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Algebra

The use of letters to substitute unknown numbers to form an equation. Solve the equation to get the unknown number using different methods such as simultaneous equations and more.

227,579 Questions

Would 5 7 and 8 be the measurements for a right triangle?

Oh, that's a happy little question! To find out if those measurements make a right triangle, we can use the Pythagorean theorem. If the square of the longest side (the hypotenuse) is equal to the sum of the squares of the other two sides, then it's a right triangle. Let's calculate and see if these numbers create a beautiful right triangle on our canvas.

What is x2 - x?

The expression x^2 - x represents a quadratic equation in standard form. It is a polynomial of degree 2, with x raised to the power of 2 and a coefficient of -1 for the linear term. This expression can be factored as x(x-1), which shows that it has two factors, x and (x-1). It is a parabolic function that opens upwards and crosses the x-axis at x=0 and x=1.

Surface area of a square 30ft x 10 ft?

Oh, dude, it's like super easy. So, to find the surface area of a square, you just multiply the length by the width. In this case, the length is 30 feet and the width is 10 feet, so you just do 30 x 10 and get 300 square feet. Boom! Math is fun, right?

Find 2 ways to get four fives to equal 30?

Well, honey, one way to get four fives to equal 30 is to add them all together: 5 + 5 + 5 + 5 = 20. Then, multiply that by the remaining 5: 20 x 5 = 30. Another way is to get creative and arrange the fives like this: (5 + 5) x (5 - 5) = 10 x 0 = 0 + 30 = 30. Voilà!

What is an object that's about 1 dm long?

Ah, what a delightful question! A lovely object that's about 1 decimeter long could be a small ruler, a paperback book, or even a cute little potted plant. Just imagine the possibilities of all the wonderful things you could create or measure with such a charming little object. Keep exploring and embracing the beauty around you, my friend.

Reduce the fraction 3648 to its lowest terms?

To reduce the fraction 3648 to its lowest terms, we need to find the greatest common divisor (GCD) of 3648 and then divide both the numerator and the denominator by this GCD. The prime factorization of 3648 is 2^5 * 3 * 19. To simplify, we can divide both the numerator and the denominator by the GCD, which is 48 (2^4 * 3). Therefore, 3648 ÷ 48 = 76. Thus, the fraction 3648 simplifies to 76 in its lowest terms.

How many combinations is there in 0000 9999?

If you have to find all the variations in the form of

0000

0001

0010

0100

1000

1001

...

...

9997

9998

9999

3332, 3323, 3233 and 2333 are made of the same numbers but are different and you have to count all four, that's why we are going to use variations - the order matters!

You can also see that repetitions are included. If you look it up, the formula needed in such case is nr where n is the number of elements (10) and r is the order of the sequence (4)

V = 104 = 10 000

But if you are looking for combinations the order doesn't matter, though you still have to include repetition

You use the binomial symbol Binomial[n+r-1,r] = (n+r-1)!/(r!*(n-1)!)

C = 13!/(4!*9!) = 13*12*11*10*9!/(4*3*2*9!) = 13*11*5 =715

Still a lot, though :D

The nth term of an sequence is 100-3n what are the first 3 terms?

To find the first three terms of the sequence defined by the formula 100-3n, you simply substitute n = 1, 2, and 3 into the formula. For n = 1, the first term is 100-3(1) = 100-3 = 97. For n = 2, the second term is 100-3(2) = 100-6 = 94. For n = 3, the third term is 100-3(3) = 100-9 = 91. Therefore, the first three terms of the sequence are 97, 94, and 91.

The word bit is made by combining what two words?

The word "bit" is made by combining the words "binary" and "digit." In computing, a bit is the smallest unit of data and can have a value of either 0 or 1, representing the binary system. The term "bit" was coined in the early 1940s as a contraction of these two words to describe the fundamental building block of digital information storage and processing.

Find the size of each interior angle of 6 sided regular polygon?

To answer this question, you need to know a few things, which you probably know already:

  1. Any two angles formed by a straight line and a line coming off it in any direction will add to 180 degrees.
  2. There are 360 degrees in a circle.
  3. In a regular polygon, all of the interior angles will be equal. (I'm sure there's no need to tell you what an interior angle is)

Now, if you think about it, in order for the hexagon (in other words, your 6-sided regular polygon; I'm going to call it a hexagon because it's shorter) be complete, the line that forms the outside of it has to go all the way around in a sort of circle. If you imagine that each side of the hexagon extends out in one direction, like a pinwheel, then the total of those small outside angles is 360 degrees.

There are 6 of those angles, so 360 divided by 6 gives 60 degrees per Exterior Angle in a hexagon.

Now, notice that there is one of these Exterior Angles per Interior Angle, and that the two add to 180 degrees (for the reasons stated above).

So, 180 minus 60 gives 120 degrees per interior angle!

