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Post New Question
All Questions
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229750 Questions
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243
1
Polynomials
Find the constant t such that (5x^2 - 6x + 7)(4x^2 +tx + 10) = 20x^4 - 49x^3 + 108x^2 - 95x + 70.
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Guest
Dec 12, 2021
Dec 11, 2021
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182
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Exponents
Find all real solutions x to 4^x - 2^x = 56 + 11*2^x + 8.
Guest
Dec 11, 2021
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185
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Algebra
Suppose f(x) is a polynomial of degree 4 or greater such that f(1) = 2, f(2) = 3, and f(3) = -4. Find the remainder when f(x) is divided by (x - 1)(x - 2)(x - 3).
Guest
Dec 11, 2021
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221
1
Interest
How many dollars in interest are earned in two years on a deposit of $10,000 invested at 4.6% and compounded annually? Express your answer to the nearest cent.
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Guest
Dec 11, 2021
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283
1
Help Number Theory
Modify one digit in the number 31743 can make it a multiple of 281. What is the number after the change?
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Guest
Dec 11, 2021
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172
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Algebra
There are two pairs (x,y) of real numbers that satisfy the equation x + y = 4xy = 5. Given that the solutions x are in the form x = (a \pm b sqrt(c))/d , where a, b, c, and d are positive integers and the expression is completely simplified, what is the
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Guest
Dec 11, 2021
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226
2
please help!
Jeri finds a plie of money with at least . If she puts of the plie in her left pocket, gives away of the rest of the plie, and then puts the rest in her right pocket, she'll have more money than if she instead gave away of
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Guest
Dec 11, 2021
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290
1
Number Theory
What is the largest number k less than 1000 such that the remainder is 1 when k is divided by each of 3, 4, and 5?
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Guest
Dec 11, 2021
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284
2
Probability
If you were to pick two students out of a class of 7 girls and 6 boys, what is the probability that the students chosen are two boys?
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Guest
Dec 11, 2021
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370
2
+136
Binomial Question
What non-zero integer must be placed in the square so that the simplified product of these two binomials is a binomial:
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NaturalDisaster
Dec 11, 2021
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318
2
Help! Thanks:)
In right triangle , shown below, . What is ?
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Guest
Dec 11, 2021
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326
1
3d Geometry
A cylinder and a cone have the same volume. The cylinder has radius x and height y. The cone has radius 3x. Find the height of the cone in terms of y.
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Guest
Dec 11, 2021
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223
1
Sequence
Define the sequence of positive integers a_n recursively by a_1=3 and a_n=3(a_n- 1) for all n> =2. Determine the last two digits of a_{2007}.
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Guest
Dec 11, 2021
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253
1
Sequences
A sequence is formed by adding 2 to the triple of the previous term. If the first term is 1, how many multiples of 5 less than 10,000 would be terms of the sequence?
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Guest
Dec 11, 2021
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170
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Sequences
Recall that a Fibonacci sequence is one in which all entries from the third onward are the sum of the two entries before it. If the 5th and 8th entries of a Fibonacci Sequence are -19 and 79, respectively, then what is the first entry of this sequence?
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Guest
Dec 11, 2021
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337
2
+5
ABCD and EFGH are squares. Find [EFGH].
and are squares. Find
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HippoDrummer
Dec 11, 2021
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223
2
Surface area
Two cubes of volumes 8cm^3 and 27cm^3 are glued together at their faces to form a solid with the smallest possible surface area. What is the number of square centimeters in the surface area of the resulting solid? please help thank you
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Guest
Dec 11, 2021
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210
1
Decimals
We know that 1/13 =0.0769230769230769230769230769230769... When 1/130 is written as a repeating decimal, what is its 130th digit to the right of the decimal point?
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Guest
Dec 11, 2021
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292
1
Function question
Find the set of values a for which the range of the function
f(x) = (x^2 + a)/(x^2 - x + 1)
is the set of all real numbers.
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Guest
Dec 11, 2021
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278
1
Counting question
A ladybug is walking at random on a hexagon. She starts at vertex A.Every minute, she moves to one of the two vertices (chosen at random) adjacent to the one she's currently on. What is the probability that, after 12 minutes, she is back at A?
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Guest
Dec 11, 2021
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292
1
Counting
The positive integers from 1 to 150 inclusive are placed in a 10 by 15 grid so that each cell contains exactly one integer. Then the multiples of 3 are given a red mark, the multiples of 5 are given a blue mark, and the multiples of 7 are given a green
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Guest
Dec 11, 2021
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220
1
Percent Proportion Word Problem
Akira bought 18 pizzas. If there were a total of 30 pizzas, what percentage of the pizzas did he buy?
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Guest
Dec 11, 2021
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191
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Number Theory
We have positive integers a, b, and c such that a > b > c. When a, b, and c are divided by 19, the remainders are 4, 2, and 16 respectively. When the number 2a + b - c is divided by 19, what is the remainder?
Guest
Dec 11, 2021
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167
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Algebra
Marina solved the quadratic equation 9x^2-18x-720=8x^2-15x-640 by completing the square. In the process, she came up with the equivalent equation (x+r)^2 = s,where r and s are constants. What is s?
Guest
Dec 11, 2021
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237
1
Geometry
In the regular octagon below, find x.
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Guest
Dec 11, 2021
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