All Questions ⁺⁰235615 Questions

+1

31

2

+5

Help Please

For an integer n, the inequality x^2+nx+15<-21
has no real solutions in x. Find the number of different possible values of n.

DaBadger Dec 13, 2023

+1

27

1

+13

geometry

Two concentric circles have radii 8 and 17, respectively. What is the length of the chord in the larger circle created by a tangent line to the smaller circle? read more ..

rb2919 Dec 13, 2023

0

37

4

+13

relatively hard math problem

There are two circles with radii 2 and 6. The centers of the circles are 10 units apart. What is the distance between the two tangency points as seen in the diagram? read more ..

rb2919 Dec 13, 2023

0

49

1

+817

need help

I have $5$ different mathematics textbooks and $4$ different psychology textbooks. In how many ways can I place the $9$ textbooks on a bookshelf, in a row, if all the psychology textbooks must be together, and all the mathematics textbooks must be toge read more ..

maximum Dec 13, 2023

0

33

0

+817

help counting

A speech class has five freshmen and four sophomores. (Everyone is distinguishable.) In how many ways can they stand in line, so that at least four of the freshmen are standing next to each other?

maximum Dec 13, 2023

0

33

1

+817

venn diagram

Dogs in the GoodDog Obedience School win a blue ribbon for learning how to sit, a green ribbon for learning how to roll over, and a white ribbon for learning how to stay. There are $100$ dogs in the school.
* $41$ have blue ribbons, $23$ have read more ..

maximum Dec 13, 2023

0

47

1

+817

help me

In the Olympic women's skating competition, the gold medal goes to first place, silver to second, and bronze to third. If there are $3$ skaters, including $3$ Americans, in how many ways can the medals be awarded to three of the $3$ skaters if exactly read more ..

maximum Dec 13, 2023

0

50

0

+1911

Inequality

All sacks of sugar have the same weight. All sacks of flour also have the same weight, but not necessarily the same as the weight of the sacks of sugar. Suppose that two sacks of sugar together with a sack of flour weigh no more than $10$ pounds, read more ..

tomtom Dec 13, 2023

0

39

1

+1911

help inequality

My street hockey team plays three games each week. My team lost all $9$ games in the first three weeks. Then, my team won one game and lost two games in the fourth week, bringing our record to $1$ win and $11$ losses. Each week after that, my team read more ..

tomtom Dec 13, 2023

0

29

1

+1911

Algebra

Five times a number is divided by $7$ more than that number. If the result is $0,$ then what was the original number?

tomtom Dec 13, 2023

0

48

0

+817

Counting

In the Olympic women's skating competition, the gold medal goes to first place, silver to second, and bronze to third. If there are $3$ skaters, including $3$ Americans, in how many ways can the medals be awarded to three of the $3$ skaters?
<read more ..

maximum Dec 13, 2023

0

45

0

+817

help counting

North High School has a math club and a science club. There are a students in the math club and b students who are members of both clubs. The total number of students is c. Find an expression for the total number of students read more ..

maximum Dec 13, 2023

0

37

1

+817

Counting

North High School has a math club and a science club. There are $a$ students in the math club and $b$ students who are members of both clubs. The total number of students is $c$. Find an expression for the total number of students read more ..

maximum Dec 13, 2023

0

23

1

+67

answer

Forty slips are placed into a hat, each bearing a number 1,2,3,4,5,6,7,8,9 or10 with each number entered on four slips. Four slips are drawn from the hat at random and without replacement. Let p be the probability that all four slips bear the same read more ..

USERSPPB Dec 13, 2023

0

21

1

+817

squares

Each square below is to be colored either red, yellow, or blue, so that no two consecutive squares have the same color. How many ways are there to color the squares? read more ..

maximum Dec 13, 2023

0

33

0

+817

need help

South High School offers only Chinese and Spanish. There are $5$ more students in Chinese than in Spanish, and every student takes at least one language. If there are a total of $12$ students in South High School, and $15$ students take only read more ..

maximum Dec 13, 2023

0

37

0

+817

help me

At my office, $4$ people own cats, $2$ people own dogs, and $5$ people own both cats and dogs. How many people own a cat or a dog?
(Remember that in mathematics, the word "or" is used in the inclusive sense. So if you own read more ..

maximum Dec 13, 2023

Dec 12, 2023

-1

54

0

+1427

Domain

An expression is well-defined if you can compute its value without any illegal operations. Examples of expressions that are [i]not[/i] well-defined include $1/0$ and $\sqrt{-10}$. For what values of $x$ is the expression
\[\frac{\sqrt{4x} read more ..

blackpanther Dec 12, 2023

-1

52

0

+1427

help with absolute value

What values of $x$ satisfy $|x - 4| + 2(x + 3) \leq 11 - 7|x + 1|$?
Express your answer in interval notation.

blackpanther Dec 12, 2023

0

54

0

+1911

logs

Solve the system of equations
y = log_2 (2x)
y = log_4 (16 + x)

tomtom Dec 12, 2023

-1

37

0

+1427

absolute value

Let $x$, $y$, and $z$ be nonzero real numbers. Find all possible values of
\frac{x}{|x|} + \frac{y}{|y|} + \frac{z}{|z|} + \frac{x + y}{|x + y|}.

blackpanther Dec 12, 2023

-1

28

0

+1427

absolute value

Find all $c$ such that $|c + 5| - 3c + |c + 2| = 10 - 7|c + 3|.$ Enter all the solutions, separated by commas.

blackpanther Dec 12, 2023

0

50

0

+1911

need help with percent

In a store window, there was a box of berries having a total weight of 200 kg. The berries were 90% water, by weight. After two days in the sun, the water content of the berries was only 80%, by weight. What was the total weight of the read more ..

tomtom Dec 12, 2023

0

50

0

+1911

Algebra

Fill in the blank so that the resulting exxpression can be factored as the product of the two linear equations
21mn - 21m + 19m + 6n - 14n + 8 + ___

tomtom Dec 12, 2023

0

51

0

+1911

hard counting

Six children are each offered a single scoop of any of flavors of ice cream from the Combinatorial Creamery. In how many ways can each child choose a flavor for their scoop of ice cream so that some flavor of ice cream is selected by exactly read more ..

tomtom Dec 12, 2023

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