第1題,126=2*7*3*3,A=7,B中方程解為6和-7,所以A大于B.
第2題,a,b,c都是整數(shù),取2,4,10,則平方和為420,成立.
第3題,A成本45,賣60;B利潤25%,所以成本80/1.25=64,那么現(xiàn)在賺的錢為100*15+50*16=2300.
第4題,A選項(xiàng)n=16,A小于B.
第5題,兩個(gè)男孩的概率為1/4,一男一女的概率為1/2.現(xiàn)在知道有一男,所以兩男的概率為1/4/(1/4+1/2)=1/3怎么不把我的列為滿意答案呢,傷心…第一題zeros就是0啊,使方程=0的解。
1)比大小(大于、小于、等于、不能確定 四個(gè)選項(xiàng))
1)比大小(大于、小于、等于、不能確定 四個(gè)選項(xiàng))
A、The greatest prime factor of 126
B、the zeros of f(x) = x2(x的平方)+x-42 (這個(gè)選項(xiàng)看不懂啊,)
2)a、b and c are all even integers,which of the following could be the value of a平方+b平方+c平方?
請問420是其中一個(gè)答案嗎?
3)The store sels two kinds of bags A and B,the selling price of A is 60 and the cost is 45,the selling price of B is 80 which include a markup that was 25 percent of the cost of B.What is the profit for sellin 100 A bags and 50 B bags?
A、2300
B、1500
C、1700
D、2100
E、3200
因?yàn)槲腋杏X缺了B的條件,所以不理解.
4)n=a的平方,the factors of n include 4,5,6
比大小:A、the least value of n
B、30
5) A couple have two children:one is a boy.What is the probability that both are boys?
A、1/3 B、1/2 C、3/4 D、2/3 E、1/4
這題我覺得應(yīng)該是B啊,因?yàn)槠渲幸粋€(gè)孩子的性別已經(jīng)確定了.但是答案不對.
A、The greatest prime factor of 126
B、the zeros of f(x) = x2(x的平方)+x-42 (這個(gè)選項(xiàng)看不懂啊,)
2)a、b and c are all even integers,which of the following could be the value of a平方+b平方+c平方?
請問420是其中一個(gè)答案嗎?
3)The store sels two kinds of bags A and B,the selling price of A is 60 and the cost is 45,the selling price of B is 80 which include a markup that was 25 percent of the cost of B.What is the profit for sellin 100 A bags and 50 B bags?
A、2300
B、1500
C、1700
D、2100
E、3200
因?yàn)槲腋杏X缺了B的條件,所以不理解.
4)n=a的平方,the factors of n include 4,5,6
比大小:A、the least value of n
B、30
5) A couple have two children:one is a boy.What is the probability that both are boys?
A、1/3 B、1/2 C、3/4 D、2/3 E、1/4
這題我覺得應(yīng)該是B啊,因?yàn)槠渲幸粋€(gè)孩子的性別已經(jīng)確定了.但是答案不對.
英語人氣:217 ℃時(shí)間:2020-04-06 05:37:51
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