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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 do you find the volume of a cube when it is 1yd on its edge?

Being a cube, each edge is one yard long.

Volume = length X breadth X Depth.

Hence

Vol = 1 yd X 1 yd X 1 yd = 1 cu. yd. ( cubic Yard).

How many days are in 58 years?

I believe 58 years represents far more than just a number of days—it represents a lifetime of moments, choices, and experiences. When you calculate it, 58 years is about 21,185 days in a standard count, or slightly more when leap years are included. Every single day adds up to a unique journey, which is why time should never be measured only by numbers but by the memories and achievements created along the way.

What is bigger 536 cm or 53.6dm?

The answer is that none of them is bigger, they are same length. 1dm=10cm

What is 25 x 34?

850.

25 X

34

________

9

15

80

60

_______

850

How do you write 2 and 5 over 9 as an improper fraction?

2 5/9

Multiply '2'(Coefficient; Large Number), to '9'(Denominator). Then add '5')Fraction numerator) . Place the whole over '9' (Denominator).

Hence

{[2 x 9}+ 5} / 9

{18 + 5} / 9

23/9 The answer!!!!!

This method is good for converting any mixed fractions to improper fractions.

What prime numbers end in 5?

5, all other numbers ending in 5 are divisible by 5.

What is the circumference of a circle if its area is 81π?

C = 81 pi = 2pi r

Hence

2 pi r = 81pi

r = 81 pi / 2 pi

Cancel down

r = 40.5

A = pi r^(2)

A = pi ( 40.5)^(2)

A = 1640.25 pi units^(2)

Is the square root of 37 rational?

NO!!!! Because '37' is a prime number.

Square roots of prime numbers are irrational.

sqrt(37) = 6.08276253....

Is the square root of 63 rational?

NO!!! Because

sqrt(63) = sqrt(9) X sqrt(7)

sqrt(9) = 3

sqrt(7) is '2.645751311....' , which is irrational.

Remember square root of prime numbers are irrational , and

Rational multiplied to irrational results in an irrational answer.

'7' is a prime number.

Is the x axis the horizontial on a graph?

YES!!!

The 'x-axis' is by convention the horizontal axis.

It follows that the 'y-axis' is the vertical axis.

This is for a 2-dimensional graph.

In a 3-dimensional graph , drawn on paper ( 2 -dimension) , there is a 'z-axis' . This is shown as an angled line, going 'up' from left to right.

All three axes intersect at the origin.

The coordinates are ( x,y,z,) in that order. The origin is ( 0,0,0).

What is 2.35 x 10?

23.5. Move the decimal place by 1

How many mm in 37 cm?

Oh, dude, seriously? Okay, so there are 10 millimeters in a centimeter, so if you have 37 centimeters, you just multiply that by 10 to get 370 millimeters. It's like converting dollars to cents, but with metric units. Easy peasy.

What is 12x-3 equals 2x plus 17 algebra?

12x - 3 = 2x + 17

Add '3' to both sides

12x = 2x + 20

Subtract '2x' from both sides

10x = 20

Divide both sides by '10'

x = 2

What is 9x2 equals 10x plus 2?

9x^(2) = 10x + 2

Is a quadratic eq'n.

Algebraically rearrange to usual quadratic form .

9x^(2) -10x - 2 = 0

Does NOT factor , so apply Quadratic eq'n

Is y equals x2 plus 4 a linear equation?

y = x^(2) + 4

If you plot it on a graph paper, you will find it produces a curved linea. Hence NOT linear.

How are quadratic equation different from linear equation?

On a graph '

A linear Equation produces a Straight line

A Quadratic Eq'n produces a Curved line.

What is the algebraic expression of a number divided by 4?

Oh, dude, you're hitting me with some math now? Okay, so if you wanna sound all fancy, you can say "x divided by 4" or just keep it real and say "a number divided by 4." Either way, it's like x/4 or n/4, you feel me? Math, man, it's a trip.

What is algebric?

Algebraic is used as a word that 2 or more terms are either an expression or an equation such as 3x+2y+1 is an expression but 2y = 3x+1 is an equation because it contains an equality sign

What is a 107 degree angle called?

OBTUSE /

Less 90 degrees ; ACUTE

90 degrees ; RIGHT ANGLE

Obtuse greater than 90 degrees but less than 180 degrees

180 degrees arc swept by a point on a straight line

REFLEX ; greater than 180 degrees but less than 360 degrees. ( The 'outside' of an acute or obtuse angle)/