All Questions ⁺⁰235690 Questions

0

59

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

36

1

+1911

help plz

For what real number k is 8 + ki + 7 - 3i a real number?

tomtom Nov 7, 2023

0

46

2

+1911

complex numbers

Fill in the blanks with real numbers.
(11 - 7i)*(2 + i) = ___ + ___ i

tomtom Nov 7, 2023

0

25

1

+1911

complex numbers

Fill in the blanks with real numbers.
(11 - 7i) + (2 + i) = ___ + ___ i

tomtom Nov 7, 2023

0

41

2

+743

complex numbers

Compute (1 + i)/(2 - i)(3 + i).

bingboy Nov 7, 2023

0

49

1

+743

simplify

Simplify the expression
\frac{1}{\sqrt{36}} - \sqrt{27} - \frac{1}{\sqrt{27}} - \sqrt{18} + \frac{1}{\sqrt{18}} - \sqrt{9}

bingboy Nov 7, 2023

+1

54

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?

BobbyIG Nov 7, 2023

+1

61

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 ..

bingboy Nov 7, 2023

+1

64

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.

tomtom Nov 7, 2023

0

50

1

+1911

simplify

Simplify the expression
\frac{3}{\sqrt{2}} + \frac{7}{\sqrt{8}} + \frac{2}{\sqrt{32}} - \frac{5}{\sqrt{128}}

tomtom Nov 7, 2023

0

33

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).

tomtom Nov 7, 2023

0

30

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

tomtom Nov 7, 2023

0

63

0

+1911

how to do this

Compute
123456789^2 - 2\cdot123456789\cdot 123456789 + 123456789^2
without using a calculator.

tomtom Nov 7, 2023

-1

42

0

+1443

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

57

1

+1443

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 ..

blackpanther Nov 7, 2023

-1

59

0

+1443

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

26

1

+1443

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.

blackpanther Nov 7, 2023

-1

44

1

+1443

equation

Find all values of x such that 9(x + 3) = -8 + x.

blackpanther Nov 7, 2023

-1

32

1

+1443

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.

blackpanther Nov 7, 2023

0

30

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?

NeevTheSolver Nov 7, 2023

-1

50

1

+1443

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.

blackpanther Nov 7, 2023

Nov 6, 2023

-1

63

0

+1443

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

48

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

46

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 ..

bader Nov 6, 2023

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