Which of these are mathematical laws that us solve numerical problems? decimals graphs formulas percentages fractions

The mathematical laws that help us to solve numerical problems are:

Formulas.

Step-by-step explanation:

Decimals--

The decimals is just a numeral system which is used to represent an integer or an non-integer value.

Graphs--

The graphs are just a visual display of the data values  in the coordinate plane.

Formulas--

It is just a mathematical rule that is expressed in numerals or some other symbols and is used to solve a numerical problem.

Percentage--

In mathematics, a percentage is a number or a ratio expressed as a fraction of 100.

Fractions--

A fraction represent a part of something as a whole.

for example--

If a spinner has four sections of equal parts with different colors,.

Then the fraction of one part of the spinner is:

1/4

coins of silver or gold

step-by-step explanation:

, and

for

step-by-step explanation:

we can analyze the pattern at which the terms increase. let us denote , , , so that we can call

note the following:

the pattern: to get the next term value, we just add the next term number (e.g. 1st, 2nd, to the previous term value (term values are the given numbers in the question, 1, 3, 6, 10, 15,

from , to get to , we add

from , to get to , we add

etc.

we need to form a recursive formula, a formula that has the next term as a function of the previous term. so a possible recursive formula can be

, and for