list.
E-tailers are heading (1) with/for/at/on a record Christmas with forecasts that monthly spending over the internet is about to break through the £2 billion barrier for the first time. IMRG, the Internet retailing association, (2) Are/has/is/where predicting £5 billion total sales over the Christmas period. The Office for National Statistics revealed that British businesses sold £23.3bn worth of goods and (3)Services/product/food/charges on the Internet last year. The ONS survey shows that (4) Although/due to/because/despite strong growth it still represents only about 2.3 per cent of the UK's GDP, suggesting there is still plenty of room for growth. Analysts said that Britain remained Europe's biggest e-commerce market, (5)Looking/accounting/calling/waiting for more than a third of goods and sold over the Internet in the region. Forrester Research, (6) An/a/the/zero article independent research group predicts that British consumers will (7) Lose/spend/save/win £3.2bn over the Christmas trading period, ahead of Germany with £2.5bn (8) But/or/so/andFrance with £667m. Robin Terrell, the UK Managing Director of Amazon.com, one of the leading online (9) Wholesalers/producers/retailers/manufacturers predicted that shoppers would buy £2.1bn worth of electrical (10)Goods/Inventory/machines/product online by the end of the year, representing 8.5 per cent of all sales in the sector this year.
có nghĩa là một cân bơ
1 cân bơ
ủng hộ nha