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Post New Question
All Questions
+0
236048 Questions
0
63
0
+1911
factoring
Select a sign ($+$ or $-$) and fill in the blank with a constant, so that the resulting expression can be factored as the product of two linear factors.
2mn - 21m + 5n - mn + 14m + 6n + ___
tomtom
Nov 7, 2023
0
38
1
+1911
help plz
For what real number k is 8 + ki + 7 - 3i a real number?
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tomtom
Nov 7, 2023
0
47
2
+1911
complex numbers
Fill in the blanks with real numbers.
(11 - 7i)*(2 + i) = ___ + ___ i
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tomtom
Nov 7, 2023
0
29
1
+1911
complex numbers
Fill in the blanks with real numbers.
(11 - 7i) + (2 + i) = ___ + ___ i
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tomtom
Nov 7, 2023
0
43
2
+743
complex numbers
Compute (1 + i)/(2 - i)(3 + i).
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bingboy
Nov 7, 2023
0
55
1
+743
simplify
Simplify the expression
\frac{1}{\sqrt{36}} - \sqrt{27} - \frac{1}{\sqrt{27}} - \sqrt{18} + \frac{1}{\sqrt{18}} - \sqrt{9}
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bingboy
Nov 7, 2023
+1
60
1
+5
Is it possible to make , (comma) for the decimals?
Hey
In denmark we use , to make decimal like 3,14 for pi instead of the 3.14 that is in this web browser. I wanted to know if it is possible to change that or no?
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BobbyIG
Nov 7, 2023
+1
64
1
+743
help me plz
A factory manufactures two types of gadgets: regular and premium.
Each gadget requires two stages, assembly, and finishing, and there are at most 120 hours available for each operation (that is, 120 hours for assembly, and 120 hours
read more ..
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bingboy
Nov 7, 2023
+1
69
1
+1911
help needed
Let r and s be the roots of 2x^2 + 5x - 13 = x^2 - 7x + 40. Find r^2 + s^2.
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tomtom
Nov 7, 2023
0
57
1
+1911
simplify
Simplify the expression
\frac{3}{\sqrt{2}} + \frac{7}{\sqrt{8}} + \frac{2}{\sqrt{32}} - \frac{5}{\sqrt{128}}
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tomtom
Nov 7, 2023
0
40
1
+1911
quadratic roots
Let a and b be the roots of x^2 + 7x - 4 = -x^2 + 7x - 15. Find (a + 3)(b + 3).
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tomtom
Nov 7, 2023
0
32
1
+1911
quadratics
One of the five quadratics below has a repeated root. (The other four have distinct roots.) What is the repeated root?
-x^2 - 18x + 49
3x^2 - 6x + 48
8x^2 - 32x + 16
25x^2 - 30x + 9<#> x^2 - 14x + 16
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tomtom
Nov 7, 2023
0
71
0
+1911
how to do this
Compute
123456789^2 - 2\cdot123456789\cdot 123456789 + 123456789^2
without using a calculator.
tomtom
Nov 7, 2023
-1
48
0
+1521
quadratic
We are looking to factor the quadratic $23x^2 + kx - 5 - 11x^2 - 5.$ Some values of $k$ allow us to factor it as a product of linear binomials with integer coefficients. What are all such values of $k?$
blackpanther
Nov 7, 2023
-1
60
1
+1521
quadratic equation
Wilma and Greg were trying to solve the quadratic equation
x^2 + bx + c = 0.
Wilma wrote down the wrong value of $b$ (but her value of $c$ was correct), and found the roots to be $-5$ and $5.$ Greg wrote down the wrong value of $c$ (but
read more ..
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blackpanther
Nov 7, 2023
-1
63
0
+1521
help with algebra
A box has a certain length, width, and height. The length of the box is equal to four times its width, as well as equal to $6$ less than its height. If the total surface area of the box is $234,$ then what is the height of the box?
blackpanther
Nov 7, 2023
-1
28
1
+1521
help plz
Find all values of $x$ such that
\frac{2x}{x + 2} = \frac{x}{x - 4}.
If you find more than one value, then list your solutions, separated by commas.
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blackpanther
Nov 7, 2023
-1
48
1
+1521
equation
Find all values of x such that 9(x + 3) = -8 + x.
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blackpanther
Nov 7, 2023
-1
34
1
+1521
quadratic
Find all values of $x$ such that $x^2 - 5x + 4 = 0 $. If you find more than one value, then list your solutions, separated by commas.
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blackpanther
Nov 7, 2023
0
31
2
+4
I'm doing this with my mom and need help. Please explain the solution
How many distinct four-letter permutations are possible using four of the ten letters in MATHCOUNTS?
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NeevTheSolver
Nov 7, 2023
-1
54
1
+1521
algebra
I'm thinking of a number. My number has the property that its square is equal to $270$ more than five times the number. Enter all numbers that have this property.
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blackpanther
Nov 7, 2023
Nov 6, 2023
-1
67
0
+1521
factoring
Factor x^2 - 8x + 15 + x^2 - 4x + 3
Find all values of x such that x^2 - 8x + 15 + x^2 - 4x + 3 = 0. If you find more than one value, then list your solutions, separated by commas.
blackpanther
Nov 6, 2023
0
51
0
+1768
need help
Find the number of positive integers that satisfy both the following conditions:
* Each digit is a $1$ or a $2$ or a $3$
* The sum of the digits is $12$
bader
Nov 6, 2023
0
49
1
+1768
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 19 skaters, including 2 Americans and 5 Canadians, in how many ways can the medals be awarded to three of the 19 skaters
read more ..
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bader
Nov 6, 2023
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