This method works for all regular polygons. There is another method as well: The total of the interior angles in a triangle is 180 degrees. Pick one vertex (corner) of the polygon and draw lines from it to all the other vertices. Count the number of triangles you see, and multiply that number by 180. This gives you the sum of the interior angles in that polygon. Then, if it's regular, divide by the number of interior angles to give you the value of each interior angle.

Remember that both of these methods only work when the polygon is regular.

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What is the circumference of a cylinder 16 in diameter and 15cm height?

Ah, what a lovely question! To find the circumference of a cylinder, you'll want to use the formula 2πr, where r is the radius of the cylinder. Since the diameter is 16 inches, the radius would be half of that, which is 8 inches. So, the circumference would be 2 x π x 8, which is approximately 50.24 inches. Keep painting with those happy little numbers!

Show that of all line segments drawn from a given point not on it the perpendicular line segment is the shortest?

Hi!

Given: l is a straight line and A is a point not lying on l. AB⊥ l and C is a point on l.

To prove: AB < AC

Proof: In ∆ABC,

∠B = 90°

Since, C can lie anywhere on l (other than M)

So, AB is the shortest of all line segments drawn from A to l.

Cheers!

A triangle sides are 8Cm 11Cm and 15Cm What is the triangles area?

Well, darling, to find the area of a triangle with those side lengths, you can use Heron's formula. So, plug in those side lengths (a=8, b=11, c=15) into the formula, calculate the semi-perimeter, and then solve for the area. Voilà, you've got yourself the triangle's area.

What is the average of 10 20 and 30?

Well, honey, if you add 10, 20, and 30 together, you get 60. Then, to find the average, you divide that sum by the number of values, which in this case is 3. So, the average of 10, 20, and 30 is 20. And that's the tea, darling.

What is 5000000000000000000000000 plus 600000000000000000000 plus 90000000000000000000000000 equals?

Oh, dude, that's a lot of zeros! So, like, when you add 5000000000000000000000000, 600000000000000000000, and 90000000000000000000000000 together, you get 95560000000000000000000000. But, like, who's even counting at that point, right? Just a casual few trillion here and there.

How many 3's appear from 1 to 500?

Instead of going from 1 to 500, let's just subtract one from the set and come up with "How many 3's appear from 1 to 499?"

Total possible combinations in this, including leading zeros, is 5*10*10, i.e. 5 possible in the first set(0,1,2,3,4), and 10 in the second two(0,1,2,,4,5,6,7,8,9).

Instead of figuring out how many have a 3, lets figure out how many don't. Well there is 4 possibilities in the first (0,1,2,4), and nine in the second two (0,1,2,4,5,6,7,8,9).

So, total = 5 * 10 * 10 = 500

Without 3 = 4 * 9 * 9 = 324

500-324 = 176

There are 176 numbers from 1 to 500 that have the digit 3 in them.

What is 2 raise to the power of 100?

Well, honey, 2 raised to the power of 100 is one big ol' number! It's 1,267,650,600,228,229,401,496,703,205,376 - yep, that's a whole lot of twos multiplied together. So, if you ever need a number to impress your friends, this one should do the trick!

What is 830 in simplest form?

To simplify the number 830, we need to find the greatest common factor (GCF) between 830 and any other number. In this case, the number 830 is already in its simplest form because it cannot be divided evenly by any other number except 1 and itself. Therefore, 830 in simplest form remains as 830.

Every shape in the world?

Oh, dude, every shape in the world? That's like asking me to list every single type of bread in existence. There are circles, squares, triangles, hexagons, octagons, like, you name it. Basically, if you can draw it with a ruler or freehand after a few drinks, it's probably a shape.

List all the numbers that have 2 as a factor?

Well, see, that's going to be a problem, since there are an infinite number of them,

and we're a little busy just now.

But you can easily generate the list for yourself. Here's how:

-- Start at ' 1 ', and count.

-- Throw out the first number, then write down the second number.

-- Throw out a number, then write down the next number.

-- Throw out a number, then write down the next number.

-- Throw out a number, then write down the next number.

-- Throw out a number, then write down the next number.

Keep going like that. The list you write down will be a list of numbers that have ' 2 '

as a factor. You can just keep right on going for as long as you want, and make

that list as long as you want it to be.

You can also stop whenever you want to, and then you'll only have another

infinite number left to go.

Show shape that has more than 4 vertices?

A shape that has more than 4 vertices is called a polygon. Polygons are closed geometric figures with straight sides. Examples of polygons with more than 4 vertices include a pentagon (5 vertices), hexagon (6 vertices), heptagon (7 vertices), octagon (8 vertices), nonagon (9 vertices), decagon (10 vertices), and so on. Each vertex represents a point where two sides of the shape meet.

What does linear functions mean?

A linear function is a function in which only the first power of the variables appears.

A linear function is in the form of y=ax+b. When graphed, the graph is a straight line.

'a' is the slope of the line, 'b' is the value of 'y' where the line crosses the y-axis.

For example: y=2x+4 is a linear function

Does infinity minus infinity equal zero?

you would think it be would but infinity is not a number but a theory

so not being a number is can not be used with equations symbols like plus, minus, times etc.