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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

How many number combinations for 9 digits?

999,999,999 if you don't include 000000000, otherwise 1,000,000,000.

If you don't allow repeated digits then 9 factorial, ie 9 x 8 x 7 x 6 x 5 x 4 x 3 x 2 = 362,880.

4.5 m is how many cm?

To convert meters to centimeters, you need to know that 1 meter is equal to 100 centimeters. Therefore, to convert 4.5 meters to centimeters, you would multiply 4.5 by 100. This results in 450 centimeters. So, 4.5 meters is equal to 450 centimeters.

What is 2 times by itself 30 times?

Well, darling, 2 times itself 30 times is 2 to the power of 30, which equals a whopping 1,073,741,824. That's a whole lot of twos dancing together in a mathematical tango. Hope that satisfies your number-crunching curiosity!

What is The reciprocal of 8.9?

Ah, the reciprocal of 8.9 is simply 1 divided by 8.9, which equals approximately 0.112. Remember, in the world of numbers, everything has its own special place and value. Just like in painting, every color on your palette has a purpose and beauty of its own.

How do you write 5 subtracted from a quarter of s as an expression?

To write "5 subtracted from a quarter of s" as an expression, you can first express a quarter of s as s/4, and then subtract 5 from it. The expression would be s/4 - 5.

What do you mean 10'x10'?

Oh, dude, 10'x10' means like 10 feet by 10 feet. It's a way to measure the size of something, like a room or a piece of furniture. So, if you're trying to figure out if that new couch will fit in your living room, just whip out a tape measure and check if it's smaller than 10'x10'. Easy peasy!

How do you write 421.5 in expanded form?

421.5 = (4 x 100) + (2 x 10) + (1 x 1) + (5/10)

What is the difference between the polynomial and multinomial?

Any sum of one or more terms is called a Polynomial. Polynomials have different names.

for example

x is a monomial*

x+1 is a binomial

x-1+y is a trinomial

x-1+y+2x is a multinomial (could have been called quadnomial but ... lol nah)

So what is a Quadratic? It is just a polynomial where the highest exponent (power) is 2. Basically, a polynomial of the 2nd degree algebraically.

For example,

x²+y-3 is a quadratic trinomial

x² is a quadratic monomial

*by the way if you are wondering what makes a term like x or x² a sum or a polynomial when there is nothing else you see that is being added or taken away then see this ...

x = x + 1 - 1

x² = x² + 1 - 1

What is two thirds of 70?

Well, isn't that a happy little math problem! Two thirds of 70 is like painting a beautiful picture with numbers. Simply divide 70 by 3 to get 23.33, then multiply that by 2 to get 46.67. So, two thirds of 70 is 46.67. Just remember, there are no mistakes in math, only happy little accidents.

What does the 3 in 3.62 stand for?

Well, darling, the 3 in 3.62 stands for the hundreds place. In a decimal number like 3.62, each digit's position represents a power of 10. So, from left to right, you've got the tens place, the ones place, and then the hundreds place where that sassy little 3 is hanging out.

How do you write seven and five tenths in standard form?

To write seven and five tenths in standard form, you would simply add the whole number part (7) to the decimal part (0.5). This would give you 7.5 in standard form.

How do you convert 9 percent percent into a whole number?

To convert 9% into a whole number, you first need to remove the percentage sign and divide the percentage value by 100. In this case, 9% divided by 100 equals 0.09. To convert this decimal into a whole number, you can multiply it by 100 to get 9 as the whole number equivalent of 9%.

What fraction of 3 hours is 20 minutes?

Turn that timing into miniutes, so:

(60x3)+20=200 mins

Then you can put any number above the answer to make it a fraction, say 10/200 which could be cancelled down to 1/20.

Why is volume measured in cubed units?

Volume is measured in cubed units because volume is a three-dimensional measurement that involves length, width, and height. When measuring volume, we are essentially measuring the amount of space an object occupies in three dimensions. Cubing the units ensures that the measurement reflects this three-dimensional aspect, as opposed to just a single linear measurement.

What is the answer X is a missing number x has 3 digits the tens digit is half the hundreds digit thenumber is odd the sum of the digits is 9 what is x?

Well, isn't that just a happy little mystery we have here! Let's take a closer look at our clues. If the tens digit is half the hundreds digit and the sum of the digits is 9, we can see that the hundreds digit must be 6, the tens digit is 3, and the units digit is 0. So the missing number X is 630. Happy solving, my friend!

The diference of 10 and 5?

10 - 5 = 5 The difference between 10 and 5 is 5.

The perimeter of a placemat is 1489 How many cm is that?

To find the length of each side of the placemat, you would divide the perimeter by 4 since a placemat typically has four sides. Therefore, 1489 cm ÷ 4 = 372.25 cm. Each side of the placemat would be approximately 372.25 cm long.

How do you convert 264 yards per second to miles per hour?

To convert yards per second to miles per hour, you can use the conversion factor: 1 mile = 1,760 yards and 1 hour = 3,600 seconds.

So, to convert 264 yards per second to miles per hour: 264 yards/second * 1 mile/1,760 yards * 3,600 seconds/1 hour ≈ 169.09 miles per hour.

How much does 42 cm equal in length?

42 cm is equal to 0.42 meters. This conversion is based on the fact that there are 100 centimeters in one meter. Therefore, to convert centimeters to meters, you divide the number of centimeters by 100.

What is the unit rate of 60 minutes 75 questions?

Well, honey, the unit rate of 60 minutes for 75 questions is 0.8 questions per minute. So, you better buckle up and get ready to answer those questions at a lightning speed of 0.8 questions every 60 seconds. Good luck, you're gonna need it!