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题目内容
A certain money market account that had a balance of $48,000 during all of last month earned $360 in interest for the month. At what simple annual interest rate did the account earn interest last month?
If someone puts away $1,000 in a bank with an annual simple interest rate of 3%, then at least by how many years will the account exceed $1,200?

_____years
At the beginning of a certain year, Jane opened a new savings account and a new money market account and deposited a total of $10,000 into the two accounts. The savings account and the money market account earned simple annual interest at the rates of 2 percent and 5 percent, respectively. There were no other transactions in the accounts. If the total amount of interest earned by the two accounts for the first 2 years after they were opened was $475, what was the amount that Jane deposited into the money market account?

$_____
A total of $48,000 was invested for one month in a new money market account that paid simple annual interest at the rate of r percent. If the investment earned $240 in interest for the month, what is the value of r?
$3,000 is the initial amount placed in an account and the interest compounds monthly, and the total value is $3,090 at the end of the first month. At the end of the second month, what fraction of the total interest of the two months is the interest of the second month?

Give your answer as a fraction.
Paul's family put $$m$$ dollars in a new savings account on May 2, 1990, and put the same number of dollars in the account on May 2, 1991, and again on May 2, 1992. If the annual interest rate on this account was 4 percent compounded annually and there were no other deposits to the account or withdrawals from the account, which of the following represents the total number of dollars in the account on May 2, 1993, just after interest had been compounded for the third time, in terms of $$m$$?
There are 10 people in a room. If each person shakes hands with exactly 3 other people, what is the total number of handshakes?
The sum of n numbers is greater than 48. If the average (arithmetic mean) of the n numbers is 1.2, what is the least possible value of n?
3x+y=5x-y

Quantity A

x

Quantity B

y
5(x-y+20)=y+100

y≠0

Quantity A

$$\frac{x}{y}$$

Quantity B

1
$$x((75+y)+(15-y))=900$$

Quantity A

$$xy$$

Quantity B

$$10$$
1 < 2x+1 < 3

Quantity A

($$x^{2}$$-5)-(x-5)

Quantity B

0
R wins 101 more votes than T. If x votes are removed from R and given to T, then T will have more votes than R.

Quantity A

The least value of x

Quantity B

51
$$x \gt 0$$ and $$\frac{5}{27}x^{2}$$=$$x$$

Quantity A

$$x$$

Quantity B

$$5$$
$$x$$ and $$y$$ are positive integers

$$x^{2}$$+$$y^{2}$$=89

$$xy=40$$

Quantity A

|$$x-y$$|

Quantity B

$$3$$
xy = 2

If the average of x and y is 3, then $$x^{2}$$ + $$y^{2}$$ = ?
If $$(x+\frac{1}{x})^{2}$$=4, then $$x^{2}$$+$$(\frac{1}{x})^{2}$$= ?
x ≠ 0

$$(a+\frac{1}{a})^{2}$$=5

Quantity A

$$a^{2}$$+$$(\frac{1}{a})^{2}$$

Quantity B

3
x > 0, y > 0

Quantity A

x+y

Quantity B

$$\sqrt{x^{2}+y^{2}}$$
x > 0, y < 0

Quantity A:x+y-1

Quantity B:x-y+1

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