tethega

In music, a chord is a group of notes sounded together. Chords are usually used as the basis for harmonies and typically (but not always) consist of three or more notes.

Your problem is asking us to divide 20 by 1/4.

To divide by fractions, you multiply the number by the reciprocal (the reciprocal is the number you multiply a number by to get 1) of the fraction. 

(20)/(1/4) turns into (20/1)*(4/1). 

Multiply the fractions out and you get 80/1, so your answer is 80 portions of apples.

Another way to do your problem could be to convert 1/4 to 0.25, and then compute 20/0.25 = 80. 

Factorial is considered the number of ways to arrange x distinct objects. 

1! is 1 because there is 1 way to arrange 1 object. [1]

2! is 2 because there are 2 ways to arrange 2 objects (AB, BA). [2*1]

3! is 6 because there are 6 ways to arrange 3 objects (ABC, ACB, BAC, BCA, CAB, CBA) [3*2*1]

^So on and so forth.

So, 0! is 1 because there is 1 way to arrange 0 objects (_). 

"A" could be any real number.

Start with 3(a+1)-5=3a-2.

3(a+1)−5=3a−2

3a+3+−5=3a+−2

3a+−2=3a−2

−2=−2

0=0

Getting 0=0 means that any real numbers will satisfy the value of a.

You need to know the height to be able to calculte the volume of a sphere.

The formula is pi*r^2*h/3.

The answer is not -1 1/3, it is -1 2/3

First of all, if adding a negative is the same thing as subtracting.

So, you can change the problem to 3 1/2 - 5 1/6 = 7/2 - 31/6 = 21/6 - 31/6 = -10/6 = -1 4/6 = -1 2/3

You could set up a proportion:

15/x = 3/10.

Cross multiply and you get 150 = 3x. Simplify further and you end up with x = 50. So, the team scored 50 points in all.

142

First, convert -23^2 and 19^2 into numbers, and you end up getting 529 and 361. 

Add up all of the numbers and get 1136.

Divide by the number of numbers there are (8). 

1136/8 = 142, which ends up being your answer.

142

First, convert -23^2 and 19^2 into numbers, and you end up getting 529 and 361. 

Add up all of the numbers and get 1136.

Divide by the number of numbers there are (8). 

1136/8 = 142, which ends up being your answer.

15 or -15.

The "l__l" bars represent absolute value, which is the distance a number is away from 0. Both 15 and -15 are 15 units away from 0. 

Please - partenthesis

Excuse - exponents

My - multiplication

Dear - division

Aunt - addition

Sally - subtraction

Mulpiplication/division have the same priority and are done in order from left to right (example - 3/4*2 is done as 3/4, then *2).

Same thing goes with addition/subtraction.

Everything else is done from top to bottom.

"Please Excuse My Dear Aunt Sally" is a nifty little way to remember the order of operations. Do enough practice problems, and pretty soon you'll have it memorized. 

First you have to get all of the variables on one side:

Subratacting x from both sides gives you the equation of 0=x^2-x-30. Add 30 to both sides in order to isolate the x's: 30=x^2-x.

The closest square numbers close to 30 are 36 (6^2) and 25 (5^2).

6 works for our new equation. Let's plug it in to the original equation and make sure it works; 6=36-30. Yep, we end up with 6=6